./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI --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 d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 --- 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-5e519f3 [2022-11-03 02:37:52,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:37:52,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:37:52,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:37:52,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:37:52,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:37:52,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:37:52,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:37:52,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:37:52,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:37:52,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:37:52,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:37:52,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:37:52,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:37:52,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:37:52,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:37:52,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:37:52,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:37:52,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:37:52,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:37:52,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:37:52,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:37:52,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:37:52,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:37:52,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:37:52,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:37:52,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:37:52,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:37:52,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:37:52,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:37:52,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:37:52,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:37:52,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:37:52,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:37:52,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:37:52,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:37:52,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:37:52,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:37:52,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:37:52,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:37:52,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:37:52,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:37:52,433 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:37:52,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:37:52,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:37:52,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:37:52,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:37:52,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:37:52,435 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:37:52,436 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:37:52,436 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:37:52,436 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:37:52,436 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:37:52,437 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:37:52,437 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:37:52,437 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:37:52,437 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:37:52,438 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:37:52,438 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:37:52,438 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:37:52,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:37:52,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:37:52,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:37:52,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:37:52,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:37:52,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:37:52,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:37:52,440 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:37:52,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:37:52,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:37:52,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:37:52,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:37:52,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:37:52,442 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:37:52,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:37:52,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:37:52,443 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:37:52,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:37:52,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:37:52,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:37:52,443 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_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 [2022-11-03 02:37:52,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:37:52,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:37:52,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:37:52,761 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:37:52,762 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:37:52,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2022-11-03 02:37:52,834 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/data/91ef68305/1b50d1a82d46447ea0a5ab4219bd2212/FLAGd58ff0b6d [2022-11-03 02:37:53,670 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:37:53,675 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2022-11-03 02:37:53,703 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/data/91ef68305/1b50d1a82d46447ea0a5ab4219bd2212/FLAGd58ff0b6d [2022-11-03 02:37:53,727 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/data/91ef68305/1b50d1a82d46447ea0a5ab4219bd2212 [2022-11-03 02:37:53,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:37:53,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:37:53,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:37:53,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:37:53,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:37:53,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:37:53" (1/1) ... [2022-11-03 02:37:53,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27ddb35c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:53, skipping insertion in model container [2022-11-03 02:37:53,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:37:53" (1/1) ... [2022-11-03 02:37:53,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:37:53,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:37:54,144 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2022-11-03 02:37:54,152 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2022-11-03 02:37:54,879 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:54,880 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:54,881 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:54,881 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:54,883 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:54,898 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:54,899 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:54,901 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:54,902 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:54,904 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:54,905 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:54,906 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:54,906 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,246 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:37:55,247 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:37:55,249 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:37:55,250 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:37:55,251 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:37:55,252 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:37:55,253 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:37:55,254 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:37:55,254 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:37:55,255 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:37:55,377 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:37:55,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:37:55,417 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:37:55,431 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2022-11-03 02:37:55,432 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2022-11-03 02:37:55,496 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,497 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,497 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,498 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,512 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,521 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,521 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,523 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,523 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,524 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,525 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,526 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,526 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:37:55,594 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:37:55,607 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:37:55,608 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:37:55,609 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:37:55,610 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:37:55,611 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:37:55,611 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:37:55,612 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:37:55,612 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:37:55,613 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:37:55,662 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:37:55,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:37:56,005 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:37:56,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56 WrapperNode [2022-11-03 02:37:56,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:37:56,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:37:56,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:37:56,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:37:56,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56" (1/1) ... [2022-11-03 02:37:56,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56" (1/1) ... [2022-11-03 02:37:56,140 INFO L138 Inliner]: procedures = 679, calls = 1048, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 150 [2022-11-03 02:37:56,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:37:56,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:37:56,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:37:56,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:37:56,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56" (1/1) ... [2022-11-03 02:37:56,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56" (1/1) ... [2022-11-03 02:37:56,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56" (1/1) ... [2022-11-03 02:37:56,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56" (1/1) ... [2022-11-03 02:37:56,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56" (1/1) ... [2022-11-03 02:37:56,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56" (1/1) ... [2022-11-03 02:37:56,180 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56" (1/1) ... [2022-11-03 02:37:56,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56" (1/1) ... [2022-11-03 02:37:56,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:37:56,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:37:56,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:37:56,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:37:56,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56" (1/1) ... [2022-11-03 02:37:56,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:37:56,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:56,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:37:56,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:37:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:37:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:37:56,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:37:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:37:56,311 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:37:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:37:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-03 02:37:56,312 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-03 02:37:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:37:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:37:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_insert_before [2022-11-03 02:37:56,312 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_insert_before [2022-11-03 02:37:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:37:56,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:37:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:37:56,313 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:37:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:37:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:37:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:37:56,314 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-03 02:37:56,315 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-03 02:37:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-03 02:37:56,316 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-03 02:37:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:37:56,671 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:37:56,689 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:37:57,102 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:37:57,267 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:37:57,268 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:37:57,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:37:57 BoogieIcfgContainer [2022-11-03 02:37:57,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:37:57,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:37:57,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:37:57,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:37:57,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:37:53" (1/3) ... [2022-11-03 02:37:57,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c06ac45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:37:57, skipping insertion in model container [2022-11-03 02:37:57,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:56" (2/3) ... [2022-11-03 02:37:57,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c06ac45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:37:57, skipping insertion in model container [2022-11-03 02:37:57,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:37:57" (3/3) ... [2022-11-03 02:37:57,288 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_push_back_harness.i [2022-11-03 02:37:57,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:37:57,309 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:37:57,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:37:57,409 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;@5ff0ac9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:37:57,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:37:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-03 02:37:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:37:57,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:57,438 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:57,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:57,447 INFO L85 PathProgramCache]: Analyzing trace with hash 520735072, now seen corresponding path program 1 times [2022-11-03 02:37:57,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:57,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429673887] [2022-11-03 02:37:57,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:57,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:37:59,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:59,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429673887] [2022-11-03 02:37:59,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429673887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:59,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836878538] [2022-11-03 02:37:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:59,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:59,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:59,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:59,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:37:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:59,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:37:59,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:37:59,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:59,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836878538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:59,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:37:59,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 10 [2022-11-03 02:37:59,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994696429] [2022-11-03 02:37:59,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:59,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:37:59,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:37:59,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:37:59,525 INFO L87 Difference]: Start difference. First operand has 73 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 7 states, 4 states have (on average 4.75) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-03 02:37:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:59,829 INFO L93 Difference]: Finished difference Result 140 states and 205 transitions. [2022-11-03 02:37:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:37:59,832 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 4.75) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 42 [2022-11-03 02:37:59,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:59,845 INFO L225 Difference]: With dead ends: 140 [2022-11-03 02:37:59,845 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 02:37:59,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:37:59,856 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 16 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:59,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 334 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:37:59,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 02:37:59,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-11-03 02:37:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:37:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2022-11-03 02:37:59,913 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 42 [2022-11-03 02:37:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:59,914 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2022-11-03 02:37:59,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 4.75) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-03 02:37:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2022-11-03 02:37:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:37:59,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:59,917 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:59,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:38:00,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:00,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:00,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1517449636, now seen corresponding path program 1 times [2022-11-03 02:38:00,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:38:00,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778869201] [2022-11-03 02:38:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:00,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:38:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:38:00,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:38:00,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778869201] [2022-11-03 02:38:00,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778869201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:00,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:38:00,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:38:00,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009586574] [2022-11-03 02:38:00,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:00,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:38:00,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:38:00,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:38:00,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:38:00,572 INFO L87 Difference]: Start difference. First operand 73 states and 100 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:38:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:00,822 INFO L93 Difference]: Finished difference Result 140 states and 193 transitions. [2022-11-03 02:38:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:38:00,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 44 [2022-11-03 02:38:00,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:00,827 INFO L225 Difference]: With dead ends: 140 [2022-11-03 02:38:00,827 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 02:38:00,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:38:00,832 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 43 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:00,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 391 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:38:00,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 02:38:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-11-03 02:38:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:38:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2022-11-03 02:38:00,846 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 44 [2022-11-03 02:38:00,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:00,847 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2022-11-03 02:38:00,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:38:00,847 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2022-11-03 02:38:00,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:38:00,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:00,849 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:00,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:38:00,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash -301934184, now seen corresponding path program 1 times [2022-11-03 02:38:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:38:00,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30789583] [2022-11-03 02:38:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:00,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:38:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:38:01,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:38:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30789583] [2022-11-03 02:38:01,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30789583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:01,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:38:01,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:38:01,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137832845] [2022-11-03 02:38:01,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:01,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:38:01,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:38:01,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:38:01,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:38:01,209 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:38:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:01,481 INFO L93 Difference]: Finished difference Result 149 states and 206 transitions. [2022-11-03 02:38:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:38:01,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 46 [2022-11-03 02:38:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:01,486 INFO L225 Difference]: With dead ends: 149 [2022-11-03 02:38:01,486 INFO L226 Difference]: Without dead ends: 81 [2022-11-03 02:38:01,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:38:01,493 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 69 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:01,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 450 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:38:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-03 02:38:01,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-11-03 02:38:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:38:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-11-03 02:38:01,513 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 46 [2022-11-03 02:38:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:01,513 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-11-03 02:38:01,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:38:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-11-03 02:38:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:38:01,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:01,515 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:01,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:38:01,516 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:01,516 INFO L85 PathProgramCache]: Analyzing trace with hash -271050449, now seen corresponding path program 1 times [2022-11-03 02:38:01,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:38:01,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121098801] [2022-11-03 02:38:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:01,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:38:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:38:01,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:38:01,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121098801] [2022-11-03 02:38:01,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121098801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:01,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:38:01,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:38:01,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198244900] [2022-11-03 02:38:01,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:01,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:38:01,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:38:01,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:38:01,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:38:01,891 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 02:38:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:02,009 INFO L93 Difference]: Finished difference Result 145 states and 202 transitions. [2022-11-03 02:38:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:38:02,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2022-11-03 02:38:02,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:02,011 INFO L225 Difference]: With dead ends: 145 [2022-11-03 02:38:02,011 INFO L226 Difference]: Without dead ends: 80 [2022-11-03 02:38:02,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:38:02,013 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 35 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:02,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 216 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:38:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-03 02:38:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-11-03 02:38:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:38:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2022-11-03 02:38:02,024 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 47 [2022-11-03 02:38:02,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:02,024 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2022-11-03 02:38:02,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 02:38:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2022-11-03 02:38:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:38:02,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:02,026 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:02,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:38:02,027 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:02,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:02,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1195380273, now seen corresponding path program 1 times [2022-11-03 02:38:02,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:38:02,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823685271] [2022-11-03 02:38:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:02,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:38:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:38:02,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:38:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823685271] [2022-11-03 02:38:02,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823685271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218082203] [2022-11-03 02:38:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:02,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:02,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:02,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:02,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:38:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:03,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:38:03,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:38:03,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:03,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218082203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:03,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:38:03,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 11 [2022-11-03 02:38:03,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853999929] [2022-11-03 02:38:03,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:03,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:38:03,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:38:03,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:38:03,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:38:03,086 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 8 states, 5 states have (on average 5.0) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 02:38:03,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:03,334 INFO L93 Difference]: Finished difference Result 145 states and 196 transitions. [2022-11-03 02:38:03,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:38:03,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 5.0) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 50 [2022-11-03 02:38:03,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:03,336 INFO L225 Difference]: With dead ends: 145 [2022-11-03 02:38:03,336 INFO L226 Difference]: Without dead ends: 79 [2022-11-03 02:38:03,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:38:03,338 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 18 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:03,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 455 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:38:03,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-03 02:38:03,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-11-03 02:38:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:38:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2022-11-03 02:38:03,350 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 50 [2022-11-03 02:38:03,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:03,350 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2022-11-03 02:38:03,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 5.0) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 02:38:03,351 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2022-11-03 02:38:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:38:03,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:03,352 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:03,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:03,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:03,573 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:03,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:03,573 INFO L85 PathProgramCache]: Analyzing trace with hash -286328061, now seen corresponding path program 1 times [2022-11-03 02:38:03,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:38:03,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341365540] [2022-11-03 02:38:03,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:03,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:38:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:38:04,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:38:04,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341365540] [2022-11-03 02:38:04,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341365540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:04,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221041353] [2022-11-03 02:38:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:04,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:04,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:04,811 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:04,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:38:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:05,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 02:38:05,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:05,304 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:38:05,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 02:38:05,320 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:38:05,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 02:38:18,142 WARN L234 SmtUtils]: Spent 8.42s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:38:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:38:19,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:38:20,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221041353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:20,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073801012] [2022-11-03 02:38:20,850 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-03 02:38:20,850 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:38:20,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:38:20,859 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:38:20,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:38:20,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:20,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,034 INFO L356 Elim1Store]: treesize reduction 102, result has 36.3 percent of original size [2022-11-03 02:38:21,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 83 [2022-11-03 02:38:21,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,258 INFO L356 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2022-11-03 02:38:21,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2022-11-03 02:38:21,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:38:21,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:38:21,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:38:21,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:38:21,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:21,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:38:22,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:38:22,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 02:38:22,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:38:23,555 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 160 for LOIs [2022-11-03 02:38:24,803 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 218 for LOIs [2022-11-03 02:38:24,937 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 130 for LOIs [2022-11-03 02:38:24,967 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:38:25,059 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:38:47,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2073801012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:47,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:38:47,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [9, 9, 6] total 39 [2022-11-03 02:38:47,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478836585] [2022-11-03 02:38:47,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:47,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:38:47,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:38:47,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:38:47,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1299, Unknown=6, NotChecked=0, Total=1482 [2022-11-03 02:38:47,233 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 02:38:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:49,251 INFO L93 Difference]: Finished difference Result 174 states and 230 transitions. [2022-11-03 02:38:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:38:49,252 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 52 [2022-11-03 02:38:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:49,253 INFO L225 Difference]: With dead ends: 174 [2022-11-03 02:38:49,254 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 02:38:49,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=183, Invalid=1371, Unknown=6, NotChecked=0, Total=1560 [2022-11-03 02:38:49,255 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 80 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:49,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 328 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 613 Invalid, 0 Unknown, 295 Unchecked, 1.9s Time] [2022-11-03 02:38:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 02:38:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-11-03 02:38:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 53 states have (on average 1.169811320754717) internal successors, (62), 56 states have internal predecessors, (62), 30 states have call successors, (30), 10 states have call predecessors, (30), 11 states have return successors, (31), 28 states have call predecessors, (31), 29 states have call successors, (31) [2022-11-03 02:38:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 123 transitions. [2022-11-03 02:38:49,299 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 123 transitions. Word has length 52 [2022-11-03 02:38:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:49,300 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 123 transitions. [2022-11-03 02:38:49,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 02:38:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 123 transitions. [2022-11-03 02:38:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:38:49,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:49,302 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:49,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:49,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:49,515 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:49,516 INFO L85 PathProgramCache]: Analyzing trace with hash 212739364, now seen corresponding path program 1 times [2022-11-03 02:38:49,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:38:49,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450832715] [2022-11-03 02:38:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:49,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:38:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:39:00,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:00,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450832715] [2022-11-03 02:39:00,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450832715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:39:00,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292431216] [2022-11-03 02:39:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:00,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:00,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:00,198 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:00,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:39:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:00,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 185 conjunts are in the unsatisfiable core [2022-11-03 02:39:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:00,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-11-03 02:39:00,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2022-11-03 02:39:00,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:39:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:02,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 283 [2022-11-03 02:39:02,765 INFO L356 Elim1Store]: treesize reduction 76, result has 12.6 percent of original size [2022-11-03 02:39:02,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: v_arrayElimArr_2 input size 68 context size 68 output size 68 [2022-11-03 02:39:02,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [170147299] [2022-11-03 02:39:02,769 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-03 02:39:02,770 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:39:02,770 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:39:02,770 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:39:02,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:39:02,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:02,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:02,909 INFO L356 Elim1Store]: treesize reduction 102, result has 36.3 percent of original size [2022-11-03 02:39:02,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 83 [2022-11-03 02:39:02,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:02,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,080 INFO L356 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2022-11-03 02:39:03,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2022-11-03 02:39:03,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:39:03,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:39:03,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:39:03,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:39:03,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:39:03,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:39:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:39:03,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 02:39:05,489 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 154 for LOIs [2022-11-03 02:39:06,611 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_insert_before with input of size 176 for LOIs [2022-11-03 02:39:07,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,424 INFO L356 Elim1Store]: treesize reduction 272, result has 26.5 percent of original size [2022-11-03 02:39:07,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 621 treesize of output 475 [2022-11-03 02:39:07,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,636 INFO L356 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2022-11-03 02:39:07,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 172 [2022-11-03 02:39:07,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,878 INFO L356 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2022-11-03 02:39:07,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 76 [2022-11-03 02:39:07,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:07,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:39:07,972 INFO L356 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-03 02:39:07,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2022-11-03 02:39:08,216 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-11-03 02:39:08,221 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:39:08,223 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 21 for LOIs [2022-11-03 02:39:08,300 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 130 for LOIs [2022-11-03 02:39:08,332 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:39:08,412 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:39:20,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2993#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:39:20,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:39:20,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:39:20,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-03 02:39:20,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612116040] [2022-11-03 02:39:20,663 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:20,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:39:20,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:20,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:39:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=3525, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 02:39:20,666 INFO L87 Difference]: Start difference. First operand 95 states and 123 transitions. Second operand has 18 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-03 02:39:22,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:22,212 INFO L93 Difference]: Finished difference Result 168 states and 241 transitions. [2022-11-03 02:39:22,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:39:22,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 53 [2022-11-03 02:39:22,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:22,215 INFO L225 Difference]: With dead ends: 168 [2022-11-03 02:39:22,215 INFO L226 Difference]: Without dead ends: 166 [2022-11-03 02:39:22,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 16 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=296, Invalid=4396, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 02:39:22,217 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 92 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:22,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 1177 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:39:22,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-03 02:39:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 121. [2022-11-03 02:39:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 43 states have call successors, (43), 12 states have call predecessors, (43), 13 states have return successors, (44), 41 states have call predecessors, (44), 42 states have call successors, (44) [2022-11-03 02:39:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-11-03 02:39:22,265 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 53 [2022-11-03 02:39:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:22,265 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-11-03 02:39:22,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-03 02:39:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-11-03 02:39:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:39:22,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:22,267 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:22,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:22,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:22,485 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:22,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:22,485 INFO L85 PathProgramCache]: Analyzing trace with hash -172351455, now seen corresponding path program 1 times [2022-11-03 02:39:22,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:22,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050686909] [2022-11-03 02:39:22,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:22,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:39:23,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:23,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050686909] [2022-11-03 02:39:23,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050686909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:39:23,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081632961] [2022-11-03 02:39:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:23,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:23,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:23,606 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:23,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:39:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:24,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 02:39:24,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:24,117 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:39:24,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 02:39:24,135 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:39:24,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 02:39:36,514 WARN L234 SmtUtils]: Spent 8.32s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:39:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:39:37,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:39:41,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081632961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:41,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1426258244] [2022-11-03 02:39:41,499 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-03 02:39:41,499 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:39:41,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:39:41,500 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:39:41,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:39:41,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:41,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:41,677 INFO L356 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2022-11-03 02:39:41,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2022-11-03 02:39:41,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:41,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:41,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 24 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 51 [2022-11-03 02:39:42,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:39:42,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:39:42,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:39:42,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:39:42,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,291 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 02:39:42,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 26 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 82 [2022-11-03 02:39:42,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:39:42,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,468 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:39:42,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:39:42,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:39:42,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:42,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:39:42,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:39:42,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:42,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:42,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:42,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:42,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:43,261 INFO L356 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-03 02:39:43,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 774 treesize of output 783 [2022-11-03 02:39:43,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:43,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:43,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:43,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:43,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:43,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:43,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:43,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:43,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:43,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:43,855 INFO L356 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-03 02:39:43,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 788 treesize of output 797 [2022-11-03 02:39:44,472 INFO L356 Elim1Store]: treesize reduction 316, result has 17.9 percent of original size [2022-11-03 02:39:44,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 37 case distinctions, treesize of input 760 treesize of output 796 [2022-11-03 02:39:44,736 INFO L356 Elim1Store]: treesize reduction 196, result has 11.3 percent of original size [2022-11-03 02:39:44,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 753 treesize of output 766 [2022-11-03 02:39:44,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:44,817 INFO L356 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-03 02:39:44,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 790 treesize of output 743 [2022-11-03 02:39:44,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 764 treesize of output 743 [2022-11-03 02:39:53,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:53,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:39:53,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:53,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:39:53,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:53,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:39:53,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:53,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:53,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:39:53,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:53,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:39:53,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:39:53,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:39:53,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:53,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:39:53,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:53,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:53,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:39:53,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:53,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:39:53,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:53,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:39:54,781 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 02:39:55,583 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 183 for LOIs [2022-11-03 02:39:55,641 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 130 for LOIs [2022-11-03 02:39:55,668 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:39:55,729 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:40:20,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1426258244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:20,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:40:20,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [9, 9, 6] total 39 [2022-11-03 02:40:20,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934635029] [2022-11-03 02:40:20,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:20,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:40:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:40:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1323, Unknown=9, NotChecked=0, Total=1482 [2022-11-03 02:40:20,521 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 02:40:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:22,405 INFO L93 Difference]: Finished difference Result 214 states and 276 transitions. [2022-11-03 02:40:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:40:22,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 53 [2022-11-03 02:40:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:22,407 INFO L225 Difference]: With dead ends: 214 [2022-11-03 02:40:22,407 INFO L226 Difference]: Without dead ends: 136 [2022-11-03 02:40:22,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=165, Invalid=1465, Unknown=10, NotChecked=0, Total=1640 [2022-11-03 02:40:22,409 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:22,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 258 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 467 Invalid, 0 Unknown, 317 Unchecked, 1.2s Time] [2022-11-03 02:40:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-03 02:40:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2022-11-03 02:40:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 76 states have internal predecessors, (85), 44 states have call successors, (44), 14 states have call predecessors, (44), 14 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-03 02:40:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 172 transitions. [2022-11-03 02:40:22,449 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 172 transitions. Word has length 53 [2022-11-03 02:40:22,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:22,449 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 172 transitions. [2022-11-03 02:40:22,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 02:40:22,449 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 172 transitions. [2022-11-03 02:40:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:40:22,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:22,454 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:22,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:22,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:40:22,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:22,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:22,655 INFO L85 PathProgramCache]: Analyzing trace with hash -548953146, now seen corresponding path program 1 times [2022-11-03 02:40:22,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:22,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241522766] [2022-11-03 02:40:22,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:22,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:40:24,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:24,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241522766] [2022-11-03 02:40:24,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241522766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:24,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175838169] [2022-11-03 02:40:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:24,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:24,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:24,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:24,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:40:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:24,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 02:40:24,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:24,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:40:24,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:24,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 02:40:24,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:24,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2022-11-03 02:40:25,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:25,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:25,179 INFO L356 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-11-03 02:40:25,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 18 [2022-11-03 02:40:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:40:25,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:38,920 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:40:38,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 45 [2022-11-03 02:40:38,931 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:40:38,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-11-03 02:40:38,959 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:40:38,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 185 [2022-11-03 02:40:38,980 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:40:38,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 193 treesize of output 191 [2022-11-03 02:40:39,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 4 [2022-11-03 02:40:39,138 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:40:39,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 90 treesize of output 88 [2022-11-03 02:40:39,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2022-11-03 02:40:39,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 4 [2022-11-03 02:40:39,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 68 treesize of output 66 [2022-11-03 02:40:39,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 71 [2022-11-03 02:40:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:40:39,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175838169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:39,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268793066] [2022-11-03 02:40:39,498 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-03 02:40:39,498 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:40:39,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:40:39,499 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:40:39,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:40:39,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:39,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:39,699 INFO L356 Elim1Store]: treesize reduction 102, result has 36.3 percent of original size [2022-11-03 02:40:39,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 83 [2022-11-03 02:40:39,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:39,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:39,942 INFO L356 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2022-11-03 02:40:39,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2022-11-03 02:40:40,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:40:40,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:40:40,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:40:40,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:40:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:40,567 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:40:40,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:40:40,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:40:40,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:40:40,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:40,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:40,709 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:40:40,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:40:40,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,874 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:40:40,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:40:40,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:40,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 31 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 62 [2022-11-03 02:40:40,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:41,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:41,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:40:41,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:41,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:40:41,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:41,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:40:41,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:41,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:40:41,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:40:41,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:40:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:41,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:40:41,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:41,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:40:41,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:41,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:41,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:40:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:41,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:40:44,388 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 02:40:45,146 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_insert_before with input of size 70 for LOIs [2022-11-03 02:40:45,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:45,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:45,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:45,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:45,794 INFO L356 Elim1Store]: treesize reduction 272, result has 26.5 percent of original size [2022-11-03 02:40:45,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 621 treesize of output 475 [2022-11-03 02:40:45,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:45,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:45,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:45,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:45,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,110 INFO L356 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2022-11-03 02:40:46,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 172 [2022-11-03 02:40:46,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,414 INFO L356 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2022-11-03 02:40:46,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 76 [2022-11-03 02:40:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,565 INFO L356 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2022-11-03 02:40:46,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 76 [2022-11-03 02:40:46,729 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-11-03 02:40:46,735 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:40:46,737 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 21 for LOIs [2022-11-03 02:40:46,797 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 130 for LOIs [2022-11-03 02:40:46,825 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:40:46,893 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:40:57,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4708#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:40:57,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:40:57,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:40:57,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2022-11-03 02:40:57,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695225488] [2022-11-03 02:40:57,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:57,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:40:57,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:40:57,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3674, Unknown=3, NotChecked=0, Total=3906 [2022-11-03 02:40:57,404 INFO L87 Difference]: Start difference. First operand 133 states and 172 transitions. Second operand has 31 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 30 states have internal predecessors, (62), 10 states have call successors, (26), 3 states have call predecessors, (26), 6 states have return successors, (24), 7 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-03 02:40:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:59,289 INFO L93 Difference]: Finished difference Result 257 states and 348 transitions. [2022-11-03 02:40:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:40:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 30 states have internal predecessors, (62), 10 states have call successors, (26), 3 states have call predecessors, (26), 6 states have return successors, (24), 7 states have call predecessors, (24), 10 states have call successors, (24) Word has length 54 [2022-11-03 02:40:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:59,292 INFO L225 Difference]: With dead ends: 257 [2022-11-03 02:40:59,292 INFO L226 Difference]: Without dead ends: 185 [2022-11-03 02:40:59,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 110 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=358, Invalid=5189, Unknown=3, NotChecked=0, Total=5550 [2022-11-03 02:40:59,295 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 169 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:59,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 1626 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 683 Invalid, 0 Unknown, 257 Unchecked, 1.1s Time] [2022-11-03 02:40:59,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-03 02:40:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 139. [2022-11-03 02:40:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 80 states have internal predecessors, (88), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-03 02:40:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 177 transitions. [2022-11-03 02:40:59,340 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 177 transitions. Word has length 54 [2022-11-03 02:40:59,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:59,340 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 177 transitions. [2022-11-03 02:40:59,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 30 states have internal predecessors, (62), 10 states have call successors, (26), 3 states have call predecessors, (26), 6 states have return successors, (24), 7 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-03 02:40:59,340 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 177 transitions. [2022-11-03 02:40:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 02:40:59,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:59,342 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:59,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:59,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:59,546 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:59,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:59,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1130683781, now seen corresponding path program 2 times [2022-11-03 02:40:59,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:59,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895279980] [2022-11-03 02:40:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:59,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:41:04,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:04,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895279980] [2022-11-03 02:41:04,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895279980] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:04,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328510383] [2022-11-03 02:41:04,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:41:04,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:04,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:04,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:04,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:41:07,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:41:07,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:07,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 181 conjunts are in the unsatisfiable core [2022-11-03 02:41:07,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:07,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-03 02:41:07,508 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:41:07,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:41:07,905 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-03 02:41:07,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 02:41:07,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:07,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:41:07,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:41:10,025 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_43| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_43|) 24) |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_43|))) is different from true [2022-11-03 02:41:12,133 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_44| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_44|) 24) |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_44|))) is different from true [2022-11-03 02:41:14,210 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_45| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_45| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_45|) 24)))) is different from true [2022-11-03 02:41:16,382 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_30 Int)) (not (= v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_30 (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_30) 24)))) is different from true [2022-11-03 02:41:18,458 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_31 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_31) 24) v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_31))) is different from true [2022-11-03 02:41:20,552 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_32 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_32) 24) v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_32))) is different from true [2022-11-03 02:41:20,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:20,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:41:20,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 102 [2022-11-03 02:41:20,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:20,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:20,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2022-11-03 02:41:20,732 INFO L356 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2022-11-03 02:41:20,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: v_arrayElimArr_8 input size 62 context size 62 output size 62 [2022-11-03 02:41:20,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1517617381] [2022-11-03 02:41:20,735 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-03 02:41:20,736 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:41:20,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:41:20,736 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:41:20,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:41:20,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:20,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:20,895 INFO L356 Elim1Store]: treesize reduction 102, result has 36.3 percent of original size [2022-11-03 02:41:20,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 83 [2022-11-03 02:41:20,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:20,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,082 INFO L356 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2022-11-03 02:41:21,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2022-11-03 02:41:21,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:41:21,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:41:21,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:41:21,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:41:21,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:41:21,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:41:21,639 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:41:21,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:41:21,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:41:21,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,838 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:41:21,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:41:21,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 31 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 62 [2022-11-03 02:41:21,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:41:21,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:41:21,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:41:22,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:41:22,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:41:22,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:41:22,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:41:22,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:41:22,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:41:22,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:41:22,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:41:22,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:41:22,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:41:22,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:41:22,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:41:22,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:41:22,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:41:22,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:41:22,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:41:22,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:22,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:41:25,214 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 02:41:25,946 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_insert_before with input of size 70 for LOIs [2022-11-03 02:41:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:26,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:26,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:26,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:26,552 INFO L356 Elim1Store]: treesize reduction 272, result has 26.5 percent of original size [2022-11-03 02:41:26,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 621 treesize of output 475 [2022-11-03 02:41:26,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:26,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:26,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:26,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:26,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:26,855 INFO L356 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2022-11-03 02:41:26,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 172 [2022-11-03 02:41:26,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:26,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:41:26,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:27,023 INFO L356 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2022-11-03 02:41:27,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 47 [2022-11-03 02:41:27,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:27,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:27,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:27,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 53 [2022-11-03 02:41:27,104 INFO L356 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-03 02:41:27,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2022-11-03 02:41:27,258 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-11-03 02:41:27,265 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 31 for LOIs [2022-11-03 02:41:27,270 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 21 for LOIs [2022-11-03 02:41:27,325 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 130 for LOIs [2022-11-03 02:41:27,349 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:41:27,414 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:41:37,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5547#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:41:37,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:41:37,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:41:37,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-03 02:41:37,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422776037] [2022-11-03 02:41:37,040 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:37,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:41:37,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:41:37,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2290, Unknown=6, NotChecked=606, Total=3080 [2022-11-03 02:41:37,042 INFO L87 Difference]: Start difference. First operand 139 states and 177 transitions. Second operand has 12 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 02:41:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:37,860 INFO L93 Difference]: Finished difference Result 145 states and 182 transitions. [2022-11-03 02:41:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:41:37,861 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 60 [2022-11-03 02:41:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:37,862 INFO L225 Difference]: With dead ends: 145 [2022-11-03 02:41:37,862 INFO L226 Difference]: Without dead ends: 143 [2022-11-03 02:41:37,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 57 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=200, Invalid=2788, Unknown=6, NotChecked=666, Total=3660 [2022-11-03 02:41:37,864 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 27 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:37,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 521 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:41:37,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-03 02:41:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 117. [2022-11-03 02:41:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 72 states have internal predecessors, (80), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-03 02:41:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2022-11-03 02:41:37,904 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 60 [2022-11-03 02:41:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:37,905 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2022-11-03 02:41:37,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 02:41:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2022-11-03 02:41:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:41:37,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:37,906 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:37,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:38,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:38,119 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:38,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:38,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1333378944, now seen corresponding path program 1 times [2022-11-03 02:41:38,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:38,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737290214] [2022-11-03 02:41:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:38,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:41:47,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:47,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737290214] [2022-11-03 02:41:47,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737290214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:47,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:47,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-03 02:41:47,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065179633] [2022-11-03 02:41:47,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:47,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:41:47,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:41:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:41:47,483 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand has 13 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:41:48,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:48,801 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2022-11-03 02:41:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:41:48,802 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 62 [2022-11-03 02:41:48,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:48,803 INFO L225 Difference]: With dead ends: 162 [2022-11-03 02:41:48,803 INFO L226 Difference]: Without dead ends: 160 [2022-11-03 02:41:48,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:41:48,804 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 29 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:48,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 812 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:41:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-03 02:41:48,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2022-11-03 02:41:48,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 81 states have (on average 1.123456790123457) internal successors, (91), 83 states have internal predecessors, (91), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-03 02:41:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 180 transitions. [2022-11-03 02:41:48,861 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 180 transitions. Word has length 62 [2022-11-03 02:41:48,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:48,862 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 180 transitions. [2022-11-03 02:41:48,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:41:48,862 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 180 transitions. [2022-11-03 02:41:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:41:48,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:48,864 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:48,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:41:48,864 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:48,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1009036023, now seen corresponding path program 1 times [2022-11-03 02:41:48,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:48,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512728071] [2022-11-03 02:41:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:48,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:41:56,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512728071] [2022-11-03 02:41:56,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512728071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896863372] [2022-11-03 02:41:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:56,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:56,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:56,715 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:56,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:41:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:57,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 177 conjunts are in the unsatisfiable core [2022-11-03 02:41:57,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:57,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2022-11-03 02:41:57,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:57,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:57,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:41:57,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:41:59,662 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_57| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_57|) 24))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_57|) (<= 2 |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_57|) (not (= .cse0 0))))) is different from true [2022-11-03 02:42:12,406 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_58| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_58|) 24))) (and (<= (+ 2 .cse0) |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_58|) (<= 2 |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_58|) (not (= .cse0 0))))) is different from true [2022-11-03 02:42:16,649 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_59| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_59|) 24))) (and (<= (+ 2 .cse0) |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_59|) (not (= .cse0 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_59|)))) is different from true [2022-11-03 02:42:18,997 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_46 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_46) 24))) (and (not (= .cse0 0)) (<= (+ 2 .cse0) v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_46) (<= 2 v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_46)))) is different from true [2022-11-03 02:42:21,176 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_47 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_47) 24))) (and (not (= .cse0 0)) (<= (+ 2 .cse0) v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_47) (<= 2 v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_47)))) is different from true [2022-11-03 02:42:23,356 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_48 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_48) 24))) (and (<= (+ 2 .cse0) v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_48) (<= 2 v_aws_linked_list_insert_before_~before.base_BEFORE_CALL_48) (not (= .cse0 0))))) is different from true [2022-11-03 02:42:23,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:23,564 INFO L356 Elim1Store]: treesize reduction 41, result has 10.9 percent of original size [2022-11-03 02:42:23,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 276 treesize of output 248 [2022-11-03 02:42:23,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:23,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:23,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:23,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:23,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 100 [2022-11-03 02:42:23,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:23,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:23,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 107 [2022-11-03 02:42:23,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 9 [2022-11-03 02:42:23,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 68 treesize of output 71 [2022-11-03 02:42:23,673 INFO L356 Elim1Store]: treesize reduction 90, result has 18.9 percent of original size [2022-11-03 02:42:23,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: v_arrayElimArr_12 input size 65 context size 65 output size 65 [2022-11-03 02:42:23,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585913290] [2022-11-03 02:42:23,677 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-03 02:42:23,677 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:42:23,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:42:23,678 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:42:23,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:42:23,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:23,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:23,853 INFO L356 Elim1Store]: treesize reduction 102, result has 36.3 percent of original size [2022-11-03 02:42:23,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 83 [2022-11-03 02:42:23,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:23,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,068 INFO L356 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2022-11-03 02:42:24,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2022-11-03 02:42:24,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:42:24,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:42:24,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:42:24,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:42:24,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:42:24,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:42:24,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:42:24,607 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:42:24,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:42:24,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,737 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 02:42:24,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 26 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 82 [2022-11-03 02:42:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:42:24,815 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:42:24,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:42:24,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:42:24,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:25,021 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:42:25,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:42:25,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:42:25,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:25,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:42:25,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:25,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:42:25,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:42:25,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:25,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:42:25,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:25,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:42:25,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:42:25,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:25,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:42:25,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:25,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:25,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:42:25,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:25,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:42:25,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:25,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:42:28,018 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 02:42:28,723 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_insert_before with input of size 70 for LOIs [2022-11-03 02:42:28,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:28,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:28,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:29,284 INFO L356 Elim1Store]: treesize reduction 272, result has 26.5 percent of original size [2022-11-03 02:42:29,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 621 treesize of output 475 [2022-11-03 02:42:29,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:29,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:29,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:29,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:29,533 INFO L356 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2022-11-03 02:42:29,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 172 [2022-11-03 02:42:29,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:29,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:29,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:29,766 INFO L356 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2022-11-03 02:42:29,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 76 [2022-11-03 02:42:29,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:29,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:29,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:29,893 INFO L356 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2022-11-03 02:42:29,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 76 [2022-11-03 02:42:30,150 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-11-03 02:42:30,157 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:42:30,158 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 63 for LOIs [2022-11-03 02:42:30,228 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 130 for LOIs [2022-11-03 02:42:30,278 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:42:30,340 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:43:01,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6655#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:43:01,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:43:01,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:01,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-03 02:43:01,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637218399] [2022-11-03 02:43:01,227 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:01,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:43:01,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:01,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:43:01,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3450, Unknown=16, NotChecked=738, Total=4422 [2022-11-03 02:43:01,230 INFO L87 Difference]: Start difference. First operand 143 states and 180 transitions. Second operand has 13 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:43:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:02,780 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2022-11-03 02:43:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:43:02,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 69 [2022-11-03 02:43:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:02,782 INFO L225 Difference]: With dead ends: 166 [2022-11-03 02:43:02,782 INFO L226 Difference]: Without dead ends: 164 [2022-11-03 02:43:02,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=242, Invalid=4056, Unknown=16, NotChecked=798, Total=5112 [2022-11-03 02:43:02,785 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 28 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:02,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1093 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:43:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-03 02:43:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 121. [2022-11-03 02:43:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 75 states have internal predecessors, (83), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-03 02:43:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 146 transitions. [2022-11-03 02:43:02,819 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 146 transitions. Word has length 69 [2022-11-03 02:43:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:02,820 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 146 transitions. [2022-11-03 02:43:02,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:43:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 146 transitions. [2022-11-03 02:43:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:43:02,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:02,821 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:02,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:03,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:43:03,028 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash -408258507, now seen corresponding path program 1 times [2022-11-03 02:43:03,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:03,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677362975] [2022-11-03 02:43:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:03,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:43:10,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:10,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677362975] [2022-11-03 02:43:10,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677362975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:10,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:10,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-03 02:43:10,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305510891] [2022-11-03 02:43:10,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:10,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:43:10,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:10,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:43:10,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:43:10,011 INFO L87 Difference]: Start difference. First operand 121 states and 146 transitions. Second operand has 13 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-03 02:43:11,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:11,132 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2022-11-03 02:43:11,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:43:11,132 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 71 [2022-11-03 02:43:11,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:11,135 INFO L225 Difference]: With dead ends: 166 [2022-11-03 02:43:11,135 INFO L226 Difference]: Without dead ends: 164 [2022-11-03 02:43:11,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:43:11,138 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 36 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:11,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 785 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:43:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-03 02:43:11,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2022-11-03 02:43:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 84 states have (on average 1.119047619047619) internal successors, (94), 86 states have internal predecessors, (94), 45 states have call successors, (45), 17 states have call predecessors, (45), 17 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-03 02:43:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 183 transitions. [2022-11-03 02:43:11,211 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 183 transitions. Word has length 71 [2022-11-03 02:43:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:11,212 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 183 transitions. [2022-11-03 02:43:11,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-03 02:43:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 183 transitions. [2022-11-03 02:43:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 02:43:11,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:11,214 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:11,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:43:11,214 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:11,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:11,215 INFO L85 PathProgramCache]: Analyzing trace with hash -416333337, now seen corresponding path program 1 times [2022-11-03 02:43:11,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:11,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500012049] [2022-11-03 02:43:11,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:11,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:43:11,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:11,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500012049] [2022-11-03 02:43:11,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500012049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:11,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:11,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:43:11,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144992856] [2022-11-03 02:43:11,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:11,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:43:11,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:43:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:11,936 INFO L87 Difference]: Start difference. First operand 147 states and 183 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:43:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:12,229 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2022-11-03 02:43:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:43:12,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 77 [2022-11-03 02:43:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:12,231 INFO L225 Difference]: With dead ends: 153 [2022-11-03 02:43:12,231 INFO L226 Difference]: Without dead ends: 151 [2022-11-03 02:43:12,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:12,232 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 16 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:12,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 405 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:43:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-03 02:43:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-03 02:43:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 89 states have internal predecessors, (97), 45 states have call successors, (45), 18 states have call predecessors, (45), 18 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-03 02:43:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2022-11-03 02:43:12,277 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 77 [2022-11-03 02:43:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:12,277 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2022-11-03 02:43:12,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:43:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2022-11-03 02:43:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 02:43:12,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:12,279 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:12,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:43:12,279 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:12,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1008299468, now seen corresponding path program 1 times [2022-11-03 02:43:12,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:12,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774046040] [2022-11-03 02:43:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:12,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:43:23,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:23,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774046040] [2022-11-03 02:43:23,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774046040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:23,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756194369] [2022-11-03 02:43:23,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:23,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:23,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:23,208 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:23,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:43:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:23,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 207 conjunts are in the unsatisfiable core [2022-11-03 02:43:23,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:23,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-11-03 02:43:24,145 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-03 02:43:24,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-03 02:43:24,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:43:24,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:43:24,229 INFO L356 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-03 02:43:24,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 35 [2022-11-03 02:43:24,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 17 [2022-11-03 02:43:25,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 327 treesize of output 299 [2022-11-03 02:43:25,240 INFO L356 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2022-11-03 02:43:25,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: v_arrayElimArr_19 input size 79 context size 79 output size 79 [2022-11-03 02:43:25,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1208763576] [2022-11-03 02:43:25,243 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2022-11-03 02:43:25,243 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:43:25,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:43:25,244 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:43:25,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:43:25,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,429 INFO L356 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2022-11-03 02:43:25,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2022-11-03 02:43:25,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 24 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 51 [2022-11-03 02:43:25,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:43:25,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:43:25,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:43:25,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:43:25,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:25,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:25,937 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:43:25,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:43:25,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:43:25,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:25,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:26,049 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:43:26,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:43:26,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:43:26,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,271 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 02:43:26,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 26 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 82 [2022-11-03 02:43:26,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,459 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:43:26,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:43:26,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:43:26,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:43:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:43:26,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:43:26,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:43:26,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:26,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:43:26,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:43:26,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:43:26,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:43:26,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:26,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:43:29,479 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 02:43:30,151 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_insert_before with input of size 70 for LOIs [2022-11-03 02:43:30,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:30,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:30,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:30,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:30,768 INFO L356 Elim1Store]: treesize reduction 272, result has 26.5 percent of original size [2022-11-03 02:43:30,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 621 treesize of output 475 [2022-11-03 02:43:30,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:30,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:30,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:30,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:30,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:31,003 INFO L356 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2022-11-03 02:43:31,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 172 [2022-11-03 02:43:31,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:31,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:43:31,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:31,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:43:31,139 INFO L356 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-03 02:43:31,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2022-11-03 02:43:31,195 INFO L356 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-03 02:43:31,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2022-11-03 02:43:31,557 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-11-03 02:43:31,564 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:43:31,566 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 63 for LOIs [2022-11-03 02:43:31,638 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 130 for LOIs [2022-11-03 02:43:31,661 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 35 for LOIs [2022-11-03 02:43:31,735 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:43:44,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8285#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:43:44,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:43:44,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:44,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-11-03 02:43:44,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999941149] [2022-11-03 02:43:44,765 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:44,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:43:44,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:44,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:43:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=5294, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:43:44,769 INFO L87 Difference]: Start difference. First operand 151 states and 186 transitions. Second operand has 25 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 9 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-03 02:43:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:49,715 INFO L93 Difference]: Finished difference Result 255 states and 347 transitions. [2022-11-03 02:43:49,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 02:43:49,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 9 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 78 [2022-11-03 02:43:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:49,717 INFO L225 Difference]: With dead ends: 255 [2022-11-03 02:43:49,718 INFO L226 Difference]: Without dead ends: 253 [2022-11-03 02:43:49,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=370, Invalid=7640, Unknown=0, NotChecked=0, Total=8010 [2022-11-03 02:43:49,721 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 120 mSDsluCounter, 1914 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:49,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1899 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2104 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 02:43:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-03 02:43:49,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 159. [2022-11-03 02:43:49,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 93 states have (on average 1.118279569892473) internal successors, (104), 96 states have internal predecessors, (104), 46 states have call successors, (46), 18 states have call predecessors, (46), 19 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-11-03 02:43:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 196 transitions. [2022-11-03 02:43:49,782 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 196 transitions. Word has length 78 [2022-11-03 02:43:49,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:49,782 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 196 transitions. [2022-11-03 02:43:49,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 9 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-03 02:43:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 196 transitions. [2022-11-03 02:43:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 02:43:49,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:49,784 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:49,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:50,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:43:50,011 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:50,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1283022209, now seen corresponding path program 2 times [2022-11-03 02:43:50,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:50,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772011776] [2022-11-03 02:43:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:50,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:43:52,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:52,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772011776] [2022-11-03 02:43:52,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772011776] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:52,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605272677] [2022-11-03 02:43:52,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:43:52,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:52,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:52,723 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:52,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:43:53,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:43:53,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:43:53,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:43:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:56,229 INFO L356 Elim1Store]: treesize reduction 294, result has 35.7 percent of original size [2022-11-03 02:43:56,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_125| input size 267 context size 267 output size 267 [2022-11-03 02:43:56,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1532235044] [2022-11-03 02:43:56,233 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2022-11-03 02:43:56,233 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:43:56,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:43:56,234 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:43:56,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:43:56,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,475 INFO L356 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2022-11-03 02:43:56,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2022-11-03 02:43:56,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 24 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 51 [2022-11-03 02:43:56,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:43:56,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:43:56,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:43:56,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:43:56,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:56,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,058 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 02:43:57,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 26 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 82 [2022-11-03 02:43:57,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:43:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:57,162 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:43:57,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:43:57,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,309 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:43:57,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:43:57,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:43:57,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:57,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:43:57,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:43:57,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:43:57,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:57,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:43:57,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:43:57,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:43:57,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:43:57,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:43:57,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:43:57,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:43:57,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:43:57,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:43:57,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:57,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:43:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:43:57,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:43:57,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:43:57,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:57,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:44:00,583 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 02:44:01,263 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_insert_before with input of size 70 for LOIs [2022-11-03 02:44:01,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:01,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:01,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:01,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:01,812 INFO L356 Elim1Store]: treesize reduction 272, result has 26.5 percent of original size [2022-11-03 02:44:01,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 621 treesize of output 475 [2022-11-03 02:44:01,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:01,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:01,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:01,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:01,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:02,057 INFO L356 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2022-11-03 02:44:02,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 172 [2022-11-03 02:44:02,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:02,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:02,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:02,303 INFO L356 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2022-11-03 02:44:02,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 76 [2022-11-03 02:44:02,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:02,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:44:02,384 INFO L356 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-03 02:44:02,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2022-11-03 02:44:02,784 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-11-03 02:44:02,791 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:44:02,793 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 63 for LOIs [2022-11-03 02:44:02,867 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 130 for LOIs [2022-11-03 02:44:02,894 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 35 for LOIs [2022-11-03 02:44:02,961 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:44:13,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9160#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:44:13,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:44:13,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:44:13,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-03 02:44:13,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677560859] [2022-11-03 02:44:13,677 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:13,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:44:13,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:13,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:44:13,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2779, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:44:13,680 INFO L87 Difference]: Start difference. First operand 159 states and 196 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-03 02:44:15,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:15,733 INFO L93 Difference]: Finished difference Result 322 states and 420 transitions. [2022-11-03 02:44:15,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:44:15,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 84 [2022-11-03 02:44:15,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:15,735 INFO L225 Difference]: With dead ends: 322 [2022-11-03 02:44:15,735 INFO L226 Difference]: Without dead ends: 244 [2022-11-03 02:44:15,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=245, Invalid=3787, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 02:44:15,738 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 134 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:15,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 941 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:44:15,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-03 02:44:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2022-11-03 02:44:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 100 states have (on average 1.13) internal successors, (113), 105 states have internal predecessors, (113), 48 states have call successors, (48), 18 states have call predecessors, (48), 20 states have return successors, (50), 45 states have call predecessors, (50), 47 states have call successors, (50) [2022-11-03 02:44:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 211 transitions. [2022-11-03 02:44:15,812 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 211 transitions. Word has length 84 [2022-11-03 02:44:15,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:15,813 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 211 transitions. [2022-11-03 02:44:15,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-03 02:44:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 211 transitions. [2022-11-03 02:44:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 02:44:15,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:15,815 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:15,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:16,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:44:16,031 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1421380255, now seen corresponding path program 3 times [2022-11-03 02:44:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040472899] [2022-11-03 02:44:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:16,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-03 02:44:23,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:23,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040472899] [2022-11-03 02:44:23,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040472899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:44:23,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964091046] [2022-11-03 02:44:23,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:44:23,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:23,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:23,553 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:23,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:44:24,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:44:24,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:44:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 262 conjunts are in the unsatisfiable core [2022-11-03 02:44:24,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:24,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-11-03 02:44:24,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:44:24,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:44:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:24,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 02:44:24,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:44:24,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:24,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 02:44:24,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:24,755 INFO L356 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-11-03 02:44:24,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 60 [2022-11-03 02:44:24,770 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-03 02:44:24,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 02:44:24,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:24,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-11-03 02:44:24,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:24,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:24,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-11-03 02:44:24,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:24,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:24,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2022-11-03 02:44:24,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:24,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:24,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 37 [2022-11-03 02:44:24,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 38 treesize of output 36 [2022-11-03 02:44:28,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:28,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:28,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:28,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:28,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:28,562 INFO L356 Elim1Store]: treesize reduction 225, result has 23.2 percent of original size [2022-11-03 02:44:28,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 5 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 27 case distinctions, treesize of input 134 treesize of output 138 [2022-11-03 02:44:52,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:52,413 INFO L356 Elim1Store]: treesize reduction 39, result has 11.4 percent of original size [2022-11-03 02:44:52,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 269 treesize of output 219 [2022-11-03 02:44:52,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:52,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:52,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2022-11-03 02:44:52,630 INFO L356 Elim1Store]: treesize reduction 144, result has 21.3 percent of original size [2022-11-03 02:44:52,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: v_arrayElimArr_31 input size 100 context size 100 output size 100 [2022-11-03 02:44:52,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [902004921] [2022-11-03 02:44:52,633 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2022-11-03 02:44:52,634 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:44:52,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:44:52,634 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:44:52,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:44:52,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:52,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:52,838 INFO L356 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2022-11-03 02:44:52,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2022-11-03 02:44:52,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:52,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:52,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 24 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 51 [2022-11-03 02:44:53,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:44:53,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:44:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:44:53,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:44:53,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,409 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:44:53,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:44:53,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:44:53,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:44:53,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 31 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 62 [2022-11-03 02:44:53,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:44:53,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:53,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:44:53,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:53,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:53,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:53,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:53,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:53,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:54,373 INFO L356 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-03 02:44:54,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 778 treesize of output 787 [2022-11-03 02:44:55,327 INFO L356 Elim1Store]: treesize reduction 312, result has 19.0 percent of original size [2022-11-03 02:44:55,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 37 case distinctions, treesize of input 762 treesize of output 802 [2022-11-03 02:44:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:55,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:55,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:55,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:55,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:55,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:55,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:55,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:55,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:55,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:55,791 INFO L356 Elim1Store]: treesize reduction 233, result has 25.6 percent of original size [2022-11-03 02:44:55,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 802 treesize of output 805 [2022-11-03 02:44:56,049 INFO L356 Elim1Store]: treesize reduction 182, result has 9.9 percent of original size [2022-11-03 02:44:56,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 case distinctions, treesize of input 757 treesize of output 770 [2022-11-03 02:44:56,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:56,146 INFO L356 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-03 02:44:56,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 794 treesize of output 747 [2022-11-03 02:44:56,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 768 treesize of output 747 [2022-11-03 02:45:05,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:05,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:45:06,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:45:06,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:06,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:45:06,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:06,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:45:06,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:06,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:45:06,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:06,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:45:06,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:45:06,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:45:06,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:06,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:06,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:45:06,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:06,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:45:06,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:06,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:45:06,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:06,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:45:07,710 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 02:45:08,410 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_insert_before with input of size 70 for LOIs [2022-11-03 02:45:08,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:08,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:08,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:08,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:09,035 INFO L356 Elim1Store]: treesize reduction 272, result has 26.5 percent of original size [2022-11-03 02:45:09,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 621 treesize of output 475 [2022-11-03 02:45:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:09,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:09,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:09,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:09,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:09,323 INFO L356 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2022-11-03 02:45:09,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 172 [2022-11-03 02:45:09,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:09,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:45:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:09,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:09,546 INFO L356 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2022-11-03 02:45:09,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 76 [2022-11-03 02:45:09,605 INFO L356 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-03 02:45:09,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2022-11-03 02:45:09,961 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-11-03 02:45:09,968 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:45:09,970 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 63 for LOIs [2022-11-03 02:45:10,043 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 130 for LOIs [2022-11-03 02:45:10,067 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 35 for LOIs [2022-11-03 02:45:10,136 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:45:23,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10163#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:45:23,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:45:23,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:23,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-03 02:45:23,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166020346] [2022-11-03 02:45:23,622 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:23,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:45:23,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:23,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:45:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=5874, Unknown=1, NotChecked=0, Total=6162 [2022-11-03 02:45:23,625 INFO L87 Difference]: Start difference. First operand 169 states and 211 transitions. Second operand has 17 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-03 02:45:25,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:25,359 INFO L93 Difference]: Finished difference Result 175 states and 216 transitions. [2022-11-03 02:45:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:45:25,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 85 [2022-11-03 02:45:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:25,361 INFO L225 Difference]: With dead ends: 175 [2022-11-03 02:45:25,361 INFO L226 Difference]: Without dead ends: 173 [2022-11-03 02:45:25,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 70 SyntacticMatches, 17 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2947 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=334, Invalid=7147, Unknown=1, NotChecked=0, Total=7482 [2022-11-03 02:45:25,363 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 34 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:25,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 551 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:45:25,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-03 02:45:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 143. [2022-11-03 02:45:25,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 89 states have (on average 1.146067415730337) internal successors, (102), 93 states have internal predecessors, (102), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 32 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-03 02:45:25,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 172 transitions. [2022-11-03 02:45:25,428 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 172 transitions. Word has length 85 [2022-11-03 02:45:25,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:25,428 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 172 transitions. [2022-11-03 02:45:25,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-03 02:45:25,429 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 172 transitions. [2022-11-03 02:45:25,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 02:45:25,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:25,430 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:25,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:25,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:25,643 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1110345996, now seen corresponding path program 1 times [2022-11-03 02:45:25,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:25,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989059567] [2022-11-03 02:45:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:25,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:45:40,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:40,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989059567] [2022-11-03 02:45:40,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989059567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:40,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980569307] [2022-11-03 02:45:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:40,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:40,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:40,205 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:40,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:45:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:40,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 213 conjunts are in the unsatisfiable core [2022-11-03 02:45:40,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:40,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2022-11-03 02:45:41,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 8 [2022-11-03 02:45:41,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:45:41,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2022-11-03 02:45:41,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:46:07,200 WARN L234 SmtUtils]: Spent 21.49s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:48:37,522 WARN L234 SmtUtils]: Spent 2.45m on a formula simplification. DAG size of input: 329 DAG size of output: 126 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:48:37,523 INFO L356 Elim1Store]: treesize reduction 2562, result has 16.7 percent of original size [2022-11-03 02:48:37,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_old(#memory_$Pointer$.base)_BEFORE_CALL_25| input size 677 context size 677 output size 677 [2022-11-03 02:48:37,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95564095] [2022-11-03 02:48:37,527 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2022-11-03 02:48:37,527 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:48:37,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:48:37,528 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:48:37,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:48:37,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:37,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:37,694 INFO L356 Elim1Store]: treesize reduction 102, result has 36.3 percent of original size [2022-11-03 02:48:37,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 83 [2022-11-03 02:48:37,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:37,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:37,917 INFO L356 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2022-11-03 02:48:37,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2022-11-03 02:48:38,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:48:38,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:48:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:48:38,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:48:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:48:38,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 02:48:38,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:48:38,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:48:51,112 WARN L234 SmtUtils]: Spent 11.24s on a formula simplification. DAG size of input: 119 DAG size of output: 70 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:48:51,112 INFO L356 Elim1Store]: treesize reduction 1325, result has 23.5 percent of original size [2022-11-03 02:48:51,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:51,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:48:51,314 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: |v_#memory_$Pointer$.base_146| input size 222 context size 222 output size 222 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:85) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:71) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:48:51,317 INFO L158 Benchmark]: Toolchain (without parser) took 657586.97ms. Allocated memory was 130.0MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 88.7MB in the beginning and 1.1GB in the end (delta: -985.0MB). Peak memory consumption was 268.4MB. Max. memory is 16.1GB. [2022-11-03 02:48:51,318 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 130.0MB. Free memory is still 111.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:48:51,318 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2270.47ms. Allocated memory was 130.0MB in the beginning and 190.8MB in the end (delta: 60.8MB). Free memory was 88.5MB in the beginning and 145.4MB in the end (delta: -56.9MB). Peak memory consumption was 68.3MB. Max. memory is 16.1GB. [2022-11-03 02:48:51,318 INFO L158 Benchmark]: Boogie Procedure Inliner took 134.01ms. Allocated memory is still 190.8MB. Free memory was 145.4MB in the beginning and 140.2MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:48:51,318 INFO L158 Benchmark]: Boogie Preprocessor took 45.72ms. Allocated memory is still 190.8MB. Free memory was 140.2MB in the beginning and 137.0MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:48:51,318 INFO L158 Benchmark]: RCFGBuilder took 1086.89ms. Allocated memory is still 190.8MB. Free memory was 137.0MB in the beginning and 90.9MB in the end (delta: 46.1MB). Peak memory consumption was 46.1MB. Max. memory is 16.1GB. [2022-11-03 02:48:51,318 INFO L158 Benchmark]: TraceAbstraction took 654038.41ms. Allocated memory was 190.8MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 90.9MB in the beginning and 1.1GB in the end (delta: -982.7MB). Peak memory consumption was 210.5MB. Max. memory is 16.1GB. [2022-11-03 02:48:51,319 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 130.0MB. Free memory is still 111.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2270.47ms. Allocated memory was 130.0MB in the beginning and 190.8MB in the end (delta: 60.8MB). Free memory was 88.5MB in the beginning and 145.4MB in the end (delta: -56.9MB). Peak memory consumption was 68.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 134.01ms. Allocated memory is still 190.8MB. Free memory was 145.4MB in the beginning and 140.2MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.72ms. Allocated memory is still 190.8MB. Free memory was 140.2MB in the beginning and 137.0MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1086.89ms. Allocated memory is still 190.8MB. Free memory was 137.0MB in the beginning and 90.9MB in the end (delta: 46.1MB). Peak memory consumption was 46.1MB. Max. memory is 16.1GB. * TraceAbstraction took 654038.41ms. Allocated memory was 190.8MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 90.9MB in the beginning and 1.1GB in the end (delta: -982.7MB). Peak memory consumption was 210.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_146| input size 222 context size 222 output size 222 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_146| input size 222 context size 222 output size 222: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:48:51,552 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-11-03 02:48:51,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI --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 d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 --- 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-5e519f3 [2022-11-03 02:48:53,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:48:53,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:48:53,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:48:53,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:48:53,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:48:53,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:48:53,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:48:53,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:48:53,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:48:53,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:48:53,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:48:53,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:48:53,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:48:53,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:48:53,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:48:53,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:48:53,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:48:53,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:48:53,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:48:53,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:48:53,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:48:53,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:48:53,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:48:53,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:48:53,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:48:53,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:48:53,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:48:53,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:48:53,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:48:53,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:48:53,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:48:53,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:48:53,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:48:53,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:48:53,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:48:53,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:48:53,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:48:53,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:48:53,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:48:53,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:48:53,903 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:48:53,946 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:48:53,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:48:53,950 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:48:53,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:48:53,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:48:53,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:48:53,953 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:48:53,953 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:48:53,953 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:48:53,953 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:48:53,955 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:48:53,955 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:48:53,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:48:53,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:48:53,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:48:53,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:48:53,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:48:53,958 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:48:53,958 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:48:53,958 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:48:53,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:48:53,959 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:48:53,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:48:53,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:48:53,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:48:53,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:48:53,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:48:53,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:48:53,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:48:53,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:48:53,961 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:48:53,961 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:53,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:48:53,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:48:53,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:48:53,963 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 [2022-11-03 02:48:54,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:48:54,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:48:54,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:48:54,474 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:48:54,475 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:48:54,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2022-11-03 02:48:54,568 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/data/a55bb1447/571e1a7911ae446cb91f4eda729a832f/FLAGba2eb5172 [2022-11-03 02:48:55,411 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:48:55,412 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2022-11-03 02:48:55,460 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/data/a55bb1447/571e1a7911ae446cb91f4eda729a832f/FLAGba2eb5172 [2022-11-03 02:48:55,961 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/data/a55bb1447/571e1a7911ae446cb91f4eda729a832f [2022-11-03 02:48:55,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:48:55,965 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:48:55,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:48:55,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:48:55,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:48:55,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:48:55" (1/1) ... [2022-11-03 02:48:55,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f3ec6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:55, skipping insertion in model container [2022-11-03 02:48:55,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:48:55" (1/1) ... [2022-11-03 02:48:55,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:48:56,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:48:56,381 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2022-11-03 02:48:56,387 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2022-11-03 02:48:57,428 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,434 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,435 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,437 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,440 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,458 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,459 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,461 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,462 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,464 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,465 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,466 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,467 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:57,854 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:48:57,856 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:48:57,857 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:48:57,859 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:48:57,860 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:48:57,861 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:48:57,862 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:48:57,863 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:48:57,864 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:48:57,865 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:48:58,040 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:48:58,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:48:58,096 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:48:58,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:48:58,137 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2022-11-03 02:48:58,138 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2022-11-03 02:48:58,181 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,181 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,182 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,182 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,183 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,192 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,193 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,194 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,194 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,196 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,196 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,197 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,197 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,259 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:48:58,275 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:48:58,276 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:48:58,277 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:48:58,280 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:48:58,288 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:48:58,289 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:48:58,290 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:48:58,290 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:48:58,291 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:48:58,314 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:48:58,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:48:58,340 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:48:58,356 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2022-11-03 02:48:58,356 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2022-11-03 02:48:58,395 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,396 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,396 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,397 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,397 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,404 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,405 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,406 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,406 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,408 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,408 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,409 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,409 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:48:58,463 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:48:58,464 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:48:58,466 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:48:58,467 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:48:58,468 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:48:58,469 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:48:58,469 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:48:58,470 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:48:58,470 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:48:58,471 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:48:58,547 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:48:58,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:48:58,894 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:48:58,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58 WrapperNode [2022-11-03 02:48:58,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:48:58,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:48:58,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:48:58,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:48:58,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58" (1/1) ... [2022-11-03 02:48:59,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58" (1/1) ... [2022-11-03 02:48:59,138 INFO L138 Inliner]: procedures = 698, calls = 1048, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 151 [2022-11-03 02:48:59,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:48:59,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:48:59,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:48:59,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:48:59,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58" (1/1) ... [2022-11-03 02:48:59,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58" (1/1) ... [2022-11-03 02:48:59,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58" (1/1) ... [2022-11-03 02:48:59,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58" (1/1) ... [2022-11-03 02:48:59,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58" (1/1) ... [2022-11-03 02:48:59,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58" (1/1) ... [2022-11-03 02:48:59,215 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58" (1/1) ... [2022-11-03 02:48:59,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58" (1/1) ... [2022-11-03 02:48:59,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:48:59,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:48:59,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:48:59,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:48:59,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58" (1/1) ... [2022-11-03 02:48:59,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:48:59,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:59,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:48:59,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:48:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:48:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:48:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:48:59,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:48:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:48:59,343 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:48:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:48:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-03 02:48:59,344 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-03 02:48:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:48:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:48:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_insert_before [2022-11-03 02:48:59,345 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_insert_before [2022-11-03 02:48:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:48:59,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:48:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:48:59,347 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:48:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:48:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:48:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:48:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-03 02:48:59,349 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-03 02:48:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-03 02:48:59,349 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-03 02:48:59,728 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:48:59,730 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:49:00,364 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:49:00,373 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:49:00,373 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:49:00,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:00 BoogieIcfgContainer [2022-11-03 02:49:00,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:49:00,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:49:00,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:49:00,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:49:00,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:48:55" (1/3) ... [2022-11-03 02:49:00,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2580c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:49:00, skipping insertion in model container [2022-11-03 02:49:00,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:58" (2/3) ... [2022-11-03 02:49:00,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2580c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:49:00, skipping insertion in model container [2022-11-03 02:49:00,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:00" (3/3) ... [2022-11-03 02:49:00,386 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_push_back_harness.i [2022-11-03 02:49:00,426 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:49:00,438 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:49:00,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:49:00,510 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;@669122db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:49:00,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:49:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 66 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-03 02:49:00,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:49:00,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:00,531 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:00,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:00,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:00,538 INFO L85 PathProgramCache]: Analyzing trace with hash 524704703, now seen corresponding path program 1 times [2022-11-03 02:49:00,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:00,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346204110] [2022-11-03 02:49:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:00,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:00,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:00,562 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:00,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:49:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:49:01,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:49:01,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:01,399 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:01,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346204110] [2022-11-03 02:49:01,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346204110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:01,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:01,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:49:01,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790020295] [2022-11-03 02:49:01,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:01,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:49:01,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:01,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:49:01,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:49:01,461 INFO L87 Difference]: Start difference. First operand has 102 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 66 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 02:49:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:01,538 INFO L93 Difference]: Finished difference Result 196 states and 291 transitions. [2022-11-03 02:49:01,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:49:01,542 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2022-11-03 02:49:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:01,559 INFO L225 Difference]: With dead ends: 196 [2022-11-03 02:49:01,560 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 02:49:01,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:49:01,580 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:01,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:49:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 02:49:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-03 02:49:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 62 states have internal predecessors, (76), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-03 02:49:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2022-11-03 02:49:01,662 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 73 [2022-11-03 02:49:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:01,663 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2022-11-03 02:49:01,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 02:49:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2022-11-03 02:49:01,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:49:01,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:01,670 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:01,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:01,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:01,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:01,899 INFO L85 PathProgramCache]: Analyzing trace with hash -569763587, now seen corresponding path program 1 times [2022-11-03 02:49:01,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:01,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650035128] [2022-11-03 02:49:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:01,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:01,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:01,907 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:01,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:49:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:02,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:49:02,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:49:02,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:02,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:02,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650035128] [2022-11-03 02:49:02,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650035128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:02,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:02,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:49:02,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588274802] [2022-11-03 02:49:02,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:02,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:49:02,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:02,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:49:02,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:02,672 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:49:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:02,884 INFO L93 Difference]: Finished difference Result 196 states and 272 transitions. [2022-11-03 02:49:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:49:02,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-11-03 02:49:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:02,887 INFO L225 Difference]: With dead ends: 196 [2022-11-03 02:49:02,887 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 02:49:02,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:02,890 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 42 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:02,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 569 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 02:49:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-03 02:49:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 62 states have internal predecessors, (75), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-03 02:49:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2022-11-03 02:49:02,908 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 73 [2022-11-03 02:49:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:02,910 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2022-11-03 02:49:02,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:49:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2022-11-03 02:49:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:49:02,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:02,913 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:02,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:03,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:03,135 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:03,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1956548997, now seen corresponding path program 1 times [2022-11-03 02:49:03,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:03,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275749094] [2022-11-03 02:49:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:03,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:03,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:03,139 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:03,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:49:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:03,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:49:03,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:49:03,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:03,661 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:03,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275749094] [2022-11-03 02:49:03,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275749094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:03,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:03,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:49:03,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714011651] [2022-11-03 02:49:03,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:03,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:49:03,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:03,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:49:03,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:03,664 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:49:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:03,836 INFO L93 Difference]: Finished difference Result 182 states and 247 transitions. [2022-11-03 02:49:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:49:03,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-11-03 02:49:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:03,845 INFO L225 Difference]: With dead ends: 182 [2022-11-03 02:49:03,846 INFO L226 Difference]: Without dead ends: 99 [2022-11-03 02:49:03,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:03,850 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 2 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:03,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 597 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-03 02:49:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-03 02:49:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 64 states have internal predecessors, (76), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:49:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2022-11-03 02:49:03,888 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 73 [2022-11-03 02:49:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:03,890 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2022-11-03 02:49:03,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:49:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2022-11-03 02:49:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 02:49:03,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:03,895 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:03,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:04,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:04,110 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:04,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:04,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1237560575, now seen corresponding path program 1 times [2022-11-03 02:49:04,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:04,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751941418] [2022-11-03 02:49:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:04,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:04,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:04,120 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:04,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:49:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:04,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:49:04,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:49:04,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:04,785 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:04,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751941418] [2022-11-03 02:49:04,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751941418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:04,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:04,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:49:04,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575667139] [2022-11-03 02:49:04,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:04,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:49:04,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:04,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:49:04,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:04,790 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:49:05,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:05,140 INFO L93 Difference]: Finished difference Result 187 states and 254 transitions. [2022-11-03 02:49:05,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:49:05,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 75 [2022-11-03 02:49:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:05,143 INFO L225 Difference]: With dead ends: 187 [2022-11-03 02:49:05,143 INFO L226 Difference]: Without dead ends: 99 [2022-11-03 02:49:05,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:49:05,145 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 49 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:05,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 605 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:49:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-03 02:49:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-03 02:49:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:49:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2022-11-03 02:49:05,177 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 75 [2022-11-03 02:49:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:05,179 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2022-11-03 02:49:05,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:49:05,180 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2022-11-03 02:49:05,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 02:49:05,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:05,184 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:05,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:05,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:05,399 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:05,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1187141198, now seen corresponding path program 1 times [2022-11-03 02:49:05,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:05,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534583254] [2022-11-03 02:49:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:05,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:05,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:05,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:05,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:49:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:05,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:49:05,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:49:06,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:06,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:06,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534583254] [2022-11-03 02:49:06,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534583254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:06,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:06,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:49:06,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558907482] [2022-11-03 02:49:06,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:06,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:49:06,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:06,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:49:06,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:49:06,087 INFO L87 Difference]: Start difference. First operand 99 states and 132 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:49:06,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:06,561 INFO L93 Difference]: Finished difference Result 196 states and 267 transitions. [2022-11-03 02:49:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:49:06,562 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2022-11-03 02:49:06,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:06,564 INFO L225 Difference]: With dead ends: 196 [2022-11-03 02:49:06,564 INFO L226 Difference]: Without dead ends: 107 [2022-11-03 02:49:06,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:49:06,565 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 75 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:06,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 698 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:49:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-03 02:49:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2022-11-03 02:49:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 65 states have internal predecessors, (76), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:49:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 133 transitions. [2022-11-03 02:49:06,588 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 133 transitions. Word has length 77 [2022-11-03 02:49:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:06,591 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 133 transitions. [2022-11-03 02:49:06,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:49:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 133 transitions. [2022-11-03 02:49:06,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 02:49:06,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:06,605 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:06,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:06,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:06,819 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:06,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1548809988, now seen corresponding path program 1 times [2022-11-03 02:49:06,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:06,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086813897] [2022-11-03 02:49:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:06,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:06,822 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:06,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:49:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:07,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:49:07,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:49:07,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:07,468 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:07,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086813897] [2022-11-03 02:49:07,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086813897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:07,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:07,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:49:07,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741027567] [2022-11-03 02:49:07,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:07,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:49:07,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:49:07,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:07,470 INFO L87 Difference]: Start difference. First operand 100 states and 133 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:49:07,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:07,754 INFO L93 Difference]: Finished difference Result 192 states and 263 transitions. [2022-11-03 02:49:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:49:07,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2022-11-03 02:49:07,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:07,756 INFO L225 Difference]: With dead ends: 192 [2022-11-03 02:49:07,756 INFO L226 Difference]: Without dead ends: 106 [2022-11-03 02:49:07,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:49:07,757 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 57 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:07,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 492 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:49:07,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-03 02:49:07,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-11-03 02:49:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 64 states have (on average 1.203125) internal successors, (77), 66 states have internal predecessors, (77), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:49:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-11-03 02:49:07,797 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 78 [2022-11-03 02:49:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:07,800 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-11-03 02:49:07,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:49:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-11-03 02:49:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:49:07,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:07,808 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:07,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:08,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:08,023 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:08,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1185344546, now seen corresponding path program 1 times [2022-11-03 02:49:08,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:08,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041999513] [2022-11-03 02:49:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:08,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:08,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:08,026 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:08,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:49:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:08,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:49:08,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:49:08,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:08,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:08,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041999513] [2022-11-03 02:49:08,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041999513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:08,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:08,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:49:08,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434133173] [2022-11-03 02:49:08,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:08,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:49:08,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:08,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:49:08,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:08,611 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:49:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:08,762 INFO L93 Difference]: Finished difference Result 191 states and 256 transitions. [2022-11-03 02:49:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:49:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 86 [2022-11-03 02:49:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:08,766 INFO L225 Difference]: With dead ends: 191 [2022-11-03 02:49:08,766 INFO L226 Difference]: Without dead ends: 104 [2022-11-03 02:49:08,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:49:08,768 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 4 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:08,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 720 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-03 02:49:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2022-11-03 02:49:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 65 states have (on average 1.2) internal successors, (78), 67 states have internal predecessors, (78), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:49:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2022-11-03 02:49:08,793 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 86 [2022-11-03 02:49:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:08,794 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2022-11-03 02:49:08,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:49:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2022-11-03 02:49:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:49:08,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:08,795 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:08,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:09,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:09,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:09,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:09,020 INFO L85 PathProgramCache]: Analyzing trace with hash 172862485, now seen corresponding path program 1 times [2022-11-03 02:49:09,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:09,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340563580] [2022-11-03 02:49:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:09,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:09,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:09,023 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:09,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:49:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:09,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:49:09,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:49:10,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 02:49:11,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:11,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340563580] [2022-11-03 02:49:11,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340563580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:11,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [491878170] [2022-11-03 02:49:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:11,178 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:11,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:11,186 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:11,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 02:49:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:11,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:49:11,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:49:12,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:12,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [491878170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:12,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:49:12,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8] total 22 [2022-11-03 02:49:12,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284480280] [2022-11-03 02:49:12,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:12,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:49:12,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:12,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:49:12,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:49:12,075 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 02:49:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:12,307 INFO L93 Difference]: Finished difference Result 196 states and 262 transitions. [2022-11-03 02:49:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:49:12,308 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 88 [2022-11-03 02:49:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:12,309 INFO L225 Difference]: With dead ends: 196 [2022-11-03 02:49:12,309 INFO L226 Difference]: Without dead ends: 108 [2022-11-03 02:49:12,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:49:12,311 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 8 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:12,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 829 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-03 02:49:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2022-11-03 02:49:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:49:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2022-11-03 02:49:12,323 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 88 [2022-11-03 02:49:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:12,323 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2022-11-03 02:49:12,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 02:49:12,324 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2022-11-03 02:49:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 02:49:12,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:12,325 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:12,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2022-11-03 02:49:12,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:12,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:12,729 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:12,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:12,729 INFO L85 PathProgramCache]: Analyzing trace with hash 759251201, now seen corresponding path program 1 times [2022-11-03 02:49:12,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:12,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775769497] [2022-11-03 02:49:12,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:12,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:12,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:12,731 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:12,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:49:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:13,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 144 conjunts are in the unsatisfiable core [2022-11-03 02:49:13,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:13,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-11-03 02:49:13,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 11 treesize of output 14 [2022-11-03 02:49:13,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:49:17,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:17,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:17,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 412 treesize of output 390 [2022-11-03 02:49:17,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:17,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:17,983 INFO L356 Elim1Store]: treesize reduction 124, result has 19.5 percent of original size [2022-11-03 02:49:17,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 64 [2022-11-03 02:49:17,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:18,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 84 [2022-11-03 02:49:18,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:18,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-03 02:49:18,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 02:49:20,982 INFO L356 Elim1Store]: treesize reduction 287, result has 35.5 percent of original size [2022-11-03 02:49:20,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 36 case distinctions, treesize of input 255 treesize of output 282 [2022-11-03 02:49:21,594 INFO L356 Elim1Store]: treesize reduction 52, result has 57.0 percent of original size [2022-11-03 02:49:21,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 285 treesize of output 241 [2022-11-03 02:49:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:49:21,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:25,888 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse8 (select |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base)) (.cse1 (bvadd (_ bv8 64) c_aws_linked_list_insert_before_~before.offset)) (.cse6 (select |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base))) (and (forall ((aws_linked_list_insert_before_~to_add.offset (_ BitVec 64))) (= c_aws_linked_list_insert_before_~before.base (select (select (let ((.cse0 (let ((.cse5 (bvadd (_ bv8 64) aws_linked_list_insert_before_~to_add.offset))) (let ((.cse2 (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base (let ((.cse7 (store .cse8 aws_linked_list_insert_before_~to_add.offset c_aws_linked_list_insert_before_~before.base))) (store .cse7 .cse5 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base .cse7) c_aws_linked_list_insert_before_~before.base) .cse1)))))) (let ((.cse3 (select (select .cse2 c_aws_linked_list_insert_before_~before.base) .cse1))) (store .cse2 .cse3 (store (select .cse2 .cse3) (select (select (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base (let ((.cse4 (store .cse6 aws_linked_list_insert_before_~to_add.offset c_aws_linked_list_insert_before_~before.offset))) (store .cse4 .cse5 (select (select (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base .cse4) c_aws_linked_list_insert_before_~before.base) .cse1)))) c_aws_linked_list_insert_before_~before.base) .cse1) c_aws_linked_list_insert_before_~to_add.base))))))) (store .cse0 c_aws_linked_list_insert_before_~before.base (store (select .cse0 c_aws_linked_list_insert_before_~before.base) .cse1 c_aws_linked_list_insert_before_~to_add.base))) c_aws_linked_list_insert_before_~to_add.base) aws_linked_list_insert_before_~to_add.offset))) (forall ((v_ArrVal_1669 (Array (_ BitVec 64) (_ BitVec 64))) (aws_linked_list_insert_before_~to_add.offset (_ BitVec 64)) (v_ArrVal_1721 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select (select (let ((.cse12 (bvadd (_ bv8 64) aws_linked_list_insert_before_~to_add.offset))) (let ((.cse9 (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base (let ((.cse13 (store .cse6 aws_linked_list_insert_before_~to_add.offset c_aws_linked_list_insert_before_~before.offset))) (store .cse13 .cse12 (select (select (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base .cse13) c_aws_linked_list_insert_before_~before.base) .cse1))))) (.cse10 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base (let ((.cse11 (store .cse8 aws_linked_list_insert_before_~to_add.offset c_aws_linked_list_insert_before_~before.base))) (store .cse11 .cse12 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base .cse11) c_aws_linked_list_insert_before_~before.base) .cse1)))) c_aws_linked_list_insert_before_~before.base) .cse1))) (store (store .cse9 .cse10 v_ArrVal_1721) c_aws_linked_list_insert_before_~before.base (store (select (store .cse9 .cse10 v_ArrVal_1669) c_aws_linked_list_insert_before_~before.base) .cse1 aws_linked_list_insert_before_~to_add.offset)))) c_aws_linked_list_insert_before_~to_add.base) aws_linked_list_insert_before_~to_add.offset) c_aws_linked_list_insert_before_~before.offset)))) is different from false [2022-11-03 02:49:27,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:27,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775769497] [2022-11-03 02:49:27,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775769497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:27,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1169702508] [2022-11-03 02:49:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:27,373 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:27,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:27,375 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:27,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 02:49:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:29,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 02:49:29,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:29,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-11-03 02:49:30,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 11 treesize of output 14 [2022-11-03 02:49:30,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:49:33,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:33,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-11-03 02:49:33,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:33,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:34,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 35 [2022-11-03 02:49:34,201 INFO L356 Elim1Store]: treesize reduction 76, result has 12.6 percent of original size [2022-11-03 02:49:34,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: v_arrayElimArr_4 input size 58 context size 58 output size 58 [2022-11-03 02:49:34,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385352147] [2022-11-03 02:49:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:34,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:34,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:34,208 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:34,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:49:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:34,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 135 conjunts are in the unsatisfiable core [2022-11-03 02:49:34,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:34,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2022-11-03 02:49:35,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 11 treesize of output 14 [2022-11-03 02:49:35,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:49:41,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:41,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 321 treesize of output 287 [2022-11-03 02:49:42,115 INFO L356 Elim1Store]: treesize reduction 76, result has 12.6 percent of original size [2022-11-03 02:49:42,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: v_arrayElimArr_9 input size 67 context size 67 output size 67 [2022-11-03 02:49:42,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:42,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-11-03 02:49:42,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377264134] [2022-11-03 02:49:42,116 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:49:42,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:49:42,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:42,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:49:42,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2290, Unknown=1, NotChecked=96, Total=2550 [2022-11-03 02:49:42,118 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 25 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 7 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-03 02:49:44,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:44,598 INFO L93 Difference]: Finished difference Result 204 states and 269 transitions. [2022-11-03 02:49:44,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:49:44,599 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 7 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 89 [2022-11-03 02:49:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:44,602 INFO L225 Difference]: With dead ends: 204 [2022-11-03 02:49:44,602 INFO L226 Difference]: Without dead ends: 197 [2022-11-03 02:49:44,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 173 SyntacticMatches, 32 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=187, Invalid=2678, Unknown=1, NotChecked=104, Total=2970 [2022-11-03 02:49:44,604 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 66 mSDsluCounter, 2374 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:44,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 2523 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 218 Invalid, 0 Unknown, 441 Unchecked, 1.7s Time] [2022-11-03 02:49:44,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-03 02:49:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 171. [2022-11-03 02:49:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 117 states have (on average 1.2136752136752136) internal successors, (142), 121 states have internal predecessors, (142), 38 states have call successors, (38), 14 states have call predecessors, (38), 15 states have return successors, (41), 35 states have call predecessors, (41), 37 states have call successors, (41) [2022-11-03 02:49:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 221 transitions. [2022-11-03 02:49:44,628 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 221 transitions. Word has length 89 [2022-11-03 02:49:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:44,629 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 221 transitions. [2022-11-03 02:49:44,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 7 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-03 02:49:44,629 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 221 transitions. [2022-11-03 02:49:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 02:49:44,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:44,631 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:44,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:44,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:45,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:45,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:45,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash -50095425, now seen corresponding path program 1 times [2022-11-03 02:49:45,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:45,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016434161] [2022-11-03 02:49:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:45,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:45,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:45,254 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:45,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:49:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:45,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 02:49:45,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:46,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-03 02:49:51,744 WARN L234 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 105 DAG size of output: 58 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:49:51,744 INFO L356 Elim1Store]: treesize reduction 294, result has 35.7 percent of original size [2022-11-03 02:49:51,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:51,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016434161] [2022-11-03 02:49:51,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_43| input size 229 context size 229 output size 229 [2022-11-03 02:49:51,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1580978154] [2022-11-03 02:49:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:51,746 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:51,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:51,747 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:51,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:49:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:52,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:49:52,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:58,109 WARN L234 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 105 DAG size of output: 58 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:49:58,110 INFO L356 Elim1Store]: treesize reduction 294, result has 35.7 percent of original size [2022-11-03 02:49:58,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_44| input size 238 context size 238 output size 238 [2022-11-03 02:49:58,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653355739] [2022-11-03 02:49:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:58,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:58,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:58,113 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:58,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:49:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:58,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:49:58,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:04,448 WARN L234 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 105 DAG size of output: 58 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:50:04,449 INFO L356 Elim1Store]: treesize reduction 294, result has 35.7 percent of original size [2022-11-03 02:50:04,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_45| input size 238 context size 238 output size 238 [2022-11-03 02:50:04,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:04,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-11-03 02:50:04,450 ERROR L170 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2022-11-03 02:50:04,450 INFO L359 BasicCegarLoop]: Counterexample might be feasible [2022-11-03 02:50:04,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:50:04,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:04,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:04,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:05,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:50:05,082 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:05,084 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:50:05,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:50:05 BoogieIcfgContainer [2022-11-03 02:50:05,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:50:05,109 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:50:05,109 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:50:05,110 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:50:05,110 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:00" (3/4) ... [2022-11-03 02:50:05,114 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:50:05,114 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:50:05,115 INFO L158 Benchmark]: Toolchain (without parser) took 69149.69ms. Allocated memory was 73.4MB in the beginning and 222.3MB in the end (delta: 148.9MB). Free memory was 49.3MB in the beginning and 52.2MB in the end (delta: -2.9MB). Peak memory consumption was 146.1MB. Max. memory is 16.1GB. [2022-11-03 02:50:05,115 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 73.4MB. Free memory is still 54.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:50:05,116 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2929.58ms. Allocated memory was 73.4MB in the beginning and 123.7MB in the end (delta: 50.3MB). Free memory was 49.2MB in the beginning and 55.6MB in the end (delta: -6.5MB). Peak memory consumption was 55.7MB. Max. memory is 16.1GB. [2022-11-03 02:50:05,118 INFO L158 Benchmark]: Boogie Procedure Inliner took 243.80ms. Allocated memory is still 123.7MB. Free memory was 55.6MB in the beginning and 50.1MB in the end (delta: 5.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:50:05,122 INFO L158 Benchmark]: Boogie Preprocessor took 82.94ms. Allocated memory is still 123.7MB. Free memory was 50.1MB in the beginning and 78.9MB in the end (delta: -28.8MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2022-11-03 02:50:05,122 INFO L158 Benchmark]: RCFGBuilder took 1152.04ms. Allocated memory is still 123.7MB. Free memory was 78.8MB in the beginning and 51.7MB in the end (delta: 27.2MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2022-11-03 02:50:05,128 INFO L158 Benchmark]: TraceAbstraction took 64729.77ms. Allocated memory was 123.7MB in the beginning and 222.3MB in the end (delta: 98.6MB). Free memory was 50.5MB in the beginning and 52.2MB in the end (delta: -1.7MB). Peak memory consumption was 95.8MB. Max. memory is 16.1GB. [2022-11-03 02:50:05,128 INFO L158 Benchmark]: Witness Printer took 5.10ms. Allocated memory is still 222.3MB. Free memory is still 52.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:50:05,130 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 73.4MB. Free memory is still 54.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2929.58ms. Allocated memory was 73.4MB in the beginning and 123.7MB in the end (delta: 50.3MB). Free memory was 49.2MB in the beginning and 55.6MB in the end (delta: -6.5MB). Peak memory consumption was 55.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 243.80ms. Allocated memory is still 123.7MB. Free memory was 55.6MB in the beginning and 50.1MB in the end (delta: 5.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 82.94ms. Allocated memory is still 123.7MB. Free memory was 50.1MB in the beginning and 78.9MB in the end (delta: -28.8MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1152.04ms. Allocated memory is still 123.7MB. Free memory was 78.8MB in the beginning and 51.7MB in the end (delta: 27.2MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * TraceAbstraction took 64729.77ms. Allocated memory was 123.7MB in the beginning and 222.3MB in the end (delta: 98.6MB). Free memory was 50.5MB in the beginning and 52.2MB in the end (delta: -1.7MB). Peak memory consumption was 95.8MB. Max. memory is 16.1GB. * Witness Printer took 5.10ms. Allocated memory is still 222.3MB. Free memory is still 52.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 223]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L6913-L6918] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L7358] static __thread int tl_last_error = 0; [L7394] CALL aws_linked_list_push_back_harness() [L7376] struct aws_linked_list list; [L7377] struct aws_linked_list_node to_add; [L7379] CALL ensure_linked_list_is_allocated(&list, 20) [L6755] CALL, EXPR nondet_uint64_t() [L266] return __VERIFIER_nondet_ulong(); [L6755] RET, EXPR nondet_uint64_t() [L6755] size_t length = nondet_uint64_t(); [L6756] CALL assume_abort_if_not(length <= max_length) [L211] COND FALSE !(!cond) [L6756] RET assume_abort_if_not(length <= max_length) [L6758-L6759] list->head.prev = ((void *)0) [L6761-L6762] list->tail.next = ((void *)0) [L6765] struct aws_linked_list_node *curr = &list->head; [L6767] size_t i = 0; [L6767] COND FALSE !(i < length) [L6776] curr->next = &list->tail [L6777] list->tail.prev = curr [L7379] RET ensure_linked_list_is_allocated(&list, 20) [L7382] EXPR list.tail.prev [L7382] struct aws_linked_list_node *old_last = list.tail.prev; [L7385] CALL aws_linked_list_push_back(&list, &to_add) [L4947] CALL, EXPR aws_linked_list_is_valid(list) [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; [L4750] COND TRUE \read(*temp) [L4751] COND FALSE !(temp == &list->tail) [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 [L4764] return head_reaches_tail; [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L4947] RET, EXPR aws_linked_list_is_valid(list) [L4947] CALL assume_abort_if_not((aws_linked_list_is_valid(list))) [L211] COND FALSE !(!cond) [L4947] RET assume_abort_if_not((aws_linked_list_is_valid(list))) [L4948-L4950] CALL assume_abort_if_not((node != ((void *)0) )) [L211] COND FALSE !(!cond) [L4948-L4950] RET assume_abort_if_not((node != ((void *)0) )) [L4951] CALL aws_linked_list_insert_before(&list->tail, node) [L4912] CALL, EXPR aws_linked_list_node_prev_is_valid(before) [L4729] EXPR node && node->prev [L4729] EXPR node->prev [L4729] EXPR node && node->prev [L4729] EXPR node && node->prev && node->prev->next == node [L4729] EXPR node->prev [L4729] EXPR node->prev->next [L4729] EXPR node && node->prev && node->prev->next == node [L4729] return node && node->prev && node->prev->next == node; [L4912] RET, EXPR aws_linked_list_node_prev_is_valid(before) [L4912] CALL assume_abort_if_not((aws_linked_list_node_prev_is_valid(before))) [L211] COND FALSE !(!cond) [L4912] RET assume_abort_if_not((aws_linked_list_node_prev_is_valid(before))) [L4913-L4915] CALL assume_abort_if_not((to_add != ((void *)0) )) [L211] COND FALSE !(!cond) [L4913-L4915] RET assume_abort_if_not((to_add != ((void *)0) )) [L4916] to_add->next = before [L4917] EXPR before->prev [L4917] to_add->prev = before->prev [L4918] EXPR before->prev [L4918] before->prev->next = to_add [L4919] before->prev = to_add [L4920] CALL, EXPR aws_linked_list_node_prev_is_valid(before) [L4729] EXPR node && node->prev [L4729] EXPR node->prev [L4729] EXPR node && node->prev [L4729] EXPR node && node->prev && node->prev->next == node [L4729] return node && node->prev && node->prev->next == node; [L4920] RET, EXPR aws_linked_list_node_prev_is_valid(before) [L4920] CALL __VERIFIER_assert((aws_linked_list_node_prev_is_valid(before))) [L223] COND TRUE !cond [L223] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 102 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 64.6s, OverallIterations: 10, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 319 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 303 mSDsluCounter, 7169 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 441 IncrementalHoareTripleChecker+Unchecked, 6037 mSDsCounter, 143 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 755 IncrementalHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 143 mSolverCounterUnsat, 1132 mSDtfsCounter, 755 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1064 GetRequests, 912 SyntacticMatches, 33 SemanticMatches, 119 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 20.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=9, InterpolantAutomatonStates: 79, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 9 MinimizatonAttempts, 45 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 22.8s InterpolantComputationTime, 889 NumberOfCodeBlocks, 889 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 877 ConstructedInterpolants, 66 QuantifiedInterpolants, 3888 SizeOfPredicates, 79 NumberOfNonLiveVariables, 4363 ConjunctsInSsa, 256 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 511/522 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:50:05,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c45c43-0963-4694-a65b-b4006e6dba26/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN