./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 b5237d83 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_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/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_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba --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-b5237d8 [2022-11-22 01:49:52,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:49:52,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:49:52,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:49:52,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:49:52,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:49:52,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:49:52,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:49:52,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:49:52,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:49:52,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:49:52,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:49:52,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:49:52,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:49:52,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:49:52,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:49:52,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:49:52,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:49:52,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:49:52,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:49:52,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:49:53,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:49:53,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:49:53,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:49:53,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:49:53,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:49:53,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:49:53,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:49:53,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:49:53,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:49:53,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:49:53,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:49:53,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:49:53,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:49:53,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:49:53,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:49:53,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:49:53,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:49:53,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:49:53,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:49:53,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:49:53,021 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 01:49:53,066 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:49:53,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:49:53,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:49:53,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:49:53,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:49:53,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:49:53,068 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:49:53,069 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:49:53,069 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:49:53,069 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:49:53,070 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:49:53,070 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:49:53,071 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:49:53,071 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:49:53,071 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:49:53,071 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:49:53,072 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:49:53,072 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:49:53,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:49:53,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:49:53,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:49:53,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:49:53,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:49:53,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:49:53,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:49:53,074 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:49:53,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:49:53,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:49:53,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:49:53,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:49:53,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:49:53,076 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:49:53,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:49:53,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:49:53,077 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:49:53,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:49:53,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:49:53,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:49:53,078 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_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2022-11-22 01:49:53,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:49:53,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:49:53,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:49:53,390 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:49:53,391 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:49:53,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-11-22 01:49:56,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:49:57,555 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:49:57,556 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-11-22 01:49:57,601 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/data/d2d80eec5/78bb79534e6c4d058f3e2e3155e92cd7/FLAG623d715b7 [2022-11-22 01:49:57,624 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/data/d2d80eec5/78bb79534e6c4d058f3e2e3155e92cd7 [2022-11-22 01:49:57,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:49:57,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:49:57,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:49:57,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:49:57,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:49:57,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:49:57" (1/1) ... [2022-11-22 01:49:57,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@583f3a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:57, skipping insertion in model container [2022-11-22 01:49:57,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:49:57" (1/1) ... [2022-11-22 01:49:57,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:49:57,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:49:58,120 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_7c4723f1-c33d-4402-babd-4116f0d843fd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-22 01:49:58,130 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_7c4723f1-c33d-4402-babd-4116f0d843fd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-22 01:49:59,203 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,204 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,205 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,206 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,208 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,225 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,226 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,229 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,230 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,233 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,235 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,236 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,237 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:49:59,812 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 01:49:59,813 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 01:49:59,815 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 01:49:59,817 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 01:49:59,819 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 01:49:59,820 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 01:49:59,820 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 01:49:59,821 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 01:49:59,822 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 01:49:59,823 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 01:50:00,044 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 01:50:00,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:50:00,095 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:50:00,115 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_7c4723f1-c33d-4402-babd-4116f0d843fd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-22 01:50:00,116 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_7c4723f1-c33d-4402-babd-4116f0d843fd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-22 01:50:00,225 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,236 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,236 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,237 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,238 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,247 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,252 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,254 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,260 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,261 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,262 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,263 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,263 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:50:00,358 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 01:50:00,359 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 01:50:00,362 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 01:50:00,363 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 01:50:00,371 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 01:50:00,372 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 01:50:00,373 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 01:50:00,375 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 01:50:00,427 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 01:50:00,427 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 01:50:00,511 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 01:50:00,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:50:00,843 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:50:00,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00 WrapperNode [2022-11-22 01:50:00,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:50:00,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:50:00,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:50:00,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:50:00,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00" (1/1) ... [2022-11-22 01:50:00,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00" (1/1) ... [2022-11-22 01:50:01,059 INFO L138 Inliner]: procedures = 679, calls = 1044, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 133 [2022-11-22 01:50:01,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:50:01,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:50:01,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:50:01,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:50:01,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00" (1/1) ... [2022-11-22 01:50:01,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00" (1/1) ... [2022-11-22 01:50:01,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00" (1/1) ... [2022-11-22 01:50:01,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00" (1/1) ... [2022-11-22 01:50:01,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00" (1/1) ... [2022-11-22 01:50:01,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00" (1/1) ... [2022-11-22 01:50:01,157 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00" (1/1) ... [2022-11-22 01:50:01,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00" (1/1) ... [2022-11-22 01:50:01,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:50:01,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:50:01,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:50:01,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:50:01,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00" (1/1) ... [2022-11-22 01:50:01,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:50:01,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:01,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:50:01,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:50:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:50:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 01:50:01,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 01:50:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-22 01:50:01,272 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-22 01:50:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:50:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-22 01:50:01,274 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-22 01:50:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:50:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 01:50:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_front [2022-11-22 01:50:01,274 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_front [2022-11-22 01:50:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:50:01,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:50:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-22 01:50:01,276 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-22 01:50:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 01:50:01,277 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 01:50:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:50:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 01:50:01,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 01:50:01,278 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-22 01:50:01,278 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-22 01:50:01,279 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-22 01:50:01,279 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-22 01:50:01,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:50:01,640 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:50:01,642 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:50:02,139 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:50:02,320 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:50:02,321 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 01:50:02,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:50:02 BoogieIcfgContainer [2022-11-22 01:50:02,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:50:02,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:50:02,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:50:02,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:50:02,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:49:57" (1/3) ... [2022-11-22 01:50:02,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571fffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:50:02, skipping insertion in model container [2022-11-22 01:50:02,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:00" (2/3) ... [2022-11-22 01:50:02,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571fffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:50:02, skipping insertion in model container [2022-11-22 01:50:02,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:50:02" (3/3) ... [2022-11-22 01:50:02,334 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2022-11-22 01:50:02,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:50:02,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:50:02,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:50:02,449 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;@4ce36a2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:50:02,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:50:02,455 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) [2022-11-22 01:50:02,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 01:50:02,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:02,470 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] [2022-11-22 01:50:02,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:02,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1216931554, now seen corresponding path program 1 times [2022-11-22 01:50:02,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:02,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70947486] [2022-11-22 01:50:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:02,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 01:50:03,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70947486] [2022-11-22 01:50:03,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70947486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:50:03,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312283282] [2022-11-22 01:50:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:03,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:03,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:03,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:50:03,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:50:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:03,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-22 01:50:03,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:03,999 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 [2022-11-22 01:50:04,019 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 [2022-11-22 01:50:04,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:04,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:04,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:04,121 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 [2022-11-22 01:50:04,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:04,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:04,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:04,151 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 [2022-11-22 01:50:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 01:50:07,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:50:07,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312283282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:07,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:50:07,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2022-11-22 01:50:07,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037865773] [2022-11-22 01:50:07,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:07,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:50:07,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:07,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:50:07,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:50:07,837 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) [2022-11-22 01:50:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:09,264 INFO L93 Difference]: Finished difference Result 188 states and 265 transitions. [2022-11-22 01:50:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:50:09,266 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 [2022-11-22 01:50:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:09,277 INFO L225 Difference]: With dead ends: 188 [2022-11-22 01:50:09,278 INFO L226 Difference]: Without dead ends: 127 [2022-11-22 01:50:09,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:50:09,286 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 80 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:09,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 347 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:50:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-22 01:50:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-11-22 01:50:09,364 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) [2022-11-22 01:50:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2022-11-22 01:50:09,370 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 52 [2022-11-22 01:50:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:09,371 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2022-11-22 01:50:09,371 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) [2022-11-22 01:50:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2022-11-22 01:50:09,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 01:50:09,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:09,375 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] [2022-11-22 01:50:09,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:09,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:09,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:09,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1311656922, now seen corresponding path program 1 times [2022-11-22 01:50:09,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:09,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417283441] [2022-11-22 01:50:09,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:09,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 01:50:09,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417283441] [2022-11-22 01:50:09,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417283441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:50:09,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203059463] [2022-11-22 01:50:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:09,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:09,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:09,993 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:50:09,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:50:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:10,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-22 01:50:10,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:10,267 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 [2022-11-22 01:50:10,484 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 [2022-11-22 01:50:10,521 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 [2022-11-22 01:50:10,608 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:50:10,609 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 [2022-11-22 01:50:10,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:10,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:10,623 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 [2022-11-22 01:50:10,631 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 [2022-11-22 01:50:10,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:10,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:10,654 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 [2022-11-22 01:50:10,661 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 [2022-11-22 01:50:10,810 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-22 01:50:10,811 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 [2022-11-22 01:50:10,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:10,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:10,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:10,828 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 [2022-11-22 01:50:10,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:10,848 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 [2022-11-22 01:50:10,869 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 [2022-11-22 01:50:10,889 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 [2022-11-22 01:50:10,894 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 [2022-11-22 01:50:10,915 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 [2022-11-22 01:50:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 01:50:14,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:22,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:22,993 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 [2022-11-22 01:50:23,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:23,012 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 [2022-11-22 01:50:23,021 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 [2022-11-22 01:50:23,033 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 [2022-11-22 01:50:23,506 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 [2022-11-22 01:50:23,519 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 [2022-11-22 01:50:23,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:23,562 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 [2022-11-22 01:50:23,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:23,645 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 [2022-11-22 01:50:23,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:23,658 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 [2022-11-22 01:50:23,668 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 [2022-11-22 01:50:23,680 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 [2022-11-22 01:50:23,720 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 [2022-11-22 01:50:23,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:23,745 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 [2022-11-22 01:50:23,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:23,828 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 [2022-11-22 01:50:23,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:50:23,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:23,859 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 [2022-11-22 01:50:23,874 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 [2022-11-22 01:50:23,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:23,901 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 [2022-11-22 01:50:23,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:23,928 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 [2022-11-22 01:50:23,947 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 [2022-11-22 01:50:23,967 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 [2022-11-22 01:50:24,057 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 [2022-11-22 01:50:24,079 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,079 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 [2022-11-22 01:50:24,129 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 [2022-11-22 01:50:24,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,157 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 [2022-11-22 01:50:24,210 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,210 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 [2022-11-22 01:50:24,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:50:24,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,226 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 [2022-11-22 01:50:24,235 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 [2022-11-22 01:50:24,261 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 [2022-11-22 01:50:24,280 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,281 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 [2022-11-22 01:50:24,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,351 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 [2022-11-22 01:50:24,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:50:24,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,389 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 [2022-11-22 01:50:24,404 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 [2022-11-22 01:50:24,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,432 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 [2022-11-22 01:50:24,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,456 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 [2022-11-22 01:50:24,474 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 [2022-11-22 01:50:24,491 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 [2022-11-22 01:50:24,552 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 [2022-11-22 01:50:24,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,572 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 [2022-11-22 01:50:24,644 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 [2022-11-22 01:50:24,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,670 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 [2022-11-22 01:50:24,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,749 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 [2022-11-22 01:50:24,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:50:24,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,766 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 [2022-11-22 01:50:24,776 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 [2022-11-22 01:50:24,820 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 [2022-11-22 01:50:24,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:50:24,837 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 [2022-11-22 01:50:25,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203059463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:50:25,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1873790075] [2022-11-22 01:50:25,302 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 01:50:25,302 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:50:25,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:50:25,315 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:50:25,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:50:25,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,445 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 01:50:25,450 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 [2022-11-22 01:50:25,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,478 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 [2022-11-22 01:50:25,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,871 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 [2022-11-22 01:50:25,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,908 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 [2022-11-22 01:50:25,937 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 [2022-11-22 01:50:25,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:25,969 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 [2022-11-22 01:50:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,061 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 [2022-11-22 01:50:26,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:50:26,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:50:26,129 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 01:50:26,132 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 [2022-11-22 01:50:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,171 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 [2022-11-22 01:50:26,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:50:26,233 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 01:50:26,234 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 [2022-11-22 01:50:26,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,347 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:50:26,348 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 [2022-11-22 01:50:26,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,383 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 [2022-11-22 01:50:26,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,497 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 [2022-11-22 01:50:26,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,531 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 [2022-11-22 01:50:26,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:50:26,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,553 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 [2022-11-22 01:50:26,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,580 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 [2022-11-22 01:50:26,600 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 [2022-11-22 01:50:26,613 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 [2022-11-22 01:50:26,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,683 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 [2022-11-22 01:50:26,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:50:26,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,707 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 [2022-11-22 01:50:26,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,734 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 [2022-11-22 01:50:26,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,755 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 [2022-11-22 01:50:26,770 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 [2022-11-22 01:50:26,783 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 [2022-11-22 01:50:26,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,826 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 [2022-11-22 01:50:26,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,848 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 [2022-11-22 01:50:26,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,871 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 [2022-11-22 01:50:26,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:26,896 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 [2022-11-22 01:50:27,734 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-22 01:50:28,090 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 44 for LOIs [2022-11-22 01:50:28,170 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-22 01:50:28,421 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 30 for LOIs [2022-11-22 01:50:28,426 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 01:50:28,448 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:50:34,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1873790075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:34,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:50:34,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [5, 11] total 35 [2022-11-22 01:50:34,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795517199] [2022-11-22 01:50:34,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:34,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:50:34,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:34,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:50:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1650, Unknown=1, NotChecked=0, Total=1806 [2022-11-22 01:50:34,683 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) [2022-11-22 01:50:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:38,253 INFO L93 Difference]: Finished difference Result 182 states and 240 transitions. [2022-11-22 01:50:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 01:50:38,254 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 [2022-11-22 01:50:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:38,257 INFO L225 Difference]: With dead ends: 182 [2022-11-22 01:50:38,258 INFO L226 Difference]: Without dead ends: 129 [2022-11-22 01:50:38,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 98 SyntacticMatches, 17 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=179, Invalid=1890, Unknown=1, NotChecked=0, Total=2070 [2022-11-22 01:50:38,260 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 60 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:38,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 327 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-22 01:50:38,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-22 01:50:38,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-22 01:50:38,314 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) [2022-11-22 01:50:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2022-11-22 01:50:38,316 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 53 [2022-11-22 01:50:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:38,317 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2022-11-22 01:50:38,318 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) [2022-11-22 01:50:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2022-11-22 01:50:38,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 01:50:38,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:38,320 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] [2022-11-22 01:50:38,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:38,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-22 01:50:38,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:38,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1499262494, now seen corresponding path program 1 times [2022-11-22 01:50:38,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:38,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74084486] [2022-11-22 01:50:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:38,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:50:38,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:38,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74084486] [2022-11-22 01:50:38,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74084486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:50:38,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214661959] [2022-11-22 01:50:38,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:38,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:38,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:38,867 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:50:38,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:50:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:39,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:50:39,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 01:50:39,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:50:39,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214661959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:39,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:50:39,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-22 01:50:39,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871357650] [2022-11-22 01:50:39,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:39,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:50:39,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:39,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:50:39,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:50:39,238 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) [2022-11-22 01:50:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:39,576 INFO L93 Difference]: Finished difference Result 241 states and 319 transitions. [2022-11-22 01:50:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:50:39,577 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 [2022-11-22 01:50:39,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:39,579 INFO L225 Difference]: With dead ends: 241 [2022-11-22 01:50:39,580 INFO L226 Difference]: Without dead ends: 129 [2022-11-22 01:50:39,581 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 [2022-11-22 01:50:39,582 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 44 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:39,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 373 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:50:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-22 01:50:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-22 01:50:39,650 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) [2022-11-22 01:50:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 168 transitions. [2022-11-22 01:50:39,652 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 168 transitions. Word has length 55 [2022-11-22 01:50:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:39,653 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 168 transitions. [2022-11-22 01:50:39,653 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) [2022-11-22 01:50:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 168 transitions. [2022-11-22 01:50:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-22 01:50:39,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:39,656 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] [2022-11-22 01:50:39,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:39,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:39,864 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:39,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:39,864 INFO L85 PathProgramCache]: Analyzing trace with hash -342041622, now seen corresponding path program 1 times [2022-11-22 01:50:39,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:39,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057267992] [2022-11-22 01:50:39,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:39,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:50:40,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057267992] [2022-11-22 01:50:40,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057267992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:50:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686287839] [2022-11-22 01:50:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:40,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:40,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:40,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:50:40,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:50:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:40,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:50:40,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 01:50:40,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:50:40,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686287839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:40,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:50:40,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-11-22 01:50:40,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303942085] [2022-11-22 01:50:40,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:40,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:50:40,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:50:40,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:50:40,578 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) [2022-11-22 01:50:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:40,966 INFO L93 Difference]: Finished difference Result 259 states and 345 transitions. [2022-11-22 01:50:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:50:40,967 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 [2022-11-22 01:50:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:40,970 INFO L225 Difference]: With dead ends: 259 [2022-11-22 01:50:40,970 INFO L226 Difference]: Without dead ends: 145 [2022-11-22 01:50:40,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:50:40,972 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 73 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:40,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 417 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:50:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-22 01:50:41,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2022-11-22 01:50:41,041 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) [2022-11-22 01:50:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 170 transitions. [2022-11-22 01:50:41,045 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 170 transitions. Word has length 57 [2022-11-22 01:50:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:41,045 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 170 transitions. [2022-11-22 01:50:41,046 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) [2022-11-22 01:50:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 170 transitions. [2022-11-22 01:50:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 01:50:41,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:41,048 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] [2022-11-22 01:50:41,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:41,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:41,256 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:41,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2018481229, now seen corresponding path program 1 times [2022-11-22 01:50:41,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:41,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418004071] [2022-11-22 01:50:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:41,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:50:41,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:41,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418004071] [2022-11-22 01:50:41,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418004071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:50:41,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171915466] [2022-11-22 01:50:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:41,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:41,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:41,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:50:41,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:50:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:41,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:50:41,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 01:50:42,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:50:42,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171915466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:42,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:50:42,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-11-22 01:50:42,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073443622] [2022-11-22 01:50:42,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:42,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:50:42,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:42,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:50:42,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:50:42,029 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) [2022-11-22 01:50:42,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:42,161 INFO L93 Difference]: Finished difference Result 251 states and 337 transitions. [2022-11-22 01:50:42,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:50:42,162 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 [2022-11-22 01:50:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:42,166 INFO L225 Difference]: With dead ends: 251 [2022-11-22 01:50:42,166 INFO L226 Difference]: Without dead ends: 143 [2022-11-22 01:50:42,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:50:42,169 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:42,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 147 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:50:42,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-22 01:50:42,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2022-11-22 01:50:42,261 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) [2022-11-22 01:50:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 172 transitions. [2022-11-22 01:50:42,265 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 172 transitions. Word has length 58 [2022-11-22 01:50:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:42,266 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 172 transitions. [2022-11-22 01:50:42,267 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) [2022-11-22 01:50:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 172 transitions. [2022-11-22 01:50:42,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-22 01:50:42,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:42,270 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] [2022-11-22 01:50:42,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:42,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:42,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:42,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:42,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1650262769, now seen corresponding path program 1 times [2022-11-22 01:50:42,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:42,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187883957] [2022-11-22 01:50:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:42,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 01:50:42,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:42,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187883957] [2022-11-22 01:50:42,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187883957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:50:42,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461320653] [2022-11-22 01:50:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:42,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:42,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:42,855 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:50:42,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:50:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:43,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-22 01:50:43,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:43,146 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 [2022-11-22 01:50:43,377 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-22 01:50:43,395 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:50:43,395 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 [2022-11-22 01:50:43,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:50:43,418 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:50:43,419 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 [2022-11-22 01:50:43,510 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-22 01:50:43,510 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 [2022-11-22 01:50:43,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:50:43,517 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 [2022-11-22 01:50:43,525 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 [2022-11-22 01:50:43,534 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 [2022-11-22 01:50:43,546 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 [2022-11-22 01:50:43,550 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 [2022-11-22 01:50:56,731 WARN L233 SmtUtils]: Spent 10.48s 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) [2022-11-22 01:51:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:51:00,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:51:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:51:05,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461320653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:51:05,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225618341] [2022-11-22 01:51:05,429 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-11-22 01:51:05,429 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:51:05,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:51:05,430 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:51:05,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:51:05,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,504 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:51:05,504 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 [2022-11-22 01:51:05,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,583 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 01:51:05,584 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 [2022-11-22 01:51:05,867 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 [2022-11-22 01:51:05,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,889 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 [2022-11-22 01:51:05,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,922 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 [2022-11-22 01:51:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:05,959 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 [2022-11-22 01:51:06,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,032 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 [2022-11-22 01:51:06,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,121 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-22 01:51:06,121 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 [2022-11-22 01:51:06,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,230 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:51:06,230 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 [2022-11-22 01:51:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,270 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 [2022-11-22 01:51:06,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,315 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 [2022-11-22 01:51:06,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:06,354 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 [2022-11-22 01:51:06,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:06,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:06,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:06,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:06,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:06,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:07,062 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-22 01:51:07,062 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 [2022-11-22 01:51:07,488 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-22 01:51:07,489 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 [2022-11-22 01:51:07,947 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-22 01:51:07,948 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 [2022-11-22 01:51:08,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:08,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:08,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:08,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:08,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:08,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:08,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:08,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:08,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:08,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:08,358 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-22 01:51:08,359 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 [2022-11-22 01:51:08,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:08,410 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 [2022-11-22 01:51:08,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:08,482 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-22 01:51:08,482 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 [2022-11-22 01:51:08,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:08,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:08,526 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 [2022-11-22 01:51:13,455 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 [2022-11-22 01:51:13,468 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 [2022-11-22 01:51:13,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:13,489 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 [2022-11-22 01:51:13,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:13,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:13,509 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 [2022-11-22 01:51:13,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:13,530 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 [2022-11-22 01:51:13,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:13,554 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 [2022-11-22 01:51:13,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:13,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:13,588 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 [2022-11-22 01:51:13,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:13,609 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 [2022-11-22 01:51:13,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:13,638 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 [2022-11-22 01:51:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:13,660 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 [2022-11-22 01:51:13,995 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 79 for LOIs [2022-11-22 01:51:14,490 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 49 for LOIs [2022-11-22 01:51:14,597 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 79 for LOIs [2022-11-22 01:51:15,113 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-22 01:51:15,120 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 01:51:15,143 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-22 01:51:15,220 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:51:24,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1225618341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:24,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:51:24,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [6, 16, 7] total 53 [2022-11-22 01:51:24,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671721174] [2022-11-22 01:51:24,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:24,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-22 01:51:24,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:24,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-22 01:51:24,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2546, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 01:51:24,107 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) [2022-11-22 01:51:31,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:31,621 INFO L93 Difference]: Finished difference Result 257 states and 333 transitions. [2022-11-22 01:51:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-22 01:51:31,622 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 [2022-11-22 01:51:31,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:31,624 INFO L225 Difference]: With dead ends: 257 [2022-11-22 01:51:31,624 INFO L226 Difference]: Without dead ends: 147 [2022-11-22 01:51:31,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 119 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=270, Invalid=3152, Unknown=0, NotChecked=0, Total=3422 [2022-11-22 01:51:31,627 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 102 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:31,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 319 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-22 01:51:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-22 01:51:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2022-11-22 01:51:31,692 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) [2022-11-22 01:51:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 187 transitions. [2022-11-22 01:51:31,694 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 187 transitions. Word has length 61 [2022-11-22 01:51:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:31,694 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 187 transitions. [2022-11-22 01:51:31,695 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) [2022-11-22 01:51:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 187 transitions. [2022-11-22 01:51:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 01:51:31,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:31,697 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] [2022-11-22 01:51:31,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:51:31,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 01:51:31,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:31,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:31,907 INFO L85 PathProgramCache]: Analyzing trace with hash 575582167, now seen corresponding path program 1 times [2022-11-22 01:51:31,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:31,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5516440] [2022-11-22 01:51:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:31,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:51:33,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:33,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5516440] [2022-11-22 01:51:33,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5516440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:51:33,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548087609] [2022-11-22 01:51:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:33,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:51:33,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:51:33,225 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:51:33,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:51:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-22 01:51:33,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:33,559 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 [2022-11-22 01:51:33,795 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 [2022-11-22 01:51:33,814 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:51:33,814 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 [2022-11-22 01:51:33,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:51:33,842 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:51:33,842 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 [2022-11-22 01:51:33,932 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-22 01:51:33,932 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 [2022-11-22 01:51:33,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:33,941 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 [2022-11-22 01:51:33,950 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 [2022-11-22 01:51:34,064 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 [2022-11-22 01:51:34,277 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 [2022-11-22 01:51:34,800 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 [2022-11-22 01:51:36,120 INFO L321 Elim1Store]: treesize reduction 224, result has 0.4 percent of original size [2022-11-22 01:51:36,121 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 [2022-11-22 01:51:36,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-22 01:51:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 6 not checked. [2022-11-22 01:51:36,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:51:36,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:51:36,923 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 [2022-11-22 01:51:36,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:51:36,946 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 [2022-11-22 01:51:36,958 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 [2022-11-22 01:51:36,972 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 [2022-11-22 01:51:37,112 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 [2022-11-22 01:51:37,131 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 [2022-11-22 01:51:37,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:51:37,148 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 [2022-11-22 01:51:37,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548087609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:51:37,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030150738] [2022-11-22 01:51:37,623 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-22 01:51:37,624 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:51:37,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:51:37,624 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:51:37,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:51:37,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:37,692 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 01:51:37,692 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 [2022-11-22 01:51:37,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:37,719 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 [2022-11-22 01:51:37,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:37,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:37,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:37,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:37,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:37,990 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 [2022-11-22 01:51:38,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,018 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 [2022-11-22 01:51:38,049 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 [2022-11-22 01:51:38,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,079 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 [2022-11-22 01:51:38,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,162 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 [2022-11-22 01:51:38,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,235 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-22 01:51:38,235 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 [2022-11-22 01:51:38,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,337 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:51:38,337 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 [2022-11-22 01:51:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,373 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 [2022-11-22 01:51:38,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,419 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 [2022-11-22 01:51:38,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:38,458 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 [2022-11-22 01:51:38,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:38,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:38,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:38,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:38,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:38,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:39,179 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-22 01:51:39,180 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 [2022-11-22 01:51:39,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:39,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:39,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:39,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:39,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:39,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:39,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:39,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:39,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:39,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:39,562 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-22 01:51:39,563 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 [2022-11-22 01:51:39,889 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-22 01:51:39,890 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 [2022-11-22 01:51:39,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:39,968 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-22 01:51:39,968 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 [2022-11-22 01:51:40,001 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 [2022-11-22 01:51:40,138 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-22 01:51:40,138 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 [2022-11-22 01:51:41,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:41,181 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 [2022-11-22 01:51:41,258 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 [2022-11-22 01:51:41,267 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 [2022-11-22 01:51:41,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:41,287 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 [2022-11-22 01:51:41,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:41,311 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 [2022-11-22 01:51:41,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:51:41,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:41,330 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 [2022-11-22 01:51:41,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:41,352 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 [2022-11-22 01:51:41,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:41,381 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 [2022-11-22 01:51:41,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:41,392 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 [2022-11-22 01:51:41,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:41,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:41,410 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 [2022-11-22 01:51:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:41,434 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 [2022-11-22 01:51:42,181 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-22 01:51:42,805 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 43 for LOIs [2022-11-22 01:51:42,890 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-22 01:51:43,948 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 61 for LOIs [2022-11-22 01:51:43,970 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 01:51:43,998 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 01:51:44,074 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:51:54,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2030150738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:54,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:51:54,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 18] total 54 [2022-11-22 01:51:54,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191159425] [2022-11-22 01:51:54,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:54,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-22 01:51:54,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:54,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-22 01:51:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3519, Unknown=27, NotChecked=366, Total=4160 [2022-11-22 01:51:54,668 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) [2022-11-22 01:52:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:03,418 INFO L93 Difference]: Finished difference Result 283 states and 368 transitions. [2022-11-22 01:52:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-22 01:52:03,419 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 [2022-11-22 01:52:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:03,422 INFO L225 Difference]: With dead ends: 283 [2022-11-22 01:52:03,422 INFO L226 Difference]: Without dead ends: 161 [2022-11-22 01:52:03,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 122 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=355, Invalid=4588, Unknown=39, NotChecked=420, Total=5402 [2022-11-22 01:52:03,424 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 101 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:03,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 311 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-22 01:52:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-22 01:52:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2022-11-22 01:52:03,524 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) [2022-11-22 01:52:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2022-11-22 01:52:03,526 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 63 [2022-11-22 01:52:03,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:03,527 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2022-11-22 01:52:03,527 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) [2022-11-22 01:52:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2022-11-22 01:52:03,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 01:52:03,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:03,529 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] [2022-11-22 01:52:03,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:03,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 01:52:03,738 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:52:03,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:03,738 INFO L85 PathProgramCache]: Analyzing trace with hash 658052454, now seen corresponding path program 1 times [2022-11-22 01:52:03,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:03,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035068328] [2022-11-22 01:52:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:03,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 01:52:05,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:05,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035068328] [2022-11-22 01:52:05,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035068328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:05,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137630211] [2022-11-22 01:52:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:05,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:05,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:05,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:52:05,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:52:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:05,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-22 01:52:05,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:05,943 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 [2022-11-22 01:52:06,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-22 01:52:06,157 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:52:06,158 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 [2022-11-22 01:52:06,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 01:52:06,187 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:52:06,187 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 [2022-11-22 01:52:06,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:06,254 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 [2022-11-22 01:52:06,257 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 [2022-11-22 01:52:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:52:07,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:07,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:52:07,708 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 [2022-11-22 01:52:07,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:52:07,730 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 [2022-11-22 01:52:07,741 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 [2022-11-22 01:52:07,751 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 [2022-11-22 01:52:07,859 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 [2022-11-22 01:52:07,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:52:07,883 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 [2022-11-22 01:52:07,996 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 [2022-11-22 01:52:08,013 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 [2022-11-22 01:52:08,026 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 [2022-11-22 01:52:08,034 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 [2022-11-22 01:52:08,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137630211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:08,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654362792] [2022-11-22 01:52:08,489 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-22 01:52:08,489 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:52:08,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:52:08,490 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:52:08,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:52:08,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,579 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 01:52:08,579 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 [2022-11-22 01:52:08,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,606 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 [2022-11-22 01:52:08,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,863 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 [2022-11-22 01:52:08,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,896 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 [2022-11-22 01:52:08,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:08,932 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 [2022-11-22 01:52:08,965 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 [2022-11-22 01:52:09,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,085 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:52:09,086 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 [2022-11-22 01:52:09,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,123 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 [2022-11-22 01:52:09,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,159 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 [2022-11-22 01:52:09,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,194 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 [2022-11-22 01:52:09,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,233 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 [2022-11-22 01:52:09,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:09,270 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 [2022-11-22 01:52:09,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:09,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:09,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:09,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:09,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:09,943 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-22 01:52:09,944 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 [2022-11-22 01:52:10,484 INFO L321 Elim1Store]: treesize reduction 192, result has 23.5 percent of original size [2022-11-22 01:52:10,484 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 [2022-11-22 01:52:10,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:10,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:10,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:10,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:10,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:10,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:10,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:10,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:10,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:10,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:10,912 INFO L321 Elim1Store]: treesize reduction 233, result has 25.6 percent of original size [2022-11-22 01:52:10,913 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 [2022-11-22 01:52:10,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:10,962 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 [2022-11-22 01:52:11,103 INFO L321 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2022-11-22 01:52:11,104 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 [2022-11-22 01:52:11,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:11,180 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-22 01:52:11,181 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 [2022-11-22 01:52:11,216 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 [2022-11-22 01:52:42,571 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 [2022-11-22 01:52:42,582 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 [2022-11-22 01:52:42,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:42,608 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 [2022-11-22 01:52:42,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:42,639 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 [2022-11-22 01:52:42,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:52:42,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:42,660 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 [2022-11-22 01:52:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:42,685 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 [2022-11-22 01:52:42,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:42,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:42,721 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 [2022-11-22 01:52:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:42,741 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 [2022-11-22 01:52:42,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:42,766 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 [2022-11-22 01:52:42,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:42,790 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 [2022-11-22 01:52:43,125 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 79 for LOIs [2022-11-22 01:52:44,165 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 103 for LOIs [2022-11-22 01:52:44,441 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 84 for LOIs [2022-11-22 01:52:44,506 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 79 for LOIs [2022-11-22 01:52:45,503 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-11-22 01:52:45,506 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 01:52:45,525 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 01:52:45,599 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:53:03,540 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 [2022-11-22 01:53:03,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:53:03,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:53:03,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-11-22 01:53:03,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313864995] [2022-11-22 01:53:03,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:03,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 01:53:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 01:53:03,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4558, Unknown=8, NotChecked=0, Total=4830 [2022-11-22 01:53:03,543 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) [2022-11-22 01:53:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:06,954 INFO L93 Difference]: Finished difference Result 250 states and 329 transitions. [2022-11-22 01:53:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:53:06,954 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 [2022-11-22 01:53:06,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:06,956 INFO L225 Difference]: With dead ends: 250 [2022-11-22 01:53:06,956 INFO L226 Difference]: Without dead ends: 183 [2022-11-22 01:53:06,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 128 SyntacticMatches, 12 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=435, Invalid=6529, Unknown=8, NotChecked=0, Total=6972 [2022-11-22 01:53:06,959 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 262 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:06,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1321 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-22 01:53:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-22 01:53:07,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 149. [2022-11-22 01:53:07,022 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) [2022-11-22 01:53:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 192 transitions. [2022-11-22 01:53:07,024 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 192 transitions. Word has length 64 [2022-11-22 01:53:07,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:07,024 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 192 transitions. [2022-11-22 01:53:07,025 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) [2022-11-22 01:53:07,025 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 192 transitions. [2022-11-22 01:53:07,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 01:53:07,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:07,025 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] [2022-11-22 01:53:07,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:07,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:07,226 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:53:07,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:07,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1103162756, now seen corresponding path program 1 times [2022-11-22 01:53:07,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:07,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718771242] [2022-11-22 01:53:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:07,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 01:53:07,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:07,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718771242] [2022-11-22 01:53:07,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718771242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:07,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340103053] [2022-11-22 01:53:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:07,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:07,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:07,487 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:07,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:53:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:07,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 01:53:07,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:53:07,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:53:07,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340103053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:53:07,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:53:07,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 13 [2022-11-22 01:53:07,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549717395] [2022-11-22 01:53:07,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:53:07,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:53:07,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:07,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:53:07,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:53:07,970 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) [2022-11-22 01:53:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:08,449 INFO L93 Difference]: Finished difference Result 289 states and 374 transitions. [2022-11-22 01:53:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:53:08,450 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 [2022-11-22 01:53:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:08,452 INFO L225 Difference]: With dead ends: 289 [2022-11-22 01:53:08,452 INFO L226 Difference]: Without dead ends: 163 [2022-11-22 01:53:08,453 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 [2022-11-22 01:53:08,456 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 17 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:08,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 508 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:53:08,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-22 01:53:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 148. [2022-11-22 01:53:08,580 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) [2022-11-22 01:53:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 190 transitions. [2022-11-22 01:53:08,582 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 190 transitions. Word has length 67 [2022-11-22 01:53:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:08,585 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 190 transitions. [2022-11-22 01:53:08,585 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) [2022-11-22 01:53:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 190 transitions. [2022-11-22 01:53:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 01:53:08,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:08,595 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] [2022-11-22 01:53:08,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:08,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:08,822 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:53:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash -978232361, now seen corresponding path program 1 times [2022-11-22 01:53:08,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:08,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582758940] [2022-11-22 01:53:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:08,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-22 01:53:10,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:10,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582758940] [2022-11-22 01:53:10,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582758940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:10,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607456761] [2022-11-22 01:53:10,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:10,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:10,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:10,656 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:10,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:53:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:10,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-22 01:53:11,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:11,101 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:53:11,101 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 [2022-11-22 01:53:11,123 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:53:11,124 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 [2022-11-22 01:53:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:53:12,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:22,908 WARN L233 SmtUtils]: Spent 1.02m 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) [2022-11-22 01:54:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 01:54:24,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607456761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:24,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821635417] [2022-11-22 01:54:24,975 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-22 01:54:24,975 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:54:24,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:54:24,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:54:24,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:54:25,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,096 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 01:54:25,097 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 [2022-11-22 01:54:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,119 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 [2022-11-22 01:54:25,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,353 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 [2022-11-22 01:54:25,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,383 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 [2022-11-22 01:54:25,409 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 [2022-11-22 01:54:25,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,434 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 [2022-11-22 01:54:25,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,488 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 [2022-11-22 01:54:25,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,542 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 [2022-11-22 01:54:25,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,581 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 [2022-11-22 01:54:25,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:25,633 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 [2022-11-22 01:54:26,112 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 125 for LOIs [2022-11-22 01:54:26,261 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-22 01:54:26,262 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 01:54:26,279 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:54:34,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [821635417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:34,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:54:34,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15, 20, 23] total 63 [2022-11-22 01:54:34,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138451408] [2022-11-22 01:54:34,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:34,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:54:34,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:54:34,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:54:34,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3635, Unknown=1, NotChecked=0, Total=3906 [2022-11-22 01:54:34,686 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) [2022-11-22 01:54:36,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:36,446 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2022-11-22 01:54:36,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:54:36,446 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 [2022-11-22 01:54:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:36,447 INFO L225 Difference]: With dead ends: 157 [2022-11-22 01:54:36,448 INFO L226 Difference]: Without dead ends: 83 [2022-11-22 01:54:36,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 158 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 76.1s TimeCoverageRelationStatistics Valid=277, Invalid=3754, Unknown=1, NotChecked=0, Total=4032 [2022-11-22 01:54:36,450 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 86 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:36,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 169 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 01:54:36,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-22 01:54:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-11-22 01:54:36,486 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) [2022-11-22 01:54:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-11-22 01:54:36,487 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 71 [2022-11-22 01:54:36,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:36,488 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-11-22 01:54:36,488 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) [2022-11-22 01:54:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-11-22 01:54:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 01:54:36,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:36,489 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] [2022-11-22 01:54:36,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:36,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:54:36,691 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:36,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:36,691 INFO L85 PathProgramCache]: Analyzing trace with hash -86348583, now seen corresponding path program 2 times [2022-11-22 01:54:36,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:36,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163227449] [2022-11-22 01:54:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:36,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 01:54:42,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:54:42,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163227449] [2022-11-22 01:54:42,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163227449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:54:42,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178708644] [2022-11-22 01:54:42,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:54:42,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:42,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:42,013 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:42,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:54:42,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 01:54:42,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:54:42,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-22 01:54:42,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:42,583 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 01:54:42,584 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 [2022-11-22 01:54:43,315 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 [2022-11-22 01:54:43,331 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 [2022-11-22 01:54:43,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:43,482 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 [2022-11-22 01:54:43,511 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:54:43,511 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 [2022-11-22 01:54:43,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:43,525 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 [2022-11-22 01:54:43,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:43,542 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 [2022-11-22 01:54:43,569 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:54:43,570 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 [2022-11-22 01:54:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:43,593 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 [2022-11-22 01:54:43,673 INFO L321 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2022-11-22 01:54:43,673 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 [2022-11-22 01:54:43,952 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-22 01:54:43,952 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 [2022-11-22 01:54:43,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:43,964 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 [2022-11-22 01:54:43,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:43,980 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 [2022-11-22 01:54:43,993 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 [2022-11-22 01:54:44,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:44,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:44,063 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 [2022-11-22 01:55:38,190 WARN L233 SmtUtils]: Spent 35.19s 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) [2022-11-22 01:56:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 13 refuted. 2 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:56:32,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 01:56:38,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178708644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:38,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1215354654] [2022-11-22 01:56:38,392 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-22 01:56:38,392 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:56:38,393 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:56:38,393 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:56:38,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:56:38,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,474 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 01:56:38,474 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 [2022-11-22 01:56:38,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,491 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 [2022-11-22 01:56:38,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,687 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 [2022-11-22 01:56:38,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,717 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 [2022-11-22 01:56:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,752 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 [2022-11-22 01:56:38,782 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 [2022-11-22 01:56:38,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,947 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:56:38,948 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 [2022-11-22 01:56:38,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,976 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 [2022-11-22 01:56:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,994 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 [2022-11-22 01:56:39,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,050 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 [2022-11-22 01:56:39,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,103 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 [2022-11-22 01:56:39,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:39,141 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 [2022-11-22 01:56:39,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:39,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:39,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:39,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:39,860 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-22 01:56:39,861 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 [2022-11-22 01:56:39,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:39,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:39,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:39,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:39,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:39,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:40,299 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-22 01:56:40,299 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 [2022-11-22 01:56:40,545 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-22 01:56:40,546 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 [2022-11-22 01:56:40,846 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-22 01:56:40,847 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 [2022-11-22 01:56:40,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:40,920 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-22 01:56:40,921 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 [2022-11-22 01:56:40,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:40,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:40,955 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 [2022-11-22 01:57:01,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:01,180 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 [2022-11-22 01:57:02,291 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 [2022-11-22 01:57:02,301 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 [2022-11-22 01:57:02,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:02,325 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 [2022-11-22 01:57:02,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:02,354 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 [2022-11-22 01:57:02,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:02,376 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 [2022-11-22 01:57:02,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:02,410 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 [2022-11-22 01:57:02,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:02,440 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 [2022-11-22 01:57:02,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:02,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:02,455 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 [2022-11-22 01:57:02,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:02,477 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 [2022-11-22 01:57:02,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:02,495 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 [2022-11-22 01:57:02,767 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 78 for LOIs [2022-11-22 01:57:03,580 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 101 for LOIs [2022-11-22 01:57:03,798 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 83 for LOIs [2022-11-22 01:57:03,863 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 78 for LOIs [2022-11-22 01:57:04,687 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-11-22 01:57:04,689 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 01:57:04,711 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 01:57:04,774 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:57:30,670 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$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) 16))) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-22 01:57:30,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:57:30,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:57:30,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 7] total 46 [2022-11-22 01:57:30,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406741579] [2022-11-22 01:57:30,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:57:30,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-22 01:57:30,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:30,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-22 01:57:30,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=5871, Unknown=94, NotChecked=0, Total=6320 [2022-11-22 01:57:30,674 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 46 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 22 states have call successors, (38), 13 states have call predecessors, (38), 14 states have return successors, (34), 19 states have call predecessors, (34), 20 states have call successors, (34) [2022-11-22 01:57:49,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:57:54,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:58:42,438 WARN L233 SmtUtils]: Spent 35.89s on a formula simplification that was a NOOP. DAG size: 216 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:58:51,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:58:53,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:59:03,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:59:05,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:59:07,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:59:09,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:59:11,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:59:13,673 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] [2022-11-22 01:59:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:55,067 INFO L93 Difference]: Finished difference Result 242 states and 308 transitions. [2022-11-22 01:59:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-22 01:59:55,068 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 [2022-11-22 01:59:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:55,070 INFO L225 Difference]: With dead ends: 242 [2022-11-22 01:59:55,070 INFO L226 Difference]: Without dead ends: 165 [2022-11-22 01:59:55,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 151 SyntacticMatches, 10 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5063 ImplicationChecksByTransitivity, 212.2s TimeCoverageRelationStatistics Valid=905, Invalid=13335, Unknown=280, NotChecked=0, Total=14520 [2022-11-22 01:59:55,075 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 472 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 263 mSolverCounterUnsat, 258 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 258 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:55,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 658 Invalid, 2874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 2353 Invalid, 258 Unknown, 0 Unchecked, 47.8s Time] [2022-11-22 01:59:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-22 01:59:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 136. [2022-11-22 01:59:55,166 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) [2022-11-22 01:59:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2022-11-22 01:59:55,167 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 70 [2022-11-22 01:59:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:55,169 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2022-11-22 01:59:55,169 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) [2022-11-22 01:59:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2022-11-22 01:59:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-22 01:59:55,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:55,171 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] [2022-11-22 01:59:55,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:55,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 01:59:55,379 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:55,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:55,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1576417214, now seen corresponding path program 1 times [2022-11-22 01:59:55,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:55,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295180661] [2022-11-22 01:59:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:55,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-22 02:00:00,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:00:00,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295180661] [2022-11-22 02:00:00,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295180661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:00:00,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369862113] [2022-11-22 02:00:00,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:00,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:00:00,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:00:00,043 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:00:00,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4723f1-c33d-4402-babd-4116f0d843fd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:00:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:00,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 158 conjunts are in the unsatisfiable core [2022-11-22 02:00:00,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:00,382 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 [2022-11-22 02:00:00,987 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 [2022-11-22 02:00:01,012 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:00:01,012 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 [2022-11-22 02:00:01,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 02:00:01,042 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:00:01,042 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 [2022-11-22 02:00:01,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-22 02:00:01,071 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 [2022-11-22 02:00:01,233 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-22 02:00:01,233 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 [2022-11-22 02:00:01,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:01,242 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 [2022-11-22 02:00:01,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:01,254 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 [2022-11-22 02:00:01,266 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 [2022-11-22 02:00:01,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:01,304 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 [2022-11-22 02:00:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 30 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:00:51,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:02,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369862113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:01:02,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1632487831] [2022-11-22 02:01:02,886 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-22 02:01:02,886 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:01:02,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:01:02,887 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:01:02,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:01:02,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:02,981 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 02:01:02,982 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 [2022-11-22 02:01:03,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,082 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:01:03,082 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 [2022-11-22 02:01:03,300 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 [2022-11-22 02:01:03,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,322 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 [2022-11-22 02:01:03,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,355 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 [2022-11-22 02:01:03,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,386 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 [2022-11-22 02:01:03,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:01:03,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:01:03,479 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:01:03,480 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 [2022-11-22 02:01:03,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,609 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-22 02:01:03,610 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 [2022-11-22 02:01:03,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:01:03,695 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 02:01:03,696 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 [2022-11-22 02:01:03,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,745 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 [2022-11-22 02:01:03,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,782 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 [2022-11-22 02:01:03,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:03,926 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:01:03,926 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 [2022-11-22 02:01:04,033 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 [2022-11-22 02:01:04,046 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 [2022-11-22 02:01:04,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,075 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 [2022-11-22 02:01:04,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,112 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 [2022-11-22 02:01:04,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,143 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 [2022-11-22 02:01:04,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:01:04,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,162 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 [2022-11-22 02:01:04,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:01:04,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,214 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 [2022-11-22 02:01:04,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,247 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 [2022-11-22 02:01:04,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,268 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 [2022-11-22 02:01:04,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,293 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 [2022-11-22 02:01:04,310 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 [2022-11-22 02:01:04,321 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 [2022-11-22 02:01:04,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,359 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 [2022-11-22 02:01:04,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,380 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 [2022-11-22 02:01:04,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,405 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 [2022-11-22 02:01:04,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:04,439 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 [2022-11-22 02:01:04,965 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-22 02:01:06,184 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 107 for LOIs [2022-11-22 02:01:06,456 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 89 for LOIs [2022-11-22 02:01:06,550 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-22 02:01:07,349 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-22 02:01:07,351 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-22 02:01:07,369 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 02:01:07,440 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:01:16,395 WARN L233 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 93 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:01:58,785 WARN L233 SmtUtils]: Spent 12.45s on a formula simplification. DAG size of input: 89 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:02:11,928 WARN L233 SmtUtils]: Spent 12.45s on a formula simplification. DAG size of input: 91 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:02:11,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10270#(and (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 16)) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24)) 0))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_123 Int)) (and (<= (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_123) 0)) (= v_aws_linked_list_front_~list.base_BEFORE_CALL_123 (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_123) 0))) 1 0) 0) 0 1) 1) (<= 0 v_aws_linked_list_front_~list.base_BEFORE_CALL_123) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_123) 0)) (= v_aws_linked_list_front_~list.base_BEFORE_CALL_123 (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_123) 0))) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (not (= (mod (ite (= v_aws_linked_list_front_~list.base_BEFORE_CALL_123 0) 0 1) 256) 0)) (<= 0 (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_123) 0)) (= v_aws_linked_list_front_~list.base_BEFORE_CALL_123 (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_123) 0))) 1 0) 0) 0 1)))) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:02:11,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:02:11,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:02:11,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 42] total 61 [2022-11-22 02:02:11,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816586543] [2022-11-22 02:02:11,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:02:11,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-22 02:02:11,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:02:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-22 02:02:11,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=10147, Unknown=254, NotChecked=0, Total=10920 [2022-11-22 02:02:11,934 INFO L87 Difference]: Start difference. First operand 136 states and 160 transitions. Second operand has 61 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 49 states have internal predecessors, (83), 23 states have call successors, (30), 13 states have call predecessors, (30), 18 states have return successors, (27), 20 states have call predecessors, (27), 21 states have call successors, (27) [2022-11-22 02:03:17,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:03:19,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:03:22,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:03:23,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:03:27,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:03:29,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:03:42,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:03:44,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:03:58,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:04:00,322 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]