./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 811b19098d8792ad6e5000a82cea527dd92a4bca0da5ce1bf33c0114316cf54d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:34:02,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:34:02,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:34:02,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:34:02,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:34:02,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:34:02,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:34:02,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:34:02,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:34:02,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:34:02,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:34:02,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:34:02,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:34:02,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:34:02,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:34:02,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:34:02,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:34:02,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:34:02,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:34:02,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:34:02,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:34:02,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:34:02,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:34:02,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:34:02,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:34:02,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:34:02,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:34:02,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:34:02,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:34:02,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:34:02,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:34:02,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:34:02,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:34:02,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:34:02,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:34:02,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:34:02,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:34:02,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:34:02,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:34:02,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:34:02,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:34:02,715 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 14:34:02,737 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:34:02,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:34:02,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:34:02,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:34:02,738 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:34:02,739 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:34:02,739 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:34:02,739 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:34:02,739 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:34:02,739 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:34:02,740 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:34:02,740 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:34:02,740 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:34:02,740 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:34:02,740 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:34:02,741 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:34:02,741 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:34:02,741 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:34:02,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:34:02,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:34:02,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:34:02,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:34:02,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:34:02,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:34:02,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:34:02,743 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:34:02,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:34:02,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:34:02,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:34:02,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:34:02,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:34:02,744 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:34:02,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:34:02,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:34:02,745 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:34:02,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:34:02,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:34:02,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:34:02,745 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_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 811b19098d8792ad6e5000a82cea527dd92a4bca0da5ce1bf33c0114316cf54d [2022-12-14 14:34:02,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:34:02,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:34:02,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:34:02,962 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:34:02,962 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:34:02,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i [2022-12-14 14:34:05,518 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:34:05,831 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:34:05,832 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i [2022-12-14 14:34:05,848 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/data/b5ae99e22/127cd201785e496587de2d3c4d01c062/FLAG514c0a1b4 [2022-12-14 14:34:05,859 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/data/b5ae99e22/127cd201785e496587de2d3c4d01c062 [2022-12-14 14:34:05,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:34:05,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:34:05,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:34:05,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:34:05,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:34:05,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:34:05" (1/1) ... [2022-12-14 14:34:05,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2235242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:05, skipping insertion in model container [2022-12-14 14:34:05,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:34:05" (1/1) ... [2022-12-14 14:34:05,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:34:05,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:34:06,149 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i[4502,4515] [2022-12-14 14:34:06,156 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i[4562,4575] [2022-12-14 14:34:06,788 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,788 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,789 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,790 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,791 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,805 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,805 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,807 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,808 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,810 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,811 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,812 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,812 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:06,866 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:34:06,866 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:34:06,867 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:34:06,871 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 14:34:06,873 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 14:34:06,874 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 14:34:07,064 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 14:34:07,065 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 14:34:07,066 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 14:34:07,067 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 14:34:07,068 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 14:34:07,069 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 14:34:07,070 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 14:34:07,070 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 14:34:07,071 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 14:34:07,072 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 14:34:07,072 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 14:34:07,184 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 14:34:07,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:34:07,222 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:34:07,235 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i[4502,4515] [2022-12-14 14:34:07,236 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i[4562,4575] [2022-12-14 14:34:07,275 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,275 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,276 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,276 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,277 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,284 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,285 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,286 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,287 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,288 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,288 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,289 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,289 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:34:07,297 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:34:07,297 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:34:07,298 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:34:07,301 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 14:34:07,303 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 14:34:07,303 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 14:34:07,327 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 14:34:07,328 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 14:34:07,329 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 14:34:07,330 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 14:34:07,331 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 14:34:07,332 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 14:34:07,333 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 14:34:07,333 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 14:34:07,334 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 14:34:07,334 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 14:34:07,334 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 14:34:07,356 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 14:34:07,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:34:07,583 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:34:07,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07 WrapperNode [2022-12-14 14:34:07,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:34:07,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:34:07,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:34:07,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:34:07,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07" (1/1) ... [2022-12-14 14:34:07,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07" (1/1) ... [2022-12-14 14:34:07,646 INFO L138 Inliner]: procedures = 679, calls = 1047, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 77 [2022-12-14 14:34:07,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:34:07,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:34:07,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:34:07,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:34:07,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07" (1/1) ... [2022-12-14 14:34:07,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07" (1/1) ... [2022-12-14 14:34:07,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07" (1/1) ... [2022-12-14 14:34:07,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07" (1/1) ... [2022-12-14 14:34:07,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07" (1/1) ... [2022-12-14 14:34:07,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07" (1/1) ... [2022-12-14 14:34:07,667 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07" (1/1) ... [2022-12-14 14:34:07,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07" (1/1) ... [2022-12-14 14:34:07,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:34:07,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:34:07,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:34:07,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:34:07,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07" (1/1) ... [2022-12-14 14:34:07,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:34:07,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:07,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:34:07,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:34:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 14:34:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 14:34:07,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 14:34:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 14:34:07,739 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 14:34:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:34:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 14:34:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:34:07,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:34:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 14:34:07,740 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 14:34:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 14:34:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 14:34:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 14:34:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-12-14 14:34:07,740 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-12-14 14:34:07,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:34:07,908 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:34:07,909 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:34:08,101 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:34:08,175 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:34:08,176 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 14:34:08,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:34:08 BoogieIcfgContainer [2022-12-14 14:34:08,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:34:08,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:34:08,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:34:08,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:34:08,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:34:05" (1/3) ... [2022-12-14 14:34:08,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753d6ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:34:08, skipping insertion in model container [2022-12-14 14:34:08,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:07" (2/3) ... [2022-12-14 14:34:08,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753d6ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:34:08, skipping insertion in model container [2022-12-14 14:34:08,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:34:08" (3/3) ... [2022-12-14 14:34:08,184 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_insert_after_harness.i [2022-12-14 14:34:08,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:34:08,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:34:08,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:34:08,255 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;@1d543280, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:34:08,255 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:34:08,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 14:34:08,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 14:34:08,265 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:08,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:08,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:08,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:08,271 INFO L85 PathProgramCache]: Analyzing trace with hash -144968383, now seen corresponding path program 1 times [2022-12-14 14:34:08,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:08,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512067814] [2022-12-14 14:34:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:08,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 14:34:11,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:11,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512067814] [2022-12-14 14:34:11,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512067814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:11,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:34:11,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 14:34:11,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191173311] [2022-12-14 14:34:11,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:11,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:34:11,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:11,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:34:11,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:34:11,766 INFO L87 Difference]: Start difference. First operand has 46 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 8 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 14:34:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:12,115 INFO L93 Difference]: Finished difference Result 86 states and 124 transitions. [2022-12-14 14:34:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:34:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2022-12-14 14:34:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:12,123 INFO L225 Difference]: With dead ends: 86 [2022-12-14 14:34:12,123 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 14:34:12,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:34:12,128 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:12,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 170 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:34:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 14:34:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-12-14 14:34:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 14:34:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2022-12-14 14:34:12,161 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 19 [2022-12-14 14:34:12,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:12,161 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2022-12-14 14:34:12,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 14:34:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2022-12-14 14:34:12,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 14:34:12,163 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:12,163 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:12,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:34:12,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash 728698747, now seen corresponding path program 1 times [2022-12-14 14:34:12,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:12,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782635607] [2022-12-14 14:34:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:12,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 14:34:14,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:14,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782635607] [2022-12-14 14:34:14,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782635607] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:34:14,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828121050] [2022-12-14 14:34:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:14,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:14,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:14,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:34:14,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:34:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:14,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 103 conjunts are in the unsatisfiable core [2022-12-14 14:34:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:14,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 14:34:14,408 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 14:34:14,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2022-12-14 14:34:14,421 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 14:34:14,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2022-12-14 14:34:15,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:34:15,072 INFO L350 Elim1Store]: Elim1 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 157 treesize of output 129 [2022-12-14 14:34:15,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:34:15,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:34:15,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2022-12-14 14:34:15,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:34:15,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2022-12-14 14:34:15,137 INFO L321 Elim1Store]: treesize reduction 113, result has 12.4 percent of original size [2022-12-14 14:34:15,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 232 treesize of output 200 [2022-12-14 14:34:15,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2022-12-14 14:34:15,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 113 [2022-12-14 14:34:15,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2022-12-14 14:34:15,179 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 13 [2022-12-14 14:34:15,211 INFO L321 Elim1Store]: treesize reduction 53, result has 8.6 percent of original size [2022-12-14 14:34:15,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 79 [2022-12-14 14:34:15,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 14:34:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:34:15,233 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 17 [2022-12-14 14:34:16,092 INFO L321 Elim1Store]: treesize reduction 8, result has 71.4 percent of original size [2022-12-14 14:34:16,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 100 [2022-12-14 14:34:16,114 INFO L321 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2022-12-14 14:34:16,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 61 treesize of output 35 [2022-12-14 14:34:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:34:16,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:34:54,281 WARN L233 SmtUtils]: Spent 14.09s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:35:15,186 WARN L233 SmtUtils]: Spent 12.85s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:35:15,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828121050] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:35:15,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [898557530] [2022-12-14 14:35:15,207 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 14:35:15,207 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:35:15,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:35:15,216 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:35:15,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:35:15,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:15,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:15,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:15,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:15,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:15,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:15,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:35:15,514 INFO L321 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2022-12-14 14:35:15,514 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 73 treesize of output 83 [2022-12-14 14:35:15,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:15,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:15,678 INFO L217 Elim1Store]: Index analysis took 132 ms [2022-12-14 14:35:16,264 INFO L321 Elim1Store]: treesize reduction 161, result has 25.8 percent of original size [2022-12-14 14:35:16,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 78 [2022-12-14 14:35:16,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:16,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:16,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:16,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:16,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:16,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:16,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:16,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:16,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:35:16,530 INFO L321 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2022-12-14 14:35:16,530 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 73 treesize of output 83 [2022-12-14 14:35:16,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:16,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:16,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:16,714 INFO L217 Elim1Store]: Index analysis took 124 ms [2022-12-14 14:35:17,473 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-12-14 14:35:17,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 65 treesize of output 113 [2022-12-14 14:35:17,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 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 [2022-12-14 14:35:17,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:17,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:17,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 14:35:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:18,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:35:18,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:18,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:35:18,759 INFO L321 Elim1Store]: treesize reduction 276, result has 26.6 percent of original size [2022-12-14 14:35:18,759 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 1201 treesize of output 882 [2022-12-14 14:35:18,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:18,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:35:18,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:35:19,241 INFO L321 Elim1Store]: treesize reduction 85, result has 29.2 percent of original size [2022-12-14 14:35:19,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 809 treesize of output 359 [2022-12-14 14:35:19,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:19,663 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-12-14 14:35:19,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 194 treesize of output 88 [2022-12-14 14:35:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:35:20,025 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-12-14 14:35:20,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 194 treesize of output 88 [2022-12-14 14:35:20,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 14:35:20,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 14:35:20,832 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-12-14 14:35:20,856 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2022-12-14 14:35:20,879 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 20 for LOIs [2022-12-14 14:35:20,929 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 18 for LOIs [2022-12-14 14:35:20,991 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:35:35,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '429#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (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) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 14:35:35,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:35:35,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:35:35,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2022-12-14 14:35:35,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077749914] [2022-12-14 14:35:35,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:35:35,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 14:35:35,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:35:35,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 14:35:35,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1904, Unknown=14, NotChecked=0, Total=2070 [2022-12-14 14:35:35,484 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 20 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 17 states have internal predecessors, (28), 7 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 14:35:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:35:45,352 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-12-14 14:35:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 14:35:45,353 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 17 states have internal predecessors, (28), 7 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 28 [2022-12-14 14:35:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:35:45,354 INFO L225 Difference]: With dead ends: 55 [2022-12-14 14:35:45,354 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 14:35:45,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 78.9s TimeCoverageRelationStatistics Valid=227, Invalid=2727, Unknown=16, NotChecked=0, Total=2970 [2022-12-14 14:35:45,357 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:35:45,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 202 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-12-14 14:35:45,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 14:35:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-12-14 14:35:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 14:35:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-12-14 14:35:45,377 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 28 [2022-12-14 14:35:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:35:45,377 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-12-14 14:35:45,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 17 states have internal predecessors, (28), 7 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 14:35:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-12-14 14:35:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 14:35:45,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:35:45,379 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 14:35:45,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:35:45,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:35:45,581 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:35:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:35:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash 38185929, now seen corresponding path program 1 times [2022-12-14 14:35:45,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:35:45,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322148479] [2022-12-14 14:35:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:35:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:35:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:35:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:35:51,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:35:51,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322148479] [2022-12-14 14:35:51,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322148479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:35:51,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:35:51,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 14:35:51,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702812873] [2022-12-14 14:35:51,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:35:51,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 14:35:51,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:35:51,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 14:35:51,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:35:51,194 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 9 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 14:35:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:35:52,731 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2022-12-14 14:35:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:35:52,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 37 [2022-12-14 14:35:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:35:52,733 INFO L225 Difference]: With dead ends: 58 [2022-12-14 14:35:52,733 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 14:35:52,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:35:52,734 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:35:52,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 175 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 14:35:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 14:35:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-12-14 14:35:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 14:35:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-12-14 14:35:52,746 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 37 [2022-12-14 14:35:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:35:52,747 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-12-14 14:35:52,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 14:35:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-12-14 14:35:52,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 14:35:52,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:35:52,748 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:35:52,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:35:52,748 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:35:52,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:35:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1828368370, now seen corresponding path program 1 times [2022-12-14 14:35:52,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:35:52,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933444996] [2022-12-14 14:35:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:35:52,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:35:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:35:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 14:35:53,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:35:53,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933444996] [2022-12-14 14:35:53,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933444996] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:35:53,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:35:53,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:35:53,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528204357] [2022-12-14 14:35:53,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:35:53,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:35:53,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:35:53,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:35:53,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:35:53,379 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 14:35:54,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:35:54,135 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-12-14 14:35:54,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:35:54,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43 [2022-12-14 14:35:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:35:54,137 INFO L225 Difference]: With dead ends: 62 [2022-12-14 14:35:54,137 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 14:35:54,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:35:54,138 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 12 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:35:54,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 171 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:35:54,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 14:35:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-12-14 14:35:54,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 14:35:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-12-14 14:35:54,151 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 43 [2022-12-14 14:35:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:35:54,151 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-12-14 14:35:54,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 14:35:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-12-14 14:35:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 14:35:54,152 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:35:54,152 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:35:54,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:35:54,152 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:35:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:35:54,153 INFO L85 PathProgramCache]: Analyzing trace with hash -835320286, now seen corresponding path program 1 times [2022-12-14 14:35:54,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:35:54,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483494719] [2022-12-14 14:35:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:35:54,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:35:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:35:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 14:35:57,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:35:57,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483494719] [2022-12-14 14:35:57,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483494719] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:35:57,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107587934] [2022-12-14 14:35:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:35:57,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:35:57,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:35:57,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:35:57,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5869d1fd-a869-4271-92f8-49d102db63b2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:35:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:35:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 122 conjunts are in the unsatisfiable core [2022-12-14 14:35:57,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:35:57,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 14:35:58,038 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 14:35:58,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2022-12-14 14:35:58,068 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 14:35:58,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2022-12-14 14:36:00,389 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_insert_after_~after#1.base_BEFORE_CALL_23| Int)) (and (not (= |v_ULTIMATE.start_aws_linked_list_insert_after_~after#1.base_BEFORE_CALL_23| 0)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_insert_after_~after#1.base_BEFORE_CALL_23|) 0) |v_ULTIMATE.start_aws_linked_list_insert_after_~after#1.base_BEFORE_CALL_23|)))) is different from true [2022-12-14 14:36:02,670 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_insert_after_~after#1.base_BEFORE_CALL_24| Int)) (and (not (= |v_ULTIMATE.start_aws_linked_list_insert_after_~after#1.base_BEFORE_CALL_24| 0)) (not (= |v_ULTIMATE.start_aws_linked_list_insert_after_~after#1.base_BEFORE_CALL_24| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_insert_after_~after#1.base_BEFORE_CALL_24|) 0))))) is different from true [2022-12-14 14:36:05,072 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_insert_after_~after#1.base_BEFORE_CALL_25| Int)) (and (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_insert_after_~after#1.base_BEFORE_CALL_25|) 0) |v_ULTIMATE.start_aws_linked_list_insert_after_~after#1.base_BEFORE_CALL_25|)) (not (= |v_ULTIMATE.start_aws_linked_list_insert_after_~after#1.base_BEFORE_CALL_25| 0)))) is different from true [2022-12-14 14:36:07,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:07,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 118 [2022-12-14 14:36:07,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:07,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:07,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-12-14 14:36:07,798 INFO L321 Elim1Store]: treesize reduction 67, result has 19.3 percent of original size [2022-12-14 14:36:07,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 125 [2022-12-14 14:36:07,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 99 treesize of output 76 [2022-12-14 14:36:07,848 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 23 [2022-12-14 14:36:07,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-12-14 14:36:07,923 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 25 [2022-12-14 14:36:07,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-12-14 14:36:07,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 19 [2022-12-14 14:36:08,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:08,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2022-12-14 14:36:08,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-12-14 14:36:17,743 INFO L321 Elim1Store]: treesize reduction 61, result has 24.7 percent of original size [2022-12-14 14:36:17,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 111 [2022-12-14 14:36:17,850 INFO L321 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2022-12-14 14:36:17,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 65 treesize of output 37 [2022-12-14 14:36:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 8 not checked. [2022-12-14 14:36:18,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:36:31,780 INFO L321 Elim1Store]: treesize reduction 49, result has 50.5 percent of original size [2022-12-14 14:36:31,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 6680 treesize of output 5498 [2022-12-14 14:36:32,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:36:32,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 751811 treesize of output 714343 [2022-12-14 14:36:34,534 INFO L217 Elim1Store]: Index analysis took 103 ms [2022-12-14 14:36:35,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:36:35,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 713752 treesize of output 699945 [2022-12-14 14:36:37,556 INFO L217 Elim1Store]: Index analysis took 134 ms [2022-12-14 14:36:38,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:36:38,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 746991 treesize of output 735159 [2022-12-14 14:36:46,127 WARN L233 SmtUtils]: Spent 7.72s on a formula simplification. DAG size of input: 1525 DAG size of output: 1519 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:36:47,511 INFO L217 Elim1Store]: Index analysis took 119 ms [2022-12-14 14:36:48,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:36:48,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 774653 treesize of output 763315 [2022-12-14 14:36:57,057 WARN L233 SmtUtils]: Spent 8.66s on a formula simplification. DAG size of input: 1611 DAG size of output: 1600 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)