./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/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_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/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_704b1b94-90ce-4789-8908-7753a8723dad/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 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- 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 14:27:56,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:27:56,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:27:56,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:27:56,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:27:56,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:27:56,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:27:56,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:27:56,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:27:56,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:27:56,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:27:56,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:27:56,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:27:56,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:27:56,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:27:56,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:27:56,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:27:56,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:27:56,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:27:56,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:27:56,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:27:56,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:27:56,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:27:56,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:27:56,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:27:56,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:27:56,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:27:56,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:27:56,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:27:56,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:27:56,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:27:56,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:27:56,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:27:56,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:27:56,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:27:56,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:27:56,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:27:56,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:27:56,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:27:56,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:27:56,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:27:56,873 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 14:27:56,894 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:27:56,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:27:56,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:27:56,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:27:56,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:27:56,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:27:56,896 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:27:56,896 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:27:56,896 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:27:56,896 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:27:56,897 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:27:56,897 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:27:56,897 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:27:56,897 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:27:56,897 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:27:56,898 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:27:56,898 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:27:56,898 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:27:56,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:27:56,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:27:56,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:27:56,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:27:56,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:27:56,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:27:56,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:27:56,900 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:27:56,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:27:56,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:27:56,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:27:56,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:27:56,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:27:56,901 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:27:56,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:27:56,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:27:56,902 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:27:56,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:27:56,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:27:56,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:27:56,902 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_704b1b94-90ce-4789-8908-7753a8723dad/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2022-12-14 14:27:57,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:27:57,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:27:57,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:27:57,117 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:27:57,117 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:27:57,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-12-14 14:27:59,725 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:28:00,056 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:28:00,057 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-12-14 14:28:00,079 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/data/1c6d35bd3/cdd00b08090b44f5b98d6f2b7809a2d3/FLAG0dfd4f163 [2022-12-14 14:28:00,091 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/data/1c6d35bd3/cdd00b08090b44f5b98d6f2b7809a2d3 [2022-12-14 14:28:00,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:28:00,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:28:00,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:28:00,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:28:00,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:28:00,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:28:00" (1/1) ... [2022-12-14 14:28:00,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64967060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:00, skipping insertion in model container [2022-12-14 14:28:00,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:28:00" (1/1) ... [2022-12-14 14:28:00,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:28:00,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:28:00,362 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_704b1b94-90ce-4789-8908-7753a8723dad/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-12-14 14:28:00,368 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_704b1b94-90ce-4789-8908-7753a8723dad/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-12-14 14:28:00,989 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 14:28:00,993 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:00,993 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:00,994 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:00,994 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:00,995 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,005 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,005 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,006 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,007 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,008 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,009 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,010 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,010 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,061 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:28:01,061 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:28:01,062 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:28:01,066 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 14:28:01,067 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 14:28:01,068 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 14:28:01,265 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 14:28:01,266 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 14:28:01,267 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 14:28:01,268 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 14:28:01,268 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 14:28:01,270 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 14:28:01,270 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 14:28:01,271 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 14:28:01,272 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 14:28:01,272 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 14:28:01,273 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 14:28:01,390 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 14:28:01,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:28:01,420 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:28:01,430 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_704b1b94-90ce-4789-8908-7753a8723dad/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-12-14 14:28:01,431 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_704b1b94-90ce-4789-8908-7753a8723dad/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-12-14 14:28:01,461 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 14:28:01,463 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,464 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,464 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,464 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,465 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,471 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,471 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,472 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,473 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,473 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,474 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,474 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,475 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:28:01,480 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:28:01,481 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:28:01,481 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:28:01,484 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 14:28:01,485 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 14:28:01,485 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 14:28:01,503 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 14:28:01,504 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 14:28:01,505 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 14:28:01,506 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 14:28:01,506 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 14:28:01,507 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 14:28:01,508 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 14:28:01,508 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 14:28:01,508 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 14:28:01,509 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 14:28:01,509 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 14:28:01,527 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 14:28:01,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:28:01,692 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:28:01,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01 WrapperNode [2022-12-14 14:28:01,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:28:01,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:28:01,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:28:01,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:28:01,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01" (1/1) ... [2022-12-14 14:28:01,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01" (1/1) ... [2022-12-14 14:28:01,781 INFO L138 Inliner]: procedures = 679, calls = 1044, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 133 [2022-12-14 14:28:01,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:28:01,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:28:01,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:28:01,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:28:01,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01" (1/1) ... [2022-12-14 14:28:01,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01" (1/1) ... [2022-12-14 14:28:01,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01" (1/1) ... [2022-12-14 14:28:01,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01" (1/1) ... [2022-12-14 14:28:01,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01" (1/1) ... [2022-12-14 14:28:01,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01" (1/1) ... [2022-12-14 14:28:01,813 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01" (1/1) ... [2022-12-14 14:28:01,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01" (1/1) ... [2022-12-14 14:28:01,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:28:01,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:28:01,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:28:01,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:28:01,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01" (1/1) ... [2022-12-14 14:28:01,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:28:01,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:28:01,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:28:01,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:28:01,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 14:28:01,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 14:28:01,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 14:28:01,885 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 14:28:01,885 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 14:28:01,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 14:28:01,885 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-14 14:28:01,885 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-14 14:28:01,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:28:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 14:28:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_front [2022-12-14 14:28:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_front [2022-12-14 14:28:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:28:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:28:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-12-14 14:28:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-12-14 14:28:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 14:28:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 14:28:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 14:28:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 14:28:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 14:28:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 14:28:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 14:28:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-12-14 14:28:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-12-14 14:28:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:28:02,079 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:28:02,081 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:28:02,304 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:28:02,398 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:28:02,399 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 14:28:02,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:28:02 BoogieIcfgContainer [2022-12-14 14:28:02,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:28:02,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:28:02,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:28:02,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:28:02,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:28:00" (1/3) ... [2022-12-14 14:28:02,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f6978e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:28:02, skipping insertion in model container [2022-12-14 14:28:02,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:28:01" (2/3) ... [2022-12-14 14:28:02,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f6978e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:28:02, skipping insertion in model container [2022-12-14 14:28:02,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:28:02" (3/3) ... [2022-12-14 14:28:02,407 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2022-12-14 14:28:02,420 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:28:02,420 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:28:02,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:28:02,471 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;@2a692748, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:28:02,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:28:02,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 14:28:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 14:28:02,481 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:28:02,482 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:28:02,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:28:02,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:28:02,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1481258301, now seen corresponding path program 1 times [2022-12-14 14:28:02,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:28:02,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189178745] [2022-12-14 14:28:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:02,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:28:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 14:28:03,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:28:03,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189178745] [2022-12-14 14:28:03,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189178745] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:28:03,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162092591] [2022-12-14 14:28:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:03,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:03,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:28:03,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:28:03,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:28:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:03,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-14 14:28:03,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:28:03,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:28:03,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:28:03,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-12-14 14:28:03,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-12-14 14:28:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 14:28:05,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:28:05,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162092591] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:28:05,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:28:05,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2022-12-14 14:28:05,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494477825] [2022-12-14 14:28:05,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:28:05,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 14:28:05,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:28:05,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 14:28:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-12-14 14:28:05,541 INFO L87 Difference]: Start difference. First operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 14:28:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:28:06,397 INFO L93 Difference]: Finished difference Result 188 states and 265 transitions. [2022-12-14 14:28:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 14:28:06,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2022-12-14 14:28:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:28:06,404 INFO L225 Difference]: With dead ends: 188 [2022-12-14 14:28:06,404 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 14:28:06,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-12-14 14:28:06,409 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 75 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:28:06,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 347 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 14:28:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 14:28:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-12-14 14:28:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 65 states have internal predecessors, (76), 46 states have call successors, (46), 15 states have call predecessors, (46), 15 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-14 14:28:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2022-12-14 14:28:06,455 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 52 [2022-12-14 14:28:06,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:28:06,456 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2022-12-14 14:28:06,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 14:28:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2022-12-14 14:28:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 14:28:06,458 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:28:06,458 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:28:06,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:28:06,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:06,660 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:28:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:28:06,662 INFO L85 PathProgramCache]: Analyzing trace with hash 12802211, now seen corresponding path program 1 times [2022-12-14 14:28:06,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:28:06,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938578618] [2022-12-14 14:28:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:06,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:28:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 14:28:06,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:28:06,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938578618] [2022-12-14 14:28:06,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938578618] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:28:06,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957167656] [2022-12-14 14:28:06,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:06,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:06,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:28:06,868 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:28:06,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:28:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:06,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-14 14:28:07,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:28:07,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 14:28:07,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:28:07,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:28:07,190 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 14:28:07,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 14:28:07,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:07,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:07,199 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-12-14 14:28:07,203 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:28:07,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:07,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-12-14 14:28:07,221 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 14:28:07,302 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 14:28:07,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 140 [2022-12-14 14:28:07,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:07,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:07,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:07,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 124 [2022-12-14 14:28:07,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:07,319 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2022-12-14 14:28:07,327 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 16 treesize of output 15 [2022-12-14 14:28:07,337 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-12-14 14:28:07,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 14:28:07,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2022-12-14 14:28:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 14:28:09,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:28:14,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:14,492 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 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-14 14:28:14,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:14,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 379 treesize of output 319 [2022-12-14 14:28:14,507 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 330 treesize of output 314 [2022-12-14 14:28:14,514 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 114 treesize of output 106 [2022-12-14 14:28:14,810 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 7 treesize of output 3 [2022-12-14 14:28:14,819 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 7 treesize of output 3 [2022-12-14 14:28:14,843 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:14,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 66 treesize of output 74 [2022-12-14 14:28:14,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:14,894 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 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-14 14:28:14,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:14,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 195 treesize of output 169 [2022-12-14 14:28:14,908 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 156 treesize of output 148 [2022-12-14 14:28:14,914 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 73 treesize of output 69 [2022-12-14 14:28:14,939 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 7 treesize of output 3 [2022-12-14 14:28:14,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:14,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 60 treesize of output 70 [2022-12-14 14:28:15,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-12-14 14:28:15,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:15,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 73 treesize of output 73 [2022-12-14 14:28:15,042 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 61 treesize of output 59 [2022-12-14 14:28:15,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-12-14 14:28:15,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 257 treesize of output 227 [2022-12-14 14:28:15,087 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 152 treesize of output 148 [2022-12-14 14:28:15,096 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 148 treesize of output 146 [2022-12-14 14:28:15,158 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 6 treesize of output 4 [2022-12-14 14:28:15,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 14:28:15,201 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 6 treesize of output 4 [2022-12-14 14:28:15,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 59 treesize of output 71 [2022-12-14 14:28:15,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,251 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 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-14 14:28:15,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:15,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 75 treesize of output 75 [2022-12-14 14:28:15,267 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 50 treesize of output 46 [2022-12-14 14:28:15,283 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 7 treesize of output 3 [2022-12-14 14:28:15,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 51 [2022-12-14 14:28:15,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2022-12-14 14:28:15,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:15,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 79 treesize of output 79 [2022-12-14 14:28:15,376 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 63 treesize of output 59 [2022-12-14 14:28:15,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2022-12-14 14:28:15,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 459 treesize of output 395 [2022-12-14 14:28:15,424 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 330 treesize of output 314 [2022-12-14 14:28:15,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 306 [2022-12-14 14:28:15,483 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 8 treesize of output 4 [2022-12-14 14:28:15,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 50 [2022-12-14 14:28:15,547 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 8 treesize of output 4 [2022-12-14 14:28:15,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 57 treesize of output 69 [2022-12-14 14:28:15,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,618 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 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-14 14:28:15,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:15,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 75 treesize of output 75 [2022-12-14 14:28:15,630 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 50 treesize of output 46 [2022-12-14 14:28:15,655 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 7 treesize of output 3 [2022-12-14 14:28:15,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:15,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 51 [2022-12-14 14:28:15,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957167656] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:28:15,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419736538] [2022-12-14 14:28:16,010 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 14:28:16,010 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:28:16,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:28:16,018 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:28:16,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:28:16,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,096 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 14:28:16,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 14:28:16,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 14:28:16,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,332 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 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 14:28:16,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,356 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 39 treesize of output 30 [2022-12-14 14:28:16,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:28:16,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,390 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 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 14:28:16,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 14:28:16,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:16,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:16,483 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 14:28:16,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 14:28:16,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:28:16,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:16,546 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 14:28:16,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 14:28:16,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,608 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 14:28:16,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 14:28:16,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-12-14 14:28:16,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:28:16,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 14:28:16,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:16,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 14:28:16,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:28:16,742 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 6 treesize of output 5 [2022-12-14 14:28:16,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 14:28:16,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:28:16,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:16,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 14:28:16,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:28:16,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:28:16,842 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 6 treesize of output 5 [2022-12-14 14:28:16,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 14:28:16,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:28:16,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 14:28:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:28:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:16,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:28:17,493 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-12-14 14:28:17,698 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 44 for LOIs [2022-12-14 14:28:17,766 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-12-14 14:28:17,915 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 30 for LOIs [2022-12-14 14:28:17,919 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 14:28:17,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:28:22,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1419736538] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:28:22,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:28:22,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [5, 11] total 35 [2022-12-14 14:28:22,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246855477] [2022-12-14 14:28:22,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:28:22,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 14:28:22,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:28:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 14:28:22,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1651, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 14:28:22,365 INFO L87 Difference]: Start difference. First operand 125 states and 166 transitions. Second operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 14:28:24,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:28:24,688 INFO L93 Difference]: Finished difference Result 182 states and 240 transitions. [2022-12-14 14:28:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 14:28:24,689 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 53 [2022-12-14 14:28:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:28:24,691 INFO L225 Difference]: With dead ends: 182 [2022-12-14 14:28:24,691 INFO L226 Difference]: Without dead ends: 129 [2022-12-14 14:28:24,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 98 SyntacticMatches, 17 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=179, Invalid=1891, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 14:28:24,692 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 42 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:28:24,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 327 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 14:28:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-14 14:28:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-12-14 14:28:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 65 states have (on average 1.2) internal successors, (78), 68 states have internal predecessors, (78), 46 states have call successors, (46), 16 states have call predecessors, (46), 17 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-12-14 14:28:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2022-12-14 14:28:24,725 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 53 [2022-12-14 14:28:24,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:28:24,726 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2022-12-14 14:28:24,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 14:28:24,726 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2022-12-14 14:28:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 14:28:24,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:28:24,727 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:28:24,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:28:24,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 14:28:24,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:28:24,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:28:24,930 INFO L85 PathProgramCache]: Analyzing trace with hash -158597409, now seen corresponding path program 1 times [2022-12-14 14:28:24,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:28:24,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504568344] [2022-12-14 14:28:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:24,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:28:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:28:25,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:28:25,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504568344] [2022-12-14 14:28:25,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504568344] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:28:25,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797327819] [2022-12-14 14:28:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:25,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:25,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:28:25,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:28:25,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:28:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:25,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:28:25,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:28:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 14:28:25,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:28:25,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797327819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:28:25,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:28:25,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 14:28:25,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265713232] [2022-12-14 14:28:25,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:28:25,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:28:25,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:28:25,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:28:25,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:28:25,318 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 14:28:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:28:25,511 INFO L93 Difference]: Finished difference Result 241 states and 319 transitions. [2022-12-14 14:28:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:28:25,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 55 [2022-12-14 14:28:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:28:25,513 INFO L225 Difference]: With dead ends: 241 [2022-12-14 14:28:25,513 INFO L226 Difference]: Without dead ends: 129 [2022-12-14 14:28:25,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-12-14 14:28:25,515 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 44 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:28:25,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 373 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:28:25,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-14 14:28:25,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-12-14 14:28:25,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 68 states have internal predecessors, (76), 46 states have call successors, (46), 16 states have call predecessors, (46), 17 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-12-14 14:28:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 168 transitions. [2022-12-14 14:28:25,548 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 168 transitions. Word has length 55 [2022-12-14 14:28:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:28:25,549 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 168 transitions. [2022-12-14 14:28:25,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 14:28:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 168 transitions. [2022-12-14 14:28:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 14:28:25,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:28:25,550 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:28:25,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:28:25,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:25,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:28:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:28:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash -607325849, now seen corresponding path program 1 times [2022-12-14 14:28:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:28:25,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48049120] [2022-12-14 14:28:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:25,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:28:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:28:26,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:28:26,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48049120] [2022-12-14 14:28:26,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48049120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:28:26,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105707723] [2022-12-14 14:28:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:26,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:26,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:28:26,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:28:26,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:28:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:26,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 14:28:26,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:28:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 14:28:26,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:28:26,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105707723] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:28:26,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:28:26,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-12-14 14:28:26,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563497033] [2022-12-14 14:28:26,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:28:26,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 14:28:26,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:28:26,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 14:28:26,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-12-14 14:28:26,296 INFO L87 Difference]: Start difference. First operand 129 states and 168 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 14:28:26,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:28:26,534 INFO L93 Difference]: Finished difference Result 259 states and 345 transitions. [2022-12-14 14:28:26,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:28:26,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 57 [2022-12-14 14:28:26,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:28:26,536 INFO L225 Difference]: With dead ends: 259 [2022-12-14 14:28:26,536 INFO L226 Difference]: Without dead ends: 145 [2022-12-14 14:28:26,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:28:26,537 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 73 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:28:26,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 417 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:28:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-14 14:28:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2022-12-14 14:28:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 67 states have (on average 1.164179104477612) internal successors, (78), 70 states have internal predecessors, (78), 46 states have call successors, (46), 16 states have call predecessors, (46), 17 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-12-14 14:28:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 170 transitions. [2022-12-14 14:28:26,577 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 170 transitions. Word has length 57 [2022-12-14 14:28:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:28:26,578 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 170 transitions. [2022-12-14 14:28:26,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 14:28:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 170 transitions. [2022-12-14 14:28:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 14:28:26,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:28:26,579 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:28:26,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:28:26,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:26,781 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:28:26,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:28:26,782 INFO L85 PathProgramCache]: Analyzing trace with hash 624523636, now seen corresponding path program 1 times [2022-12-14 14:28:26,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:28:26,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225315939] [2022-12-14 14:28:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:26,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:28:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:28:27,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:28:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225315939] [2022-12-14 14:28:27,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225315939] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:28:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283856509] [2022-12-14 14:28:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:27,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:27,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:28:27,030 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:28:27,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:28:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:27,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:28:27,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:28:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 14:28:27,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:28:27,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283856509] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:28:27,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:28:27,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-12-14 14:28:27,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469672664] [2022-12-14 14:28:27,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:28:27,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:28:27,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:28:27,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:28:27,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:28:27,184 INFO L87 Difference]: Start difference. First operand 131 states and 170 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 14:28:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:28:27,260 INFO L93 Difference]: Finished difference Result 251 states and 337 transitions. [2022-12-14 14:28:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:28:27,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 58 [2022-12-14 14:28:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:28:27,262 INFO L225 Difference]: With dead ends: 251 [2022-12-14 14:28:27,262 INFO L226 Difference]: Without dead ends: 143 [2022-12-14 14:28:27,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:28:27,263 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:28:27,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 147 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:28:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-14 14:28:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2022-12-14 14:28:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 72 states have internal predecessors, (80), 46 states have call successors, (46), 16 states have call predecessors, (46), 17 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-12-14 14:28:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 172 transitions. [2022-12-14 14:28:27,300 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 172 transitions. Word has length 58 [2022-12-14 14:28:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:28:27,300 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 172 transitions. [2022-12-14 14:28:27,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 14:28:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 172 transitions. [2022-12-14 14:28:27,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 14:28:27,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:28:27,303 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:28:27,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:28:27,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:27,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:28:27,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:28:27,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1737423988, now seen corresponding path program 1 times [2022-12-14 14:28:27,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:28:27,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890069801] [2022-12-14 14:28:27,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:27,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:28:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 14:28:27,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:28:27,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890069801] [2022-12-14 14:28:27,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890069801] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:28:27,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631803695] [2022-12-14 14:28:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:27,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:27,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:28:27,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:28:27,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:28:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:27,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-14 14:28:27,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:28:27,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 14:28:27,959 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 14:28:27,967 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:28:27,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 14:28:27,973 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 14:28:27,982 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 14:28:27,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 14:28:28,037 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 14:28:28,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 114 [2022-12-14 14:28:28,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:28,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 90 [2022-12-14 14:28:28,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 14:28:28,055 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 14 treesize of output 13 [2022-12-14 14:28:28,063 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 21 [2022-12-14 14:28:28,067 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 11 treesize of output 7 [2022-12-14 14:28:36,486 WARN L233 SmtUtils]: Spent 6.66s 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 14:28:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:28:40,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:28:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:28:42,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631803695] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:28:42,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1878183320] [2022-12-14 14:28:42,610 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-12-14 14:28:42,610 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:28:42,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:28:42,610 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:28:42,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:28:42,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,648 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 14:28:42,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 46 [2022-12-14 14:28:42,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,694 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 14:28:42,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 14:28:42,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:28:42,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,892 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 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 14:28:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,915 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 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 14:28:42,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,938 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 39 treesize of output 30 [2022-12-14 14:28:42,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 14:28:42,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:42,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,044 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-12-14 14:28:43,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-12-14 14:28:43,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,117 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 14:28:43,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 14:28:43,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 14:28:43,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:28:43,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:43,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 14:28:43,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:43,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:43,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:43,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:43,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:43,674 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 14:28:43,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-12-14 14:28:43,919 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-12-14 14:28:43,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 641 treesize of output 652 [2022-12-14 14:28:44,216 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-12-14 14:28:44,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 644 treesize of output 662 [2022-12-14 14:28:44,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:44,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:44,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:44,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:44,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:44,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:44,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:44,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:44,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:44,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:44,441 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-12-14 14:28:44,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 684 treesize of output 687 [2022-12-14 14:28:44,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:44,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:28:44,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:44,536 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 14:28:44,536 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 678 treesize of output 631 [2022-12-14 14:28:44,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:44,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:44,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 652 treesize of output 631 [2022-12-14 14:28:48,787 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 6 treesize of output 5 [2022-12-14 14:28:48,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 14:28:48,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:48,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:28:48,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:48,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:48,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 14:28:48,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:48,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:28:48,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:48,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:28:48,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:48,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:48,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 14:28:48,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:48,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:28:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:48,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:28:48,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:48,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:28:49,122 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 79 for LOIs [2022-12-14 14:28:49,452 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 49 for LOIs [2022-12-14 14:28:49,532 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 79 for LOIs [2022-12-14 14:28:49,862 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-12-14 14:28:49,867 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 14:28:49,878 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-12-14 14:28:49,924 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:28:55,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1878183320] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:28:55,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:28:55,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [6, 16, 7] total 53 [2022-12-14 14:28:55,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634986939] [2022-12-14 14:28:55,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:28:55,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 14:28:55,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:28:55,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 14:28:55,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2546, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 14:28:55,856 INFO L87 Difference]: Start difference. First operand 133 states and 172 transitions. Second operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 14:29:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:29:00,687 INFO L93 Difference]: Finished difference Result 257 states and 333 transitions. [2022-12-14 14:29:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 14:29:00,688 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 61 [2022-12-14 14:29:00,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:29:00,689 INFO L225 Difference]: With dead ends: 257 [2022-12-14 14:29:00,689 INFO L226 Difference]: Without dead ends: 147 [2022-12-14 14:29:00,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 119 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=270, Invalid=3152, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 14:29:00,690 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 70 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:29:00,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 319 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 14:29:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-14 14:29:00,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2022-12-14 14:29:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 80 states have internal predecessors, (89), 48 states have call successors, (48), 18 states have call predecessors, (48), 20 states have return successors, (50), 46 states have call predecessors, (50), 46 states have call successors, (50) [2022-12-14 14:29:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 187 transitions. [2022-12-14 14:29:00,738 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 187 transitions. Word has length 61 [2022-12-14 14:29:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:29:00,738 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 187 transitions. [2022-12-14 14:29:00,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 14:29:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 187 transitions. [2022-12-14 14:29:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 14:29:00,739 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:29:00,739 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:29:00,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 14:29:00,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 14:29:00,940 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:29:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:29:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1736212780, now seen corresponding path program 1 times [2022-12-14 14:29:00,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:29:00,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333305737] [2022-12-14 14:29:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:29:00,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:29:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:29:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:29:01,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:29:01,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333305737] [2022-12-14 14:29:01,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333305737] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:29:01,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661692194] [2022-12-14 14:29:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:29:01,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:29:01,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:29:01,482 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:29:01,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:29:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:29:01,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-14 14:29:01,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:29:01,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 14:29:01,774 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 14:29:01,781 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:29:01,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 14:29:01,785 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 14:29:01,791 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 14:29:01,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 14:29:01,835 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-12-14 14:29:01,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 99 [2022-12-14 14:29:01,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:01,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 71 [2022-12-14 14:29:01,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 14:29:01,920 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| Int) (v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56|))) (let ((.cse0 (select .cse1 0))) (and (not (= .cse0 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| v_DerPreprocessor_21) .cse0 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| v_DerPreprocessor_21) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56|)) (= (select .cse1 24) (select v_DerPreprocessor_21 24)))))) is different from true [2022-12-14 14:29:02,057 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| Int) (v_DerPreprocessor_22 (Array Int Int)) (v_DerPreprocessor_23 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57|))) (let ((.cse0 (select .cse1 0))) (and (not (= |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| .cse0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| v_DerPreprocessor_23) .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| v_DerPreprocessor_23) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_23 24)) (not (= .cse0 0)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| Int) (v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56|))) (let ((.cse2 (select .cse3 0))) (and (not (= .cse2 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| v_DerPreprocessor_21) .cse2 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| v_DerPreprocessor_21) .cse2) (select |c_#memory_$Pointer$.base| .cse2)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56|)) (= (select .cse3 24) (select v_DerPreprocessor_21 24))))))) is different from true [2022-12-14 14:29:02,421 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| Int) (v_DerPreprocessor_22 (Array Int Int)) (v_DerPreprocessor_23 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57|))) (let ((.cse0 (select .cse1 0))) (and (not (= |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| .cse0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| v_DerPreprocessor_23) .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| v_DerPreprocessor_23) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_23 24)) (not (= .cse0 0)))))) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_40 Int) (v_DerPreprocessor_24 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_40))) (let ((.cse2 (select .cse3 0))) (and (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_24) v_aws_linked_list_front_~list.base_BEFORE_CALL_40 v_DerPreprocessor_25) .cse2 v_DerPreprocessor_24) v_aws_linked_list_front_~list.base_BEFORE_CALL_40 v_DerPreprocessor_25) .cse2)) (not (= .cse2 0)) (= (select .cse3 24) (select v_DerPreprocessor_25 24)) (not (= v_aws_linked_list_front_~list.base_BEFORE_CALL_40 .cse2)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| Int) (v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56|))) (let ((.cse4 (select .cse5 0))) (and (not (= .cse4 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| v_DerPreprocessor_21) .cse4 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| v_DerPreprocessor_21) .cse4) (select |c_#memory_$Pointer$.base| .cse4)) (not (= .cse4 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56|)) (= (select .cse5 24) (select v_DerPreprocessor_21 24))))))) is different from true [2022-12-14 14:29:03,161 INFO L321 Elim1Store]: treesize reduction 224, result has 0.4 percent of original size [2022-12-14 14:29:03,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 182 [2022-12-14 14:29:03,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-12-14 14:29:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 6 not checked. [2022-12-14 14:29:03,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:29:03,564 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_828 Int) (v_ArrVal_829 (Array Int Int)) (v_ArrVal_830 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_829) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_830) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_828)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|) 0))) is different from false [2022-12-14 14:29:03,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:29:03,571 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 1 case distinctions, treesize of input 40 treesize of output 33 [2022-12-14 14:29:03,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:29:03,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 316 treesize of output 292 [2022-12-14 14:29:03,590 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 306 treesize of output 298 [2022-12-14 14:29:03,598 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 298 treesize of output 294 [2022-12-14 14:29:03,696 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 6 treesize of output 4 [2022-12-14 14:29:03,709 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 24 treesize of output 22 [2022-12-14 14:29:03,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:29:03,722 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 105 treesize of output 99 [2022-12-14 14:29:04,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661692194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:29:04,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1116515845] [2022-12-14 14:29:04,064 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-12-14 14:29:04,064 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:29:04,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:29:04,065 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:29:04,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:29:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,117 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 14:29:04,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 14:29:04,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 14:29:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,308 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 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 14:29:04,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,330 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 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 14:29:04,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:29:04,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,374 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 39 treesize of output 30 [2022-12-14 14:29:04,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:29:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,475 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-12-14 14:29:04,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-12-14 14:29:04,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,548 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 14:29:04,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 14:29:04,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 14:29:04,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 14:29:04,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:04,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 14:29:04,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:04,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:04,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:04,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:04,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:05,142 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 14:29:05,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-12-14 14:29:05,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:05,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:05,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:05,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:05,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:05,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:05,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:05,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:05,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:05,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:05,409 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-12-14 14:29:05,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 692 treesize of output 695 [2022-12-14 14:29:05,637 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-12-14 14:29:05,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 652 treesize of output 682 [2022-12-14 14:29:05,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:05,687 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 14:29:05,687 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 684 treesize of output 637 [2022-12-14 14:29:05,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 658 treesize of output 637 [2022-12-14 14:29:05,786 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-12-14 14:29:05,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 645 treesize of output 656 [2022-12-14 14:29:06,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:06,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:29:06,713 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 6 treesize of output 5 [2022-12-14 14:29:06,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 14:29:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:06,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:29:06,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:06,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 14:29:06,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:06,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:06,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 14:29:06,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:06,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:29:06,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:06,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:29:06,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:06,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:29:06,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:06,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:06,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 14:29:06,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:06,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:29:07,215 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-12-14 14:29:07,557 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 43 for LOIs [2022-12-14 14:29:07,615 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-12-14 14:29:08,246 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 61 for LOIs [2022-12-14 14:29:08,261 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 14:29:08,275 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 14:29:08,330 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:29:14,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1116515845] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:29:14,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:29:14,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 18] total 54 [2022-12-14 14:29:14,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143053857] [2022-12-14 14:29:14,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:29:14,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 14:29:14,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:29:14,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 14:29:14,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3415, Unknown=15, NotChecked=484, Total=4160 [2022-12-14 14:29:14,523 INFO L87 Difference]: Start difference. First operand 145 states and 187 transitions. Second operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 14:29:20,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:29:20,195 INFO L93 Difference]: Finished difference Result 283 states and 368 transitions. [2022-12-14 14:29:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 14:29:20,196 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 63 [2022-12-14 14:29:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:29:20,196 INFO L225 Difference]: With dead ends: 283 [2022-12-14 14:29:20,196 INFO L226 Difference]: Without dead ends: 161 [2022-12-14 14:29:20,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 122 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=353, Invalid=4466, Unknown=27, NotChecked=556, Total=5402 [2022-12-14 14:29:20,198 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 66 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:29:20,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 311 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 14:29:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-12-14 14:29:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2022-12-14 14:29:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 82 states have internal predecessors, (91), 48 states have call successors, (48), 18 states have call predecessors, (48), 20 states have return successors, (50), 46 states have call predecessors, (50), 46 states have call successors, (50) [2022-12-14 14:29:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2022-12-14 14:29:20,243 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 63 [2022-12-14 14:29:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:29:20,243 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2022-12-14 14:29:20,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 14:29:20,244 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2022-12-14 14:29:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 14:29:20,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:29:20,244 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:29:20,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 14:29:20,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 14:29:20,446 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:29:20,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:29:20,447 INFO L85 PathProgramCache]: Analyzing trace with hash -11232857, now seen corresponding path program 1 times [2022-12-14 14:29:20,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:29:20,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342502909] [2022-12-14 14:29:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:29:20,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:29:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:29:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:29:21,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:29:21,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342502909] [2022-12-14 14:29:21,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342502909] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:29:21,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684150004] [2022-12-14 14:29:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:29:21,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:29:21,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:29:21,358 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:29:21,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:29:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:29:21,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 14:29:21,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:29:21,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 14:29:21,650 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 14:29:21,659 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:29:21,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 14:29:21,664 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 14:29:21,673 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 14:29:21,673 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 11 treesize of output 11 [2022-12-14 14:29:21,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:21,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 19 [2022-12-14 14:29:21,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2022-12-14 14:29:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:29:22,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:29:22,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:29:22,514 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 1 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 14:29:22,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:29:22,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 267 treesize of output 277 [2022-12-14 14:29:22,533 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 306 treesize of output 298 [2022-12-14 14:29:22,538 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 298 treesize of output 294 [2022-12-14 14:29:22,586 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 6 treesize of output 4 [2022-12-14 14:29:22,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:29:22,597 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 77 treesize of output 77 [2022-12-14 14:29:22,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 14:29:22,657 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 6 treesize of output 4 [2022-12-14 14:29:22,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2022-12-14 14:29:22,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2022-12-14 14:29:22,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684150004] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:29:22,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [792606591] [2022-12-14 14:29:22,860 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-12-14 14:29:22,860 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:29:22,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:29:22,861 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:29:22,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:29:22,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:22,904 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 14:29:22,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 14:29:22,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:22,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 14:29:23,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,068 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 39 treesize of output 30 [2022-12-14 14:29:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,087 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 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 14:29:23,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,102 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 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 14:29:23,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:29:23,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,183 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 14:29:23,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 14:29:23,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 14:29:23,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 14:29:23,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-12-14 14:29:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:29:23,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:23,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 14:29:23,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:23,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:23,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:23,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:23,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:23,729 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 14:29:23,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-12-14 14:29:24,021 INFO L321 Elim1Store]: treesize reduction 192, result has 23.5 percent of original size [2022-12-14 14:29:24,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 646 treesize of output 680 [2022-12-14 14:29:24,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:24,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:24,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:24,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:24,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:24,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:24,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:24,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:24,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:24,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:24,254 INFO L321 Elim1Store]: treesize reduction 233, result has 25.6 percent of original size [2022-12-14 14:29:24,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 18 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 686 treesize of output 689 [2022-12-14 14:29:24,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:24,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:29:24,359 INFO L321 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2022-12-14 14:29:24,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 641 treesize of output 652 [2022-12-14 14:29:24,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:24,408 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 14:29:24,408 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 678 treesize of output 631 [2022-12-14 14:29:24,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 652 treesize of output 631 [2022-12-14 14:29:48,859 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 6 treesize of output 5 [2022-12-14 14:29:48,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 14:29:48,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:48,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:29:48,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:48,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 14:29:48,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:29:48,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:48,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 14:29:48,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:48,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:29:48,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:48,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:48,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 14:29:48,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:48,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:29:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:48,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:29:48,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:29:48,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:29:49,172 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 79 for LOIs [2022-12-14 14:29:49,773 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 103 for LOIs [2022-12-14 14:29:49,938 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 84 for LOIs [2022-12-14 14:29:49,969 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 79 for LOIs [2022-12-14 14:29:50,667 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-12-14 14:29:50,668 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 14:29:50,686 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 14:29:50,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:30:06,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6331#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (exists ((|v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29| Int) (|v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| Int)) (and (not (= (mod (ite (= (+ |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) 0) 0 1) 256) 0)) (<= 0 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) (<= 0 |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|)) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (<= (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|)) 1 0) 0) 0 1) 1) (<= |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29| 0) (<= 0 (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|)) 1 0) 0) 0 1)))) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58| Int)) (and (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 24)) 0) (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58|) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 24)))) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 24))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 24)))))) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-12-14 14:30:06,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:30:06,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:30:06,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-12-14 14:30:06,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513468272] [2022-12-14 14:30:06,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:30:06,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 14:30:06,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:30:06,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 14:30:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4555, Unknown=11, NotChecked=0, Total=4830 [2022-12-14 14:30:06,181 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2022-12-14 14:30:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:30:08,464 INFO L93 Difference]: Finished difference Result 250 states and 329 transitions. [2022-12-14 14:30:08,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 14:30:08,464 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) Word has length 64 [2022-12-14 14:30:08,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:30:08,465 INFO L225 Difference]: With dead ends: 250 [2022-12-14 14:30:08,465 INFO L226 Difference]: Without dead ends: 183 [2022-12-14 14:30:08,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 128 SyntacticMatches, 12 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=435, Invalid=6525, Unknown=12, NotChecked=0, Total=6972 [2022-12-14 14:30:08,467 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 257 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:30:08,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1321 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 14:30:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-14 14:30:08,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 149. [2022-12-14 14:30:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 80 states have (on average 1.175) internal successors, (94), 84 states have internal predecessors, (94), 48 states have call successors, (48), 18 states have call predecessors, (48), 20 states have return successors, (50), 46 states have call predecessors, (50), 46 states have call successors, (50) [2022-12-14 14:30:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 192 transitions. [2022-12-14 14:30:08,516 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 192 transitions. Word has length 64 [2022-12-14 14:30:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:30:08,516 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 192 transitions. [2022-12-14 14:30:08,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2022-12-14 14:30:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 192 transitions. [2022-12-14 14:30:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 14:30:08,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:30:08,517 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:30:08,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 14:30:08,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:30:08,718 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:30:08,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:30:08,719 INFO L85 PathProgramCache]: Analyzing trace with hash -753331591, now seen corresponding path program 1 times [2022-12-14 14:30:08,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:30:08,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915989178] [2022-12-14 14:30:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:30:08,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:30:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:30:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 14:30:08,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:30:08,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915989178] [2022-12-14 14:30:08,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915989178] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:30:08,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91445383] [2022-12-14 14:30:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:30:08,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:30:08,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:30:08,919 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:30:08,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:30:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:30:09,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 14:30:09,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:30:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:30:09,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:30:09,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91445383] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:30:09,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:30:09,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 13 [2022-12-14 14:30:09,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496599052] [2022-12-14 14:30:09,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:30:09,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 14:30:09,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:30:09,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 14:30:09,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 14:30:09,212 INFO L87 Difference]: Start difference. First operand 149 states and 192 transitions. Second operand has 11 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 14:30:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:30:09,507 INFO L93 Difference]: Finished difference Result 289 states and 374 transitions. [2022-12-14 14:30:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 14:30:09,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 67 [2022-12-14 14:30:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:30:09,508 INFO L225 Difference]: With dead ends: 289 [2022-12-14 14:30:09,508 INFO L226 Difference]: Without dead ends: 163 [2022-12-14 14:30:09,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-12-14 14:30:09,509 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 17 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:30:09,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 508 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:30:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-12-14 14:30:09,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 148. [2022-12-14 14:30:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 84 states have internal predecessors, (92), 48 states have call successors, (48), 18 states have call predecessors, (48), 20 states have return successors, (50), 45 states have call predecessors, (50), 46 states have call successors, (50) [2022-12-14 14:30:09,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 190 transitions. [2022-12-14 14:30:09,581 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 190 transitions. Word has length 67 [2022-12-14 14:30:09,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:30:09,581 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 190 transitions. [2022-12-14 14:30:09,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 14:30:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 190 transitions. [2022-12-14 14:30:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 14:30:09,582 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:30:09,582 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:30:09,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 14:30:09,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:30:09,784 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:30:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:30:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1997021130, now seen corresponding path program 1 times [2022-12-14 14:30:09,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:30:09,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103636959] [2022-12-14 14:30:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:30:09,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:30:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:30:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 14:30:10,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:30:10,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103636959] [2022-12-14 14:30:10,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103636959] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:30:10,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781195062] [2022-12-14 14:30:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:30:10,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:30:10,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:30:10,734 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:30:10,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 14:30:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:30:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 112 conjunts are in the unsatisfiable core [2022-12-14 14:30:10,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:30:10,968 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:30:10,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 14:30:10,977 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:30:10,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 14:30:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:30:11,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:00,275 WARN L233 SmtUtils]: Spent 1.03m on a formula simplification. DAG size of input: 50 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:32:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 14:32:09,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781195062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:09,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229825314] [2022-12-14 14:32:09,893 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-12-14 14:32:09,893 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:32:09,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:32:09,894 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:32:09,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:32:09,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,454 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 14:32:10,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 14:32:10,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 14:32:10,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,734 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 39 treesize of output 30 [2022-12-14 14:32:10,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,805 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 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 14:32:10,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:32:10,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,909 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 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 14:32:10,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,989 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 50 treesize of output 28 [2022-12-14 14:32:11,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-12-14 14:32:11,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:32:11,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:11,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 14:32:12,125 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 125 for LOIs [2022-12-14 14:32:12,259 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 14:32:12,265 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 14:32:12,288 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:32:40,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [229825314] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:40,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:32:40,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15, 20, 23] total 63 [2022-12-14 14:32:40,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896273464] [2022-12-14 14:32:40,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:40,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 14:32:40,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:32:40,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 14:32:40,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3624, Unknown=12, NotChecked=0, Total=3906 [2022-12-14 14:32:40,060 INFO L87 Difference]: Start difference. First operand 148 states and 190 transitions. Second operand has 13 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 14:32:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:45,070 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2022-12-14 14:32:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 14:32:45,071 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2022-12-14 14:32:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:45,072 INFO L225 Difference]: With dead ends: 157 [2022-12-14 14:32:45,072 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 14:32:45,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 158 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 138.4s TimeCoverageRelationStatistics Valid=277, Invalid=3743, Unknown=12, NotChecked=0, Total=4032 [2022-12-14 14:32:45,074 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 77 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:45,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 169 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 14:32:45,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 14:32:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-12-14 14:32:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 25 states have call successors, (25), 10 states have call predecessors, (25), 11 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-12-14 14:32:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-12-14 14:32:45,123 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 71 [2022-12-14 14:32:45,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:45,123 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-12-14 14:32:45,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 14:32:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-12-14 14:32:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 14:32:45,124 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:45,124 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:32:45,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 14:32:45,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 14:32:45,326 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:32:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:45,327 INFO L85 PathProgramCache]: Analyzing trace with hash -361396326, now seen corresponding path program 2 times [2022-12-14 14:32:45,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:32:45,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69733433] [2022-12-14 14:32:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:45,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:32:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 14:32:54,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:32:54,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69733433] [2022-12-14 14:32:54,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69733433] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:32:54,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368664735] [2022-12-14 14:32:54,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:32:54,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:54,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:54,047 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:32:54,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 14:32:54,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 14:32:54,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:32:54,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-14 14:32:54,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:54,894 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 14:32:54,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-12-14 14:32:58,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:32:58,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:32:59,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:59,239 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 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-14 14:32:59,426 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:32:59,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-12-14 14:32:59,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:59,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-12-14 14:32:59,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:59,556 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-14 14:32:59,747 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:32:59,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-12-14 14:32:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:59,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-12-14 14:33:00,387 INFO L321 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2022-12-14 14:33:00,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2022-12-14 14:33:01,792 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 14:33:01,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 151 [2022-12-14 14:33:01,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:33:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:33:01,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 147 treesize of output 124 [2022-12-14 14:33:01,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:33:01,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2022-12-14 14:33:01,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 14:33:02,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:33:02,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:33:02,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 23 treesize of output 32 [2022-12-14 14:34:16,175 WARN L233 SmtUtils]: Spent 35.25s on a formula simplification that was a NOOP. DAG size: 196 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:36:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 13 refuted. 2 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:36:02,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:36:15,190 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 188 DAG size of output: 136 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 14:36:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:36:33,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368664735] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:36:33,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554841730] [2022-12-14 14:36:33,517 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-12-14 14:36:33,517 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:36:33,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:36:33,517 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:36:33,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:36:33,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,090 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 14:36:34,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 14:36:34,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 14:36:34,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,408 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 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 14:36:34,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,489 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 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 14:36:34,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,549 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 39 treesize of output 30 [2022-12-14 14:36:34,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:36:34,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:34,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,363 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 14:36:35,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 14:36:35,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:36:35,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-12-14 14:36:35,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 14:36:35,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 14:36:35,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:35,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:35,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 14:36:36,005 INFO L217 Elim1Store]: Index analysis took 109 ms [2022-12-14 14:36:36,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:36,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:36,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:36,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:36,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:36,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:36,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:36,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:36,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:37,301 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 14:36:37,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-12-14 14:36:37,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:37,516 INFO L217 Elim1Store]: Index analysis took 164 ms [2022-12-14 14:36:37,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:37,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:37,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:37,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:37,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:37,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:37,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:37,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:38,812 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-12-14 14:36:38,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 692 treesize of output 695 [2022-12-14 14:36:39,156 INFO L217 Elim1Store]: Index analysis took 284 ms [2022-12-14 14:36:39,784 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-12-14 14:36:39,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 647 treesize of output 658 [2022-12-14 14:36:40,153 INFO L217 Elim1Store]: Index analysis took 316 ms [2022-12-14 14:36:40,924 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-12-14 14:36:40,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 650 treesize of output 668 [2022-12-14 14:36:40,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:41,128 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 14:36:41,129 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-12-14 14:36:41,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:41,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:41,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-12-14 14:36:59,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:59,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:36:59,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 14:36:59,930 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 6 treesize of output 5 [2022-12-14 14:36:59,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:36:59,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:36:59,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:37:00,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:00,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 14:37:00,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:00,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 14:37:00,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:00,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:37:00,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:00,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:37:00,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:00,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:00,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 14:37:00,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:00,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:37:00,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:00,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:37:00,853 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 78 for LOIs [2022-12-14 14:37:01,719 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 101 for LOIs [2022-12-14 14:37:01,913 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 83 for LOIs [2022-12-14 14:37:01,985 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 78 for LOIs [2022-12-14 14:37:02,832 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-12-14 14:37:02,839 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 14:37:02,866 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 14:37:02,928 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:38:11,688 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9176#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (exists ((|v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45| Int) (|v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45| Int)) (and (<= 0 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) (<= |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45| 0) (<= 0 (ite (= (ite (and (= (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|)) 1 0) 0) 0 1)) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|)) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (<= (ite (= (ite (and (= (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|)) 1 0) 0) 0 1) 1) (not (= 0 (mod (ite (= (+ |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45| |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) 0) 0 1) 256))) (<= 0 |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|))) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) 8)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) (<= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) 8)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) 16))) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-12-14 14:38:11,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:38:11,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:38:11,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 7] total 46 [2022-12-14 14:38:11,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589528470] [2022-12-14 14:38:11,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:38:11,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 14:38:11,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:38:11,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 14:38:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=5880, Unknown=85, NotChecked=0, Total=6320 [2022-12-14 14:38:11,691 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 46 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 22 states have call successors, (38), 13 states have call predecessors, (38), 14 states have return successors, (34), 19 states have call predecessors, (34), 20 states have call successors, (34) [2022-12-14 14:38:33,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:38:38,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:38:53,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:39:41,354 WARN L233 SmtUtils]: Spent 35.92s on a formula simplification that was a NOOP. DAG size: 216 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:39:59,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:40:00,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:40:11,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:40:13,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:40:15,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:40:17,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:40:19,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:40:21,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:41:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:41:17,130 INFO L93 Difference]: Finished difference Result 238 states and 306 transitions. [2022-12-14 14:41:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 14:41:17,132 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 22 states have call successors, (38), 13 states have call predecessors, (38), 14 states have return successors, (34), 19 states have call predecessors, (34), 20 states have call successors, (34) Word has length 70 [2022-12-14 14:41:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:41:17,133 INFO L225 Difference]: With dead ends: 238 [2022-12-14 14:41:17,133 INFO L226 Difference]: Without dead ends: 165 [2022-12-14 14:41:17,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 145 SyntacticMatches, 10 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4891 ImplicationChecksByTransitivity, 300.0s TimeCoverageRelationStatistics Valid=878, Invalid=12912, Unknown=252, NotChecked=0, Total=14042 [2022-12-14 14:41:17,137 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 335 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 2362 mSolverCounterSat, 255 mSolverCounterUnsat, 245 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2362 IncrementalHoareTripleChecker+Invalid, 245 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:41:17,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 637 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2362 Invalid, 245 Unknown, 0 Unchecked, 63.5s Time] [2022-12-14 14:41:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-12-14 14:41:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 136. [2022-12-14 14:41:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 80 states have internal predecessors, (86), 36 states have call successors, (36), 22 states have call predecessors, (36), 22 states have return successors, (38), 33 states have call predecessors, (38), 35 states have call successors, (38) [2022-12-14 14:41:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2022-12-14 14:41:17,214 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 70 [2022-12-14 14:41:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:41:17,214 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2022-12-14 14:41:17,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 22 states have call successors, (38), 13 states have call predecessors, (38), 14 states have return successors, (34), 19 states have call predecessors, (34), 20 states have call successors, (34) [2022-12-14 14:41:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2022-12-14 14:41:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 14:41:17,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:41:17,215 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:41:17,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 14:41:17,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:41:17,416 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:41:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:41:17,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2122149373, now seen corresponding path program 1 times [2022-12-14 14:41:17,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:41:17,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819250584] [2022-12-14 14:41:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:41:17,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:41:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:41:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 14:41:25,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:41:25,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819250584] [2022-12-14 14:41:25,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819250584] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:41:25,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893985606] [2022-12-14 14:41:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:41:25,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:41:25,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:41:25,822 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:41:25,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704b1b94-90ce-4789-8908-7753a8723dad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 14:41:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:41:26,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 158 conjunts are in the unsatisfiable core [2022-12-14 14:41:26,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:41:26,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 14:41:29,103 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 14:41:29,289 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:41:29,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 14:41:29,330 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 14:41:29,445 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 14:41:29,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 14:41:29,562 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 14:41:29,583 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 14:41:30,535 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-12-14 14:41:30,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 122 [2022-12-14 14:41:30,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:30,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 90 [2022-12-14 14:41:30,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:30,611 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 25 [2022-12-14 14:41:30,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 14:41:30,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:41:30,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20