./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:17:38,875 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:17:38,939 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 16:17:38,945 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:17:38,945 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:17:38,968 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:17:38,968 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:17:38,969 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:17:38,969 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:17:38,970 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:17:38,970 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:17:38,971 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:17:38,972 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:17:38,972 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:17:38,973 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:17:38,973 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:17:38,974 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:17:38,974 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:17:38,975 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:17:38,975 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:17:38,976 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:17:38,976 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:17:38,977 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:17:38,978 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:17:38,978 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:17:38,978 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:17:38,979 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:17:38,979 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:17:38,980 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:17:38,980 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:17:38,980 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:17:38,981 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:17:38,981 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:17:38,981 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:17:38,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:17:38,982 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:17:38,982 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:17:38,982 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:17:38,982 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:17:38,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:17:38,983 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:17:38,983 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:17:38,983 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:17:38,983 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:17:38,984 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2023-12-02 16:17:39,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:17:39,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:17:39,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:17:39,244 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:17:39,244 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:17:39,246 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2023-12-02 16:17:41,960 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:17:42,308 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:17:42,308 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2023-12-02 16:17:42,337 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/data/b49316154/244d6520b64b40cab0ca0e5b962328a0/FLAG5e7ed42f7 [2023-12-02 16:17:42,351 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/data/b49316154/244d6520b64b40cab0ca0e5b962328a0 [2023-12-02 16:17:42,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:17:42,354 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:17:42,356 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:17:42,356 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:17:42,361 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:17:42,362 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:17:42" (1/1) ... [2023-12-02 16:17:42,363 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46606882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:42, skipping insertion in model container [2023-12-02 16:17:42,363 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:17:42" (1/1) ... [2023-12-02 16:17:42,469 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:17:42,678 WARN L240 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_eee6680d-334e-43d4-b7bd-6520ecd44fb3/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2023-12-02 16:17:42,686 WARN L240 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_eee6680d-334e-43d4-b7bd-6520ecd44fb3/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2023-12-02 16:17:43,440 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,441 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,442 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,442 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,444 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,457 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,457 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,458 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,459 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,460 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,461 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,462 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,462 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:43,817 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 16:17:43,818 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 16:17:43,819 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 16:17:43,821 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 16:17:43,823 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 16:17:43,824 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 16:17:43,825 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 16:17:43,825 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 16:17:43,826 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 16:17:43,827 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 16:17:43,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:17:44,031 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:17:44,042 WARN L240 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_eee6680d-334e-43d4-b7bd-6520ecd44fb3/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2023-12-02 16:17:44,043 WARN L240 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_eee6680d-334e-43d4-b7bd-6520ecd44fb3/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2023-12-02 16:17:44,085 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,086 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,086 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,087 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,088 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,097 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,097 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,098 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,099 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,100 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,101 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,101 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,101 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:17:44,135 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 16:17:44,136 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 16:17:44,137 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 16:17:44,138 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 16:17:44,139 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 16:17:44,139 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 16:17:44,140 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 16:17:44,140 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 16:17:44,141 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 16:17:44,141 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 16:17:44,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:17:44,387 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,387 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,387 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,387 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,388 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,388 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,388 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,388 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,388 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,388 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,389 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,389 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,389 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,389 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,389 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,389 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:17:44,397 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:17:44,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44 WrapperNode [2023-12-02 16:17:44,398 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:17:44,399 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:17:44,399 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:17:44,399 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:17:44,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44" (1/1) ... [2023-12-02 16:17:44,464 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44" (1/1) ... [2023-12-02 16:17:44,504 INFO L138 Inliner]: procedures = 678, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2023-12-02 16:17:44,504 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:17:44,505 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:17:44,505 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:17:44,505 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:17:44,514 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44" (1/1) ... [2023-12-02 16:17:44,514 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44" (1/1) ... [2023-12-02 16:17:44,518 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44" (1/1) ... [2023-12-02 16:17:44,519 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44" (1/1) ... [2023-12-02 16:17:44,532 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44" (1/1) ... [2023-12-02 16:17:44,536 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44" (1/1) ... [2023-12-02 16:17:44,540 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44" (1/1) ... [2023-12-02 16:17:44,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44" (1/1) ... [2023-12-02 16:17:44,549 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:17:44,550 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:17:44,550 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:17:44,550 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:17:44,551 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44" (1/1) ... [2023-12-02 16:17:44,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:17:44,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:17:44,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:17:44,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:17:44,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:17:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 16:17:44,617 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 16:17:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-12-02 16:17:44,617 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-12-02 16:17:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 16:17:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2023-12-02 16:17:44,617 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2023-12-02 16:17:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:17:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 16:17:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:17:44,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:17:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 16:17:44,618 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 16:17:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 16:17:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 16:17:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 16:17:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 16:17:44,618 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 16:17:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:17:44,819 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:17:44,821 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:17:45,025 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:17:45,119 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:17:45,119 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 16:17:45,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:17:45 BoogieIcfgContainer [2023-12-02 16:17:45,121 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:17:45,123 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:17:45,123 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:17:45,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:17:45,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:17:42" (1/3) ... [2023-12-02 16:17:45,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6012c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:17:45, skipping insertion in model container [2023-12-02 16:17:45,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:17:44" (2/3) ... [2023-12-02 16:17:45,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6012c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:17:45, skipping insertion in model container [2023-12-02 16:17:45,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:17:45" (3/3) ... [2023-12-02 16:17:45,129 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2023-12-02 16:17:45,145 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:17:45,145 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:17:45,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:17:45,190 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=LoopHeads, 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;@3a95f536, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:17:45,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:17:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-02 16:17:45,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 16:17:45,201 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:17:45,202 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:17:45,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:17:45,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:17:45,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1560832993, now seen corresponding path program 1 times [2023-12-02 16:17:45,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:17:45,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65952044] [2023-12-02 16:17:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:17:45,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:17:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:17:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:17:45,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:17:45,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65952044] [2023-12-02 16:17:45,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65952044] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:17:45,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480689031] [2023-12-02 16:17:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:17:45,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:17:45,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:17:45,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:17:45,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:17:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:17:46,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-02 16:17:46,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:17:46,186 INFO L378 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 14 treesize of output 15 [2023-12-02 16:17:46,204 INFO L378 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 14 treesize of output 15 [2023-12-02 16:17:46,302 INFO L378 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 29 treesize of output 35 [2023-12-02 16:17:46,328 INFO L378 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 33 treesize of output 28 [2023-12-02 16:17:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:17:49,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:17:49,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480689031] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:17:49,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:17:49,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2023-12-02 16:17:49,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615111955] [2023-12-02 16:17:49,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:17:49,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:17:49,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:17:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:17:49,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:17:49,154 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 16:17:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:17:49,812 INFO L93 Difference]: Finished difference Result 121 states and 170 transitions. [2023-12-02 16:17:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:17:49,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2023-12-02 16:17:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:17:49,823 INFO L225 Difference]: With dead ends: 121 [2023-12-02 16:17:49,824 INFO L226 Difference]: Without dead ends: 79 [2023-12-02 16:17:49,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:17:49,831 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 27 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:17:49,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 326 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:17:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-02 16:17:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-12-02 16:17:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 43 states have (on average 1.302325581395349) internal successors, (56), 45 states have internal predecessors, (56), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-02 16:17:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2023-12-02 16:17:49,883 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 37 [2023-12-02 16:17:49,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:17:49,884 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2023-12-02 16:17:49,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 16:17:49,884 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2023-12-02 16:17:49,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 16:17:49,887 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:17:49,887 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:17:49,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:17:50,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 16:17:50,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:17:50,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:17:50,089 INFO L85 PathProgramCache]: Analyzing trace with hash 908297880, now seen corresponding path program 1 times [2023-12-02 16:17:50,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:17:50,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149137508] [2023-12-02 16:17:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:17:50,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:17:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:17:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 16:17:50,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:17:50,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149137508] [2023-12-02 16:17:50,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149137508] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:17:50,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849639240] [2023-12-02 16:17:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:17:50,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:17:50,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:17:50,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:17:50,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:17:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:17:50,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-02 16:17:50,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:17:50,620 INFO L378 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 14 treesize of output 15 [2023-12-02 16:17:50,630 INFO L378 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 14 treesize of output 15 [2023-12-02 16:17:50,691 INFO L378 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2023-12-02 16:17:50,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:17:50,698 INFO L378 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 30 treesize of output 21 [2023-12-02 16:17:50,713 INFO L378 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 31 treesize of output 36 [2023-12-02 16:17:50,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:17:50,719 INFO L378 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 23 treesize of output 16 [2023-12-02 16:17:50,799 INFO L349 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2023-12-02 16:17:50,799 INFO L378 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 171 treesize of output 163 [2023-12-02 16:17:50,806 INFO L378 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 143 treesize of output 129 [2023-12-02 16:17:50,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:17:50,818 INFO L378 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 55 treesize of output 26 [2023-12-02 16:17:50,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:17:50,826 INFO L378 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 94 treesize of output 21 [2023-12-02 16:17:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:17:51,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:17:56,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:17:56,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 364 treesize of output 449 [2023-12-02 16:17:56,375 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-02 16:17:56,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 19 [2023-12-02 16:17:56,396 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-02 16:17:56,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 19 [2023-12-02 16:17:56,414 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-02 16:17:56,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 19 [2023-12-02 16:17:56,463 INFO L349 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-12-02 16:17:56,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 58 [2023-12-02 16:17:56,516 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-02 16:17:56,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 19 [2023-12-02 16:17:56,540 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-02 16:17:56,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 19 [2023-12-02 16:17:56,601 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 16:17:56,601 INFO L378 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 1 case distinctions, treesize of input 14 treesize of output 1 [2023-12-02 16:17:56,856 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse14 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 8)) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse12 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16))) (and (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (forall ((v_arrayElimArr_6 (Array Int Int)) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16| Int) (v_DerPreprocessor_17 Int) (v_DerPreprocessor_18 Int) (v_subst_4 Int) (v_subst_2 Int)) (or (not (= v_DerPreprocessor_17 (select (store (store v_arrayElimArr_6 v_subst_4 v_DerPreprocessor_17) v_subst_2 v_DerPreprocessor_18) v_subst_4))) (= (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_arrayElimArr_6))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_4))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (forall ((v_arrayElimArr_6 (Array Int Int)) (v_DerPreprocessor_24 Int) (v_DerPreprocessor_22 Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16| Int) (v_DerPreprocessor_23 Int) (v_subst_4 Int) (v_subst_2 Int) (v_subst_1 Int)) (let ((.cse4 (store (store (store v_arrayElimArr_6 v_subst_1 v_DerPreprocessor_22) v_subst_2 v_DerPreprocessor_23) v_subst_4 v_DerPreprocessor_24))) (or (= v_subst_4 v_subst_1) (not (= (store (store v_arrayElimArr_6 v_subst_1 (select .cse4 v_subst_1)) v_subst_4 v_DerPreprocessor_24) .cse4)) (= (select (select (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_arrayElimArr_6))) (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_1))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0) (= v_subst_2 v_subst_1) (not (= (select .cse4 v_subst_2) v_DerPreprocessor_23))))) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0) (forall ((v_arrayElimArr_6 (Array Int Int)) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16| Int) (v_subst_4 Int) (v_subst_2 Int) (v_DerPreprocessor_20 Int) (v_DerPreprocessor_21 Int)) (or (= (select (select (let ((.cse6 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_arrayElimArr_6))) (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_2))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0) (not (= v_DerPreprocessor_20 (select (store (store v_arrayElimArr_6 v_subst_2 v_DerPreprocessor_20) v_subst_4 v_DerPreprocessor_21) v_subst_2))))))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (let ((.cse9 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24))) (or (forall ((v_DerPreprocessor_13 Int) (v_arrayElimArr_5 (Array Int Int)) (v_DerPreprocessor_14 Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16| Int) (v_DerPreprocessor_15 Int) (v_DerPreprocessor_16 Int) (v_subst_4 Int) (v_subst_3 Int) (v_subst_2 Int)) (let ((.cse10 (store v_arrayElimArr_5 v_subst_3 v_DerPreprocessor_15))) (let ((.cse7 (store (store .cse10 v_subst_2 v_DerPreprocessor_13) v_subst_4 v_DerPreprocessor_14))) (or (not (= v_DerPreprocessor_13 (select .cse7 v_subst_2))) (not (= .cse7 (store (store v_arrayElimArr_5 v_subst_3 (select .cse7 v_subst_3)) v_subst_4 v_DerPreprocessor_14))) (not (= 0 (select (select (let ((.cse8 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_arrayElimArr_5))) (store .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_3))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse9))) (not (= v_DerPreprocessor_15 (select (store .cse10 v_subst_2 v_DerPreprocessor_16) v_subst_3))))))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (forall ((v_prenex_4 (Array Int Int))) (not (= (select (select (let ((.cse11 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse12 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_prenex_4))) (store .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse9) 0))) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0)))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (forall ((v_DerPreprocessor_25 Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16| Int) (v_arrayElimArr_7 (Array Int Int)) (v_DerPreprocessor_26 Int) (v_subst_4 Int) (v_subst_2 Int)) (or (= (select (select (let ((.cse13 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_arrayElimArr_7))) (store .cse13 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse13 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_2))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse14) 0) (not (= (select (store (store v_arrayElimArr_7 v_subst_2 v_DerPreprocessor_25) v_subst_4 v_DerPreprocessor_26) v_subst_2) v_DerPreprocessor_25)))) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (forall ((v_arrayElimArr_8 (Array Int Int)) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16| Int) (v_subst_4 Int)) (not (= 0 (select (select (let ((.cse15 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_arrayElimArr_8))) (store .cse15 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse15 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_4))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0) (forall ((v_prenex_1 (Array Int Int))) (not (= (select (select (let ((.cse16 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse12 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_prenex_1))) (store .cse16 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse16 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))))) (or (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0) (forall ((v_prenex_6 (Array Int Int))) (= (select (select (let ((.cse17 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse12 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_prenex_6))) (store .cse17 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse17 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse14) 0)))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (forall ((v_ArrVal_185 (Array Int Int))) (= (select (select (let ((.cse18 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse12 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_ArrVal_185))) (store .cse18 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse18 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0))))) is different from false [2023-12-02 16:17:57,008 INFO L349 Elim1Store]: treesize reduction 88, result has 44.7 percent of original size [2023-12-02 16:17:57,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 242 treesize of output 228 [2023-12-02 16:17:57,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:17:57,036 INFO L378 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 149 treesize of output 147 [2023-12-02 16:17:57,051 INFO L378 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 145 treesize of output 133 [2023-12-02 16:17:57,073 INFO L378 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 [2023-12-02 16:17:57,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:17:57,219 INFO L378 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 139 treesize of output 141 [2023-12-02 16:17:57,447 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:17:57,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:17:57,462 INFO L378 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 35 treesize of output 46 [2023-12-02 16:17:57,467 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2023-12-02 16:17:57,483 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,490 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 16:17:57,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 31 [2023-12-02 16:17:57,503 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:17:57,508 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,508 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,515 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-12-02 16:17:57,515 INFO L378 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 35 treesize of output 1 [2023-12-02 16:17:57,519 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:17:57,522 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,523 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,527 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-12-02 16:17:57,527 INFO L378 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 35 treesize of output 1 [2023-12-02 16:17:57,532 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,533 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,537 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-12-02 16:17:57,540 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:17:57,544 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,544 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,548 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-12-02 16:17:57,548 INFO L378 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 35 treesize of output 1 [2023-12-02 16:17:57,553 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:17:57,561 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,562 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,566 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-12-02 16:17:57,566 INFO L378 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 35 treesize of output 1 [2023-12-02 16:17:57,570 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,571 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:17:57,574 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-12-02 16:17:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2023-12-02 16:17:57,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849639240] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:17:57,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [882544362] [2023-12-02 16:17:57,682 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 16:17:57,682 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:17:57,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:17:57,691 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:17:57,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:18:00,456 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 106 for LOIs [2023-12-02 16:18:00,529 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 16 for LOIs [2023-12-02 16:18:00,532 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-12-02 16:18:00,546 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:18:02,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [882544362] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:18:02,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:18:02,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 9, 8] total 28 [2023-12-02 16:18:02,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494606491] [2023-12-02 16:18:02,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:18:02,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 16:18:02,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:18:02,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 16:18:02,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=619, Unknown=3, NotChecked=50, Total=756 [2023-12-02 16:18:02,812 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 16:18:05,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:18:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:07,085 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2023-12-02 16:18:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 16:18:07,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2023-12-02 16:18:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:07,089 INFO L225 Difference]: With dead ends: 141 [2023-12-02 16:18:07,089 INFO L226 Difference]: Without dead ends: 103 [2023-12-02 16:18:07,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=111, Invalid=820, Unknown=3, NotChecked=58, Total=992 [2023-12-02 16:18:07,090 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:07,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 213 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 279 Invalid, 2 Unknown, 0 Unchecked, 3.3s Time] [2023-12-02 16:18:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-02 16:18:07,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2023-12-02 16:18:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 64 states have internal predecessors, (83), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-02 16:18:07,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2023-12-02 16:18:07,118 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 38 [2023-12-02 16:18:07,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:07,118 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2023-12-02 16:18:07,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 16:18:07,119 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2023-12-02 16:18:07,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 16:18:07,120 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:07,120 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:07,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:18:07,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:07,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:18:07,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1333622316, now seen corresponding path program 1 times [2023-12-02 16:18:07,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:18:07,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11039522] [2023-12-02 16:18:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:07,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:18:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 16:18:07,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:18:07,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11039522] [2023-12-02 16:18:07,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11039522] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:18:07,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210741141] [2023-12-02 16:18:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:07,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:07,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:18:07,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:18:07,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:18:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:07,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:18:07,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 16:18:07,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:18:07,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210741141] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:18:07,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:18:07,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 16:18:07,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737985124] [2023-12-02 16:18:07,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:18:07,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:18:07,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:18:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:18:07,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:18:07,748 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:18:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:07,874 INFO L93 Difference]: Finished difference Result 179 states and 235 transitions. [2023-12-02 16:18:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:18:07,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 40 [2023-12-02 16:18:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:07,876 INFO L225 Difference]: With dead ends: 179 [2023-12-02 16:18:07,876 INFO L226 Difference]: Without dead ends: 107 [2023-12-02 16:18:07,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:18:07,879 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:07,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 147 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:18:07,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-02 16:18:07,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-12-02 16:18:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 70 states have internal predecessors, (85), 26 states have call successors, (26), 12 states have call predecessors, (26), 14 states have return successors, (28), 24 states have call predecessors, (28), 24 states have call successors, (28) [2023-12-02 16:18:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2023-12-02 16:18:07,910 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 40 [2023-12-02 16:18:07,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:07,910 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2023-12-02 16:18:07,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:18:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2023-12-02 16:18:07,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 16:18:07,913 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:07,913 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:07,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 16:18:08,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:08,114 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:18:08,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:08,114 INFO L85 PathProgramCache]: Analyzing trace with hash -854801734, now seen corresponding path program 1 times [2023-12-02 16:18:08,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:18:08,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742552654] [2023-12-02 16:18:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:08,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:18:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 16:18:08,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:18:08,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742552654] [2023-12-02 16:18:08,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742552654] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:18:08,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759117618] [2023-12-02 16:18:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:08,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:08,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:18:08,287 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:18:08,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:18:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:08,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:18:08,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 16:18:08,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:18:08,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759117618] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:18:08,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:18:08,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-12-02 16:18:08,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963752567] [2023-12-02 16:18:08,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:18:08,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:18:08,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:18:08,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:18:08,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:18:08,539 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:18:08,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:08,736 INFO L93 Difference]: Finished difference Result 219 states and 293 transitions. [2023-12-02 16:18:08,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:18:08,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-12-02 16:18:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:08,739 INFO L225 Difference]: With dead ends: 219 [2023-12-02 16:18:08,739 INFO L226 Difference]: Without dead ends: 139 [2023-12-02 16:18:08,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-12-02 16:18:08,741 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 52 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:08,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 170 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:18:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-02 16:18:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 113. [2023-12-02 16:18:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 76 states have internal predecessors, (93), 26 states have call successors, (26), 12 states have call predecessors, (26), 14 states have return successors, (28), 24 states have call predecessors, (28), 24 states have call successors, (28) [2023-12-02 16:18:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 147 transitions. [2023-12-02 16:18:08,777 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 147 transitions. Word has length 42 [2023-12-02 16:18:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:08,777 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 147 transitions. [2023-12-02 16:18:08,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:18:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 147 transitions. [2023-12-02 16:18:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 16:18:08,780 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:08,780 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:08,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:18:08,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:08,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:18:08,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1388051353, now seen corresponding path program 1 times [2023-12-02 16:18:08,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:18:08,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903158899] [2023-12-02 16:18:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:08,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:18:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 16:18:09,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:18:09,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903158899] [2023-12-02 16:18:09,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903158899] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:18:09,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919750220] [2023-12-02 16:18:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:09,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:09,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:18:09,253 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:18:09,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:18:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:09,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:18:09,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:18:09,431 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:18:09,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919750220] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:18:09,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:18:09,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-12-02 16:18:09,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110773779] [2023-12-02 16:18:09,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:18:09,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:18:09,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:18:09,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:18:09,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:18:09,433 INFO L87 Difference]: Start difference. First operand 113 states and 147 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:18:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:09,505 INFO L93 Difference]: Finished difference Result 215 states and 291 transitions. [2023-12-02 16:18:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:18:09,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-12-02 16:18:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:09,507 INFO L225 Difference]: With dead ends: 215 [2023-12-02 16:18:09,507 INFO L226 Difference]: Without dead ends: 131 [2023-12-02 16:18:09,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:18:09,509 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 4 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:09,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 84 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:18:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-02 16:18:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2023-12-02 16:18:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 80 states have internal predecessors, (97), 26 states have call successors, (26), 12 states have call predecessors, (26), 14 states have return successors, (28), 24 states have call predecessors, (28), 24 states have call successors, (28) [2023-12-02 16:18:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2023-12-02 16:18:09,538 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 43 [2023-12-02 16:18:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:09,539 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2023-12-02 16:18:09,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:18:09,539 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2023-12-02 16:18:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 16:18:09,541 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:09,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:09,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:18:09,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:09,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:18:09,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:09,747 INFO L85 PathProgramCache]: Analyzing trace with hash -486418701, now seen corresponding path program 1 times [2023-12-02 16:18:09,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:18:09,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384376831] [2023-12-02 16:18:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:09,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:18:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 16:18:09,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:18:09,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384376831] [2023-12-02 16:18:09,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384376831] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:18:09,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71561870] [2023-12-02 16:18:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:09,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:09,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:18:09,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:18:09,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:18:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:10,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 79 conjunts are in the unsatisfiable core [2023-12-02 16:18:10,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:10,271 INFO L378 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 16 treesize of output 16 [2023-12-02 16:18:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:18:10,281 INFO L378 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 16 treesize of output 11 [2023-12-02 16:18:10,333 INFO L349 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2023-12-02 16:18:10,333 INFO L378 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 99 treesize of output 103 [2023-12-02 16:18:10,338 INFO L378 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 83 treesize of output 67 [2023-12-02 16:18:10,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:18:10,347 INFO L378 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 55 treesize of output 20 [2023-12-02 16:18:10,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:18:10,354 INFO L378 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 21 treesize of output 1 [2023-12-02 16:18:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:18:17,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:18:20,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71561870] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:18:20,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [517794952] [2023-12-02 16:18:20,448 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 16:18:20,448 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:18:20,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:18:20,448 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:18:20,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:18:22,178 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 105 for LOIs [2023-12-02 16:18:22,274 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 17 for LOIs [2023-12-02 16:18:22,278 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-12-02 16:18:22,289 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 8 for LOIs [2023-12-02 16:18:22,311 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:18:39,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [517794952] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:18:39,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:18:39,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6, 15, 8] total 40 [2023-12-02 16:18:39,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176857035] [2023-12-02 16:18:39,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:18:39,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 16:18:39,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:18:39,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 16:18:39,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1418, Unknown=7, NotChecked=0, Total=1560 [2023-12-02 16:18:39,148 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 16:18:43,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:18:53,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:53,892 INFO L93 Difference]: Finished difference Result 229 states and 299 transitions. [2023-12-02 16:18:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 16:18:53,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2023-12-02 16:18:53,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:53,894 INFO L225 Difference]: With dead ends: 229 [2023-12-02 16:18:53,894 INFO L226 Difference]: Without dead ends: 137 [2023-12-02 16:18:53,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 94 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=194, Invalid=2051, Unknown=11, NotChecked=0, Total=2256 [2023-12-02 16:18:53,897 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:53,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 252 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 400 Invalid, 3 Unknown, 0 Unchecked, 3.7s Time] [2023-12-02 16:18:53,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-02 16:18:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2023-12-02 16:18:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 78 states have internal predecessors, (89), 26 states have call successors, (26), 12 states have call predecessors, (26), 14 states have return successors, (28), 24 states have call predecessors, (28), 24 states have call successors, (28) [2023-12-02 16:18:53,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2023-12-02 16:18:53,937 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 46 [2023-12-02 16:18:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:53,938 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2023-12-02 16:18:53,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 16:18:53,938 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2023-12-02 16:18:53,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 16:18:53,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:53,940 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:53,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:18:54,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:54,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:18:54,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:54,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1091852774, now seen corresponding path program 1 times [2023-12-02 16:18:54,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:18:54,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594206111] [2023-12-02 16:18:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:54,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:18:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 16:18:54,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:18:54,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594206111] [2023-12-02 16:18:54,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594206111] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:18:54,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560634935] [2023-12-02 16:18:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:54,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:54,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:18:54,356 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:18:54,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:18:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:54,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 16:18:54,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:54,683 INFO L378 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 16 treesize of output 16 [2023-12-02 16:18:54,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:18:54,688 INFO L378 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 16 treesize of output 11 [2023-12-02 16:18:54,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:18:54,717 INFO L378 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 63 treesize of output 11 [2023-12-02 16:18:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:18:54,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:02,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:19:02,175 INFO L378 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 48 treesize of output 41 [2023-12-02 16:19:02,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:19:02,182 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-12-02 16:19:02,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:19:02,202 INFO L378 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 171 treesize of output 185 [2023-12-02 16:19:02,210 INFO L378 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 184 treesize of output 176 [2023-12-02 16:19:02,281 INFO L378 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 [2023-12-02 16:19:02,340 INFO L378 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 6 [2023-12-02 16:19:02,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:19:02,351 INFO L378 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 73 treesize of output 75 [2023-12-02 16:19:02,398 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:19:02,401 INFO L378 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 19 treesize of output 15 [2023-12-02 16:19:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:19:02,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560634935] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:19:02,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1069585646] [2023-12-02 16:19:02,515 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 16:19:02,515 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:19:02,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:19:02,515 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:19:02,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:19:05,797 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 115 for LOIs [2023-12-02 16:19:06,037 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 106 for LOIs [2023-12-02 16:19:06,155 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2023-12-02 16:19:06,157 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-12-02 16:19:06,168 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 1 for LOIs [2023-12-02 16:19:06,189 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:19:18,072 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3923#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_#memory_int_30| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_13| Int) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_22| Int) (|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3| Int) (|v_#memory_$Pointer$.base_89| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_13| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_13| Int) (|v_#memory_$Pointer$.offset_92| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_22| Int) (|v_#memory_real_91| (Array Int (Array Int Real))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_38| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_16| Int) (|v_#memory_int_94| (Array Int (Array Int Int)))) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_38|) (<= 1 |#StackHeapBarrier|) (= |#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22| (store (select |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24 (select (select |#memory_real| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24)))) (<= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= (store (store |v_#memory_$Pointer$.base_89| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24) (store (select |v_#memory_$Pointer$.base_89| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24)) 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22| (store (select (store |v_#memory_$Pointer$.base_89| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24) (store (select |v_#memory_$Pointer$.base_89| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24)) 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24))) |#memory_$Pointer$.base|) (= (store |v_#memory_real_91| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24) (store (select |v_#memory_real_91| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24)) 0 (select (select |v_#memory_real_27| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24)) 0))) |v_#memory_real_27|) (= |#memory_int| (store |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22| (store (select |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24 (select (select |#memory_int| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24)))) (<= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_13|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_13| 0) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_92| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24) (store (select |v_#memory_$Pointer$.offset_92| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24)) 0 16)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22| (store (select (store |v_#memory_$Pointer$.offset_92| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24) (store (select |v_#memory_$Pointer$.offset_92| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24)) 0 16)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24 0))) (= (store |v_#memory_int_94| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24) (store (select |v_#memory_int_94| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24)) 0 (select (select |v_#memory_int_30| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_22|) 24)) 0))) |v_#memory_int_30|) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_22| 18446744073709551616) (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_38| 18446744073709551616)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_22| 0) (= ~tl_last_error~0 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_13| 20) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_16| 20) (= 16 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.offset_BEFORE_CALL_3|))) (<= |__VERIFIER_assert_#in~cond| 1))' at error location [2023-12-02 16:19:18,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:19:18,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:19:18,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 11] total 24 [2023-12-02 16:19:18,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245720108] [2023-12-02 16:19:18,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:19:18,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 16:19:18,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:19:18,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 16:19:18,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2102, Unknown=19, NotChecked=0, Total=2256 [2023-12-02 16:19:18,075 INFO L87 Difference]: Start difference. First operand 115 states and 143 transitions. Second operand has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2023-12-02 16:19:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:19:19,913 INFO L93 Difference]: Finished difference Result 205 states and 268 transitions. [2023-12-02 16:19:19,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 16:19:19,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 49 [2023-12-02 16:19:19,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:19:19,915 INFO L225 Difference]: With dead ends: 205 [2023-12-02 16:19:19,915 INFO L226 Difference]: Without dead ends: 161 [2023-12-02 16:19:19,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=250, Invalid=3271, Unknown=19, NotChecked=0, Total=3540 [2023-12-02 16:19:19,917 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 130 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:19:19,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 418 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 16:19:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-02 16:19:19,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 126. [2023-12-02 16:19:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 87 states have internal predecessors, (100), 28 states have call successors, (28), 12 states have call predecessors, (28), 15 states have return successors, (32), 26 states have call predecessors, (32), 26 states have call successors, (32) [2023-12-02 16:19:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2023-12-02 16:19:19,959 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 49 [2023-12-02 16:19:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:19:19,960 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2023-12-02 16:19:19,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2023-12-02 16:19:19,960 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2023-12-02 16:19:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 16:19:19,961 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:19:19,961 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:19:19,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 16:19:20,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:19:20,162 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:19:20,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:19:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1689220813, now seen corresponding path program 1 times [2023-12-02 16:19:20,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:19:20,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082156767] [2023-12-02 16:19:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:20,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:19:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:19:20,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:19:20,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082156767] [2023-12-02 16:19:20,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082156767] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:20,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894959968] [2023-12-02 16:19:20,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:20,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:19:20,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:19:20,542 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:19:20,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:19:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:20,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:19:20,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 16:19:20,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:19:20,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894959968] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:19:20,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:19:20,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2023-12-02 16:19:20,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382960968] [2023-12-02 16:19:20,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:19:20,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:19:20,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:19:20,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:19:20,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-12-02 16:19:20,853 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:19:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:19:21,049 INFO L93 Difference]: Finished difference Result 206 states and 262 transitions. [2023-12-02 16:19:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:19:21,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2023-12-02 16:19:21,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:19:21,051 INFO L225 Difference]: With dead ends: 206 [2023-12-02 16:19:21,051 INFO L226 Difference]: Without dead ends: 123 [2023-12-02 16:19:21,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:19:21,052 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 29 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:19:21,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 182 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:19:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-02 16:19:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-12-02 16:19:21,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 80 states have (on average 1.2) internal successors, (96), 84 states have internal predecessors, (96), 28 states have call successors, (28), 12 states have call predecessors, (28), 14 states have return successors, (30), 26 states have call predecessors, (30), 26 states have call successors, (30) [2023-12-02 16:19:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 154 transitions. [2023-12-02 16:19:21,090 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 154 transitions. Word has length 52 [2023-12-02 16:19:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:19:21,090 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 154 transitions. [2023-12-02 16:19:21,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:19:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 154 transitions. [2023-12-02 16:19:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 16:19:21,091 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:19:21,091 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:19:21,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 16:19:21,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:19:21,292 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:19:21,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:19:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash 836604704, now seen corresponding path program 1 times [2023-12-02 16:19:21,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:19:21,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852926372] [2023-12-02 16:19:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:21,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:19:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 16:19:21,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:19:21,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852926372] [2023-12-02 16:19:21,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852926372] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:21,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987889134] [2023-12-02 16:19:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:21,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:19:21,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:19:21,524 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:19:21,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:19:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:21,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 16:19:21,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 16:19:21,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 16:19:21,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987889134] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:19:21,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610816834] [2023-12-02 16:19:21,995 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 16:19:21,996 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:19:21,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:19:21,996 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:19:21,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:19:25,658 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 115 for LOIs [2023-12-02 16:19:25,892 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 106 for LOIs [2023-12-02 16:19:26,016 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2023-12-02 16:19:26,018 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-12-02 16:19:26,031 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 1 for LOIs [2023-12-02 16:19:26,051 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:19:35,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5466#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_42| Int) (|v_#memory_int_30| (Array Int (Array Int Int))) (|v_#memory_int_109| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_14| Int) (|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_7| Int) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_#memory_$Pointer$.base_94| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_23| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_30| Int) (|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_14| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_14| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| Int) (|v_#memory_$Pointer$.offset_97| (Array Int (Array Int Int))) (|v_#memory_real_106| (Array Int (Array Int Real))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_17| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_42|) (or (and (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_14| 20) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_17| 20) (= 16 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.offset_BEFORE_CALL_7|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_30| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_14| 0) (= ~tl_last_error~0 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) 24) 0)) (and (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_14| 20) (= |~#s_can_fail_allocator_static~0.base| 4) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_42| 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_17| 20) (= 16 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.offset_BEFORE_CALL_7|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_14| 0) (= ~tl_last_error~0 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) 24) 0))) (<= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (= |v_#memory_int_30| (store |v_#memory_int_109| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)) (store (select |v_#memory_int_109| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)) (select (select |v_#memory_int_30| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)))))) (= (store (store |v_#memory_$Pointer$.base_94| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)) (store (select |v_#memory_$Pointer$.base_94| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23| (store (select (store |v_#memory_$Pointer$.base_94| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)) (store (select |v_#memory_$Pointer$.base_94| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)))) |#memory_$Pointer$.base|) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_23| 18446744073709551616) (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_42| 18446744073709551616)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_7|) (= |v_#memory_real_27| (store |v_#memory_real_106| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)) (store (select |v_#memory_real_106| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)) (select (select |v_#memory_real_27| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)))))) (<= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_14|) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_97| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)) (store (select |v_#memory_$Pointer$.offset_97| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23|))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23| (store (select (store |v_#memory_$Pointer$.offset_97| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)) (store (select |v_#memory_$Pointer$.offset_97| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24)) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23|))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24))))) (= |#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23| (store (select |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24) (select (select |#memory_real| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24))))) (= |#memory_int| (store |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23| (store (select |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24) (select (select |#memory_int| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_23|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_23| 24))))))) (<= |__VERIFIER_assert_#in~cond| 1))' at error location [2023-12-02 16:19:35,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:19:35,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:19:35,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2023-12-02 16:19:35,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480848080] [2023-12-02 16:19:35,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:19:35,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 16:19:35,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:19:35,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 16:19:35,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1451, Unknown=18, NotChecked=0, Total=1560 [2023-12-02 16:19:35,614 INFO L87 Difference]: Start difference. First operand 123 states and 154 transitions. Second operand has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-02 16:19:35,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:19:35,982 INFO L93 Difference]: Finished difference Result 209 states and 269 transitions. [2023-12-02 16:19:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 16:19:35,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 63 [2023-12-02 16:19:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:19:35,984 INFO L225 Difference]: With dead ends: 209 [2023-12-02 16:19:35,984 INFO L226 Difference]: Without dead ends: 139 [2023-12-02 16:19:35,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=107, Invalid=1681, Unknown=18, NotChecked=0, Total=1806 [2023-12-02 16:19:35,985 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 5 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:19:35,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 571 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:19:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-02 16:19:36,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 127. [2023-12-02 16:19:36,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 88 states have internal predecessors, (99), 28 states have call successors, (28), 12 states have call predecessors, (28), 15 states have return successors, (32), 26 states have call predecessors, (32), 26 states have call successors, (32) [2023-12-02 16:19:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 159 transitions. [2023-12-02 16:19:36,029 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 159 transitions. Word has length 63 [2023-12-02 16:19:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:19:36,029 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 159 transitions. [2023-12-02 16:19:36,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-02 16:19:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 159 transitions. [2023-12-02 16:19:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 16:19:36,031 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:19:36,031 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:19:36,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 16:19:36,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:19:36,232 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:19:36,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:19:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2040076730, now seen corresponding path program 1 times [2023-12-02 16:19:36,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:19:36,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031695051] [2023-12-02 16:19:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:36,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:19:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 16:19:36,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:19:36,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031695051] [2023-12-02 16:19:36,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031695051] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:36,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509186944] [2023-12-02 16:19:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:36,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:19:36,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:19:36,433 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:19:36,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 16:19:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:36,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-02 16:19:36,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:36,708 INFO L378 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 13 treesize of output 1 [2023-12-02 16:19:36,711 INFO L378 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 13 treesize of output 1 [2023-12-02 16:19:38,817 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_6| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_6|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_6| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_6|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6|) 0)))) is different from true [2023-12-02 16:19:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2023-12-02 16:19:39,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 16:19:40,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509186944] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:19:40,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1507967806] [2023-12-02 16:19:40,120 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 16:19:40,121 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:19:40,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:19:40,121 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:19:40,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:19:43,181 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 115 for LOIs [2023-12-02 16:19:43,454 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 106 for LOIs [2023-12-02 16:19:43,602 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2023-12-02 16:19:43,603 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-12-02 16:19:43,615 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 1 for LOIs [2023-12-02 16:19:43,635 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:20:11,041 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6384#(and (<= 0 |__VERIFIER_assert_#in~cond|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_15| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_15| Int) (|v_#memory_int_30| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_107| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_24| Int) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_15| Int) (|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11| Int) (|v_#memory_real_117| (Array Int (Array Int Real))) (|v_#memory_$Pointer$.base_104| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_46| Int) (|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.offset_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_18| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_24| Int) (|v_#memory_int_120| (Array Int (Array Int Int)))) (and (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_18| 20) (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_24| 0) (= |~#s_can_fail_allocator_static~0.base| 4) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_107| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24) (store (select |v_#memory_$Pointer$.offset_107| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24)) 0 16)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25| (store (select (store |v_#memory_$Pointer$.offset_107| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24) (store (select |v_#memory_$Pointer$.offset_107| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24)) 0 16)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24 0))) (= |#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25| (store (select |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24 (select (select |#memory_real| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24)))) (<= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |v_#memory_real_27| (store |v_#memory_real_117| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24) (store (select |v_#memory_real_117| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24)) 0 (select (select |v_#memory_real_27| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24)) 0)))) (= |v_#memory_int_30| (store |v_#memory_int_120| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24) (store (select |v_#memory_int_120| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24)) 0 (select (select |v_#memory_int_30| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24)) 0)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_46|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_15| 0) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_104| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24) (store (select |v_#memory_$Pointer$.base_104| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24)) 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25| (store (select (store |v_#memory_$Pointer$.base_104| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24) (store (select |v_#memory_$Pointer$.base_104| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24)) 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24)))) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_24| 18446744073709551616) (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_46| 18446744073709551616)) (= ~tl_last_error~0 0) (<= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_15|) (= |#memory_int| (store |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25| (store (select |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24 (select (select |#memory_int| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_25|) 24)))) (= 16 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.offset_BEFORE_CALL_11|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_15| 20))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= |__VERIFIER_assert_#in~cond| 1))' at error location [2023-12-02 16:20:11,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:20:11,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:20:11,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18, 14] total 34 [2023-12-02 16:20:11,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480104574] [2023-12-02 16:20:11,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:20:11,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 16:20:11,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:20:11,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 16:20:11,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2874, Unknown=26, NotChecked=108, Total=3192 [2023-12-02 16:20:11,044 INFO L87 Difference]: Start difference. First operand 127 states and 159 transitions. Second operand has 34 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 31 states have internal predecessors, (88), 15 states have call successors, (26), 4 states have call predecessors, (26), 9 states have return successors, (26), 12 states have call predecessors, (26), 15 states have call successors, (26) [2023-12-02 16:20:13,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:20:15,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:20:17,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:20:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:19,799 INFO L93 Difference]: Finished difference Result 249 states and 322 transitions. [2023-12-02 16:20:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-02 16:20:19,799 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 31 states have internal predecessors, (88), 15 states have call successors, (26), 4 states have call predecessors, (26), 9 states have return successors, (26), 12 states have call predecessors, (26), 15 states have call successors, (26) Word has length 65 [2023-12-02 16:20:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:19,801 INFO L225 Difference]: With dead ends: 249 [2023-12-02 16:20:19,801 INFO L226 Difference]: Without dead ends: 169 [2023-12-02 16:20:19,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=678, Invalid=6272, Unknown=26, NotChecked=164, Total=7140 [2023-12-02 16:20:19,805 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 181 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 88 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:19,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 469 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1077 Invalid, 3 Unknown, 188 Unchecked, 6.9s Time] [2023-12-02 16:20:19,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-12-02 16:20:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2023-12-02 16:20:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 95 states have internal predecessors, (106), 29 states have call successors, (29), 15 states have call predecessors, (29), 18 states have return successors, (33), 27 states have call predecessors, (33), 27 states have call successors, (33) [2023-12-02 16:20:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 168 transitions. [2023-12-02 16:20:19,886 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 168 transitions. Word has length 65 [2023-12-02 16:20:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:19,887 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 168 transitions. [2023-12-02 16:20:19,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 31 states have internal predecessors, (88), 15 states have call successors, (26), 4 states have call predecessors, (26), 9 states have return successors, (26), 12 states have call predecessors, (26), 15 states have call successors, (26) [2023-12-02 16:20:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 168 transitions. [2023-12-02 16:20:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 16:20:19,888 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:19,888 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 16:20:19,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 16:20:20,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 16:20:20,089 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:20:20,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:20,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1429331635, now seen corresponding path program 2 times [2023-12-02 16:20:20,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:20:20,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830498795] [2023-12-02 16:20:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:20,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:20:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 16:20:21,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:20:21,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830498795] [2023-12-02 16:20:21,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830498795] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:21,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578230393] [2023-12-02 16:20:21,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:20:21,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:21,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:21,172 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:20:21,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 16:20:21,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:20:21,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:20:21,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 16:20:21,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 16:20:26,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 16:20:30,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578230393] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:20:30,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [212866131] [2023-12-02 16:20:30,218 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 16:20:30,218 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:20:30,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:20:30,219 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:20:30,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:20:33,157 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 114 for LOIs [2023-12-02 16:20:33,383 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 105 for LOIs [2023-12-02 16:20:33,488 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2023-12-02 16:20:33,489 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-12-02 16:20:33,501 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 1 for LOIs [2023-12-02 16:20:33,522 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:21:07,357 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7423#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_16| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_16| Int) (|v_#memory_int_30| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_116| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_50| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_25| Int) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_16| Int) (|v_#memory_real_128| (Array Int (Array Int Real))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_19| Int) (|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.offset_BEFORE_CALL_15| Int) (|v_#memory_$Pointer$.base_113| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_25| Int) (|v_#memory_int_131| (Array Int (Array Int Int)))) (and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |#memory_int| (store |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26| (store (select |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24 (select (select |#memory_int| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24)))) (<= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_16|) (= |~#s_can_fail_allocator_static~0.offset| 0) (<= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) (= 16 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.offset_BEFORE_CALL_15|) (= (store |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26| (store (select |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24 (select (select |#memory_real| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24))) |#memory_real|) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_25| 18446744073709551616) (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_50| 18446744073709551616)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_16| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_16| 20) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_25| 0) (= (store |v_#memory_real_128| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24) (store (select |v_#memory_real_128| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24)) 0 (select (select |v_#memory_real_27| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24)) 0))) |v_#memory_real_27|) (= ~tl_last_error~0 0) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_116| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24) (store (select |v_#memory_$Pointer$.offset_116| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24)) 0 16)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26| (store (select (store |v_#memory_$Pointer$.offset_116| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24) (store (select |v_#memory_$Pointer$.offset_116| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24)) 0 16)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24 0))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_50|) (= (store |v_#memory_int_131| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24) (store (select |v_#memory_int_131| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24)) 0 (select (select |v_#memory_int_30| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24)) 0))) |v_#memory_int_30|) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_113| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24) (store (select |v_#memory_$Pointer$.base_113| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24)) 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26| (store (select (store |v_#memory_$Pointer$.base_113| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24) (store (select |v_#memory_$Pointer$.base_113| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24)) 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_26|) 24)))) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_19| 20))) (<= |__VERIFIER_assert_#in~cond| 1))' at error location [2023-12-02 16:21:07,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:21:07,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:21:07,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2023-12-02 16:21:07,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045727018] [2023-12-02 16:21:07,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:21:07,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 16:21:07,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:21:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 16:21:07,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2279, Unknown=28, NotChecked=0, Total=2450 [2023-12-02 16:21:07,361 INFO L87 Difference]: Start difference. First operand 138 states and 168 transitions. Second operand has 26 states, 24 states have (on average 2.875) internal successors, (69), 26 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2023-12-02 16:21:09,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:11,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:13,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:16,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:18,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:21:23,114 INFO L93 Difference]: Finished difference Result 214 states and 268 transitions. [2023-12-02 16:21:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 16:21:23,115 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.875) internal successors, (69), 26 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) Word has length 66 [2023-12-02 16:21:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:21:23,116 INFO L225 Difference]: With dead ends: 214 [2023-12-02 16:21:23,116 INFO L226 Difference]: Without dead ends: 165 [2023-12-02 16:21:23,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=410, Invalid=5414, Unknown=28, NotChecked=0, Total=5852 [2023-12-02 16:21:23,119 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 112 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 64 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:21:23,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 551 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1305 Invalid, 5 Unknown, 0 Unchecked, 12.1s Time] [2023-12-02 16:21:23,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-12-02 16:21:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 138. [2023-12-02 16:21:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 90 states have (on average 1.1666666666666667) internal successors, (105), 94 states have internal predecessors, (105), 29 states have call successors, (29), 16 states have call predecessors, (29), 18 states have return successors, (32), 27 states have call predecessors, (32), 27 states have call successors, (32) [2023-12-02 16:21:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2023-12-02 16:21:23,171 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 66 [2023-12-02 16:21:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:21:23,171 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2023-12-02 16:21:23,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.875) internal successors, (69), 26 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2023-12-02 16:21:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2023-12-02 16:21:23,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 16:21:23,173 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:21:23,173 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:21:23,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-02 16:21:23,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 16:21:23,373 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:21:23,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:21:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1634727696, now seen corresponding path program 1 times [2023-12-02 16:21:23,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:21:23,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372838807] [2023-12-02 16:21:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:21:23,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:21:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:21:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 16:21:25,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:21:25,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372838807] [2023-12-02 16:21:25,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372838807] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:21:25,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444947700] [2023-12-02 16:21:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:21:25,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:21:25,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:21:25,374 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:21:25,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 16:21:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:21:25,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 129 conjunts are in the unsatisfiable core [2023-12-02 16:21:25,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:21:25,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 16:21:25,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 16:21:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:21:29,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:21:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 16:21:55,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444947700] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:21:55,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227449235] [2023-12-02 16:21:55,549 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 16:21:55,549 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:21:55,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:21:55,550 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:21:55,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:21:58,703 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 272 for LOIs [2023-12-02 16:21:59,202 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2023-12-02 16:21:59,544 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2023-12-02 16:21:59,548 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-12-02 16:21:59,563 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2023-12-02 16:21:59,599 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:22:52,531 WARN L293 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 278 DAG size of output: 244 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:23:06,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8449#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_47| Int) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| Int) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_73| Int) (|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19| Int)) (or (and (exists ((|v_#memory_$Pointer$.base_127| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_$Pointer$.base_127| 4) 32) 0) (= (select (select |v_#memory_$Pointer$.base_127| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= (select (select |v_#memory_$Pointer$.base_127| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_#memory_$Pointer$.base_127| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= (select (select |v_#memory_$Pointer$.base_127| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_127| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (store (store (store (select |v_#memory_$Pointer$.base_127| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 8 0) 16 0) 0 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 24 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|))))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_26| Int)) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_26| 18446744073709551616) 0)) (<= (+ |#StackHeapBarrier| 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) (exists ((|v_#memory_$Pointer$.offset_132| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_132| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (store (store (store (select |v_#memory_$Pointer$.offset_132| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 8 0) 16 0) 0 16) 24 0))) (= (select (select |v_#memory_$Pointer$.offset_132| 4) 32) 0) (= (select (select |v_#memory_$Pointer$.offset_132| 4) 24) |#funAddr~s_can_fail_calloc_allocator.offset|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_#memory_$Pointer$.offset_132| 4) 16)) (= (select (select |v_#memory_$Pointer$.offset_132| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_#memory_$Pointer$.offset_132| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_113| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_141| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_75| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_144| Int) (|v_ULTIMATE.start_aws_linked_list_end_harness_#t~ret683#1_39| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_75| Int)) (and (= |v_ULTIMATE.start_aws_linked_list_end_harness_#t~ret683#1_39| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_75| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_141|) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_113| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_144| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_75| 16)))) (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_73| |v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_47|) (exists ((|v_#memory_int_30| (Array Int (Array Int Int))) (|v_#memory_int_136| (Array Int (Array Int Int))) (|v_#memory_int_5| (Array Int (Array Int Int))) (|v_#memory_int_137| (Array Int (Array Int Int)))) (and (= |v_#memory_int_137| (store |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 16 (select (select |v_#memory_int_137| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 16)))) (= (store |v_#memory_int_136| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_int_136| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 8 (select (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 8))) |v_#memory_int_5|) (= (select (select |v_#memory_int_136| 1) 0) 48) (= (store |v_#memory_int_137| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_int_137| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 0 (select (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 0))) |v_#memory_int_30|) (= (select (select |v_#memory_int_136| 1) 1) 0) (= (store |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 24 (select (select |#memory_int| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 24))) |#memory_int|))) (exists ((|v_#valid_46| (Array Int Int))) (and (= (select |v_#valid_46| 1) 1) (= (select |v_#valid_46| 4) 1) (= (select |v_#valid_46| 2) 1) (= |#valid| (store |v_#valid_46| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| 1)) (= (select |v_#valid_46| 3) 1) (= (select |v_#valid_46| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 0) (= (select |v_#valid_46| 0) 0))) (= |v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_47| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_73| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) (exists ((|v_#length_40| (Array Int Int))) (and (= 30 (select |v_#length_40| 2)) (= 40 (select |v_#length_40| 4)) (= (store |v_#length_40| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| 32) |#length|) (= (select |v_#length_40| 1) 2) (= (select |v_#length_40| 3) 12))) (exists ((|v_#memory_real_4| (Array Int (Array Int Real))) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_#memory_real_133| (Array Int (Array Int Real))) (|v_#memory_real_134| (Array Int (Array Int Real)))) (and (= |#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 24 (select (select |#memory_real| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 24)))) (= (store |v_#memory_real_133| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_real_133| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 8 (select (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 8))) |v_#memory_real_4|) (= |v_#memory_real_27| (store |v_#memory_real_134| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_real_134| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 0 (select (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 0)))) (= |v_#memory_real_134| (store |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 16 (select (select |v_#memory_real_134| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 16)))))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_77| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_115| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_143| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_146| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_77| Int) (|v_ULTIMATE.start_aws_linked_list_end_#t~ret332#1_41| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_146| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_77| 16)) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_115| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_77| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_143|) (= |v_ULTIMATE.start_aws_linked_list_end_#t~ret332#1_41| 1))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_113| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_113| 0) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_#t~ret324#1_143| Int)) (= (mod |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_#t~ret324#1_143| 256) 0))))) (and (exists ((|v_#memory_$Pointer$.base_127| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_$Pointer$.base_127| 4) 32) 0) (= (select (select |v_#memory_$Pointer$.base_127| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= (select (select |v_#memory_$Pointer$.base_127| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_#memory_$Pointer$.base_127| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= (select (select |v_#memory_$Pointer$.base_127| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_127| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (store (store (store (select |v_#memory_$Pointer$.base_127| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 8 0) 16 0) 0 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 24 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|))))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_26| Int)) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_26| 18446744073709551616) 0)) (<= (+ |#StackHeapBarrier| 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) (exists ((|v_#memory_$Pointer$.offset_132| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_132| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (store (store (store (select |v_#memory_$Pointer$.offset_132| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 8 0) 16 0) 0 16) 24 0))) (= (select (select |v_#memory_$Pointer$.offset_132| 4) 32) 0) (= (select (select |v_#memory_$Pointer$.offset_132| 4) 24) |#funAddr~s_can_fail_calloc_allocator.offset|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_#memory_$Pointer$.offset_132| 4) 16)) (= (select (select |v_#memory_$Pointer$.offset_132| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_#memory_$Pointer$.offset_132| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_113| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_141| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_75| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_144| Int) (|v_ULTIMATE.start_aws_linked_list_end_harness_#t~ret683#1_39| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_75| Int)) (and (= |v_ULTIMATE.start_aws_linked_list_end_harness_#t~ret683#1_39| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_75| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_141|) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_113| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_144| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_75| 16)))) (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_73| |v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_47|) (exists ((|v_#memory_int_30| (Array Int (Array Int Int))) (|v_#memory_int_136| (Array Int (Array Int Int))) (|v_#memory_int_5| (Array Int (Array Int Int))) (|v_#memory_int_137| (Array Int (Array Int Int)))) (and (= |v_#memory_int_137| (store |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 16 (select (select |v_#memory_int_137| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 16)))) (= (store |v_#memory_int_136| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_int_136| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 8 (select (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 8))) |v_#memory_int_5|) (= (select (select |v_#memory_int_136| 1) 0) 48) (= (store |v_#memory_int_137| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_int_137| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 0 (select (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 0))) |v_#memory_int_30|) (= (select (select |v_#memory_int_136| 1) 1) 0) (= (store |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 24 (select (select |#memory_int| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 24))) |#memory_int|))) (exists ((|v_#valid_46| (Array Int Int))) (and (= (select |v_#valid_46| 1) 1) (= (select |v_#valid_46| 4) 1) (= (select |v_#valid_46| 2) 1) (= |#valid| (store |v_#valid_46| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| 1)) (= (select |v_#valid_46| 3) 1) (= (select |v_#valid_46| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 0) (= (select |v_#valid_46| 0) 0))) (= |v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_47| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_73| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_114| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_142| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_76| Int) (|v_ULTIMATE.start_aws_linked_list_end_#t~ret332#1_41| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_145| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_76| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_76| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_142|) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_145| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_76| 16)) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_114| 1) (= |v_ULTIMATE.start_aws_linked_list_end_#t~ret332#1_41| 1))) (exists ((|v_#length_40| (Array Int Int))) (and (= 30 (select |v_#length_40| 2)) (= 40 (select |v_#length_40| 4)) (= (store |v_#length_40| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| 32) |#length|) (= (select |v_#length_40| 1) 2) (= (select |v_#length_40| 3) 12))) (exists ((|v_#memory_real_4| (Array Int (Array Int Real))) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_#memory_real_133| (Array Int (Array Int Real))) (|v_#memory_real_134| (Array Int (Array Int Real)))) (and (= |#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 24 (select (select |#memory_real| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 24)))) (= (store |v_#memory_real_133| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_real_133| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 8 (select (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 8))) |v_#memory_real_4|) (= |v_#memory_real_27| (store |v_#memory_real_134| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_real_134| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 0 (select (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 0)))) (= |v_#memory_real_134| (store |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173| (store (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 16 (select (select |v_#memory_real_134| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_173|) 16)))))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_113| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_113| 0) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_#t~ret324#1_143| Int)) (= (mod |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_#t~ret324#1_143| 256) 0))))))) (= ~tl_last_error~0 0))' at error location [2023-12-02 16:23:06,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:23:06,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:23:06,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 30, 15] total 56 [2023-12-02 16:23:06,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604969866] [2023-12-02 16:23:06,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:23:06,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-02 16:23:06,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:23:06,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-02 16:23:06,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=6210, Unknown=13, NotChecked=0, Total=6642 [2023-12-02 16:23:06,094 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 56 states, 46 states have (on average 2.282608695652174) internal successors, (105), 47 states have internal predecessors, (105), 19 states have call successors, (30), 4 states have call predecessors, (30), 15 states have return successors, (29), 17 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-02 16:23:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:23:23,765 INFO L93 Difference]: Finished difference Result 248 states and 308 transitions. [2023-12-02 16:23:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-02 16:23:23,766 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 46 states have (on average 2.282608695652174) internal successors, (105), 47 states have internal predecessors, (105), 19 states have call successors, (30), 4 states have call predecessors, (30), 15 states have return successors, (29), 17 states have call predecessors, (29), 18 states have call successors, (29) Word has length 67 [2023-12-02 16:23:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:23:23,767 INFO L225 Difference]: With dead ends: 248 [2023-12-02 16:23:23,768 INFO L226 Difference]: Without dead ends: 177 [2023-12-02 16:23:23,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 138 SyntacticMatches, 8 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3791 ImplicationChecksByTransitivity, 91.1s TimeCoverageRelationStatistics Valid=893, Invalid=11084, Unknown=13, NotChecked=0, Total=11990 [2023-12-02 16:23:23,774 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 275 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:23:23,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 824 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1698 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-12-02 16:23:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-12-02 16:23:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 144. [2023-12-02 16:23:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 99 states have internal predecessors, (109), 30 states have call successors, (30), 16 states have call predecessors, (30), 18 states have return successors, (33), 28 states have call predecessors, (33), 28 states have call successors, (33) [2023-12-02 16:23:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2023-12-02 16:23:23,847 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 67 [2023-12-02 16:23:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:23:23,847 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2023-12-02 16:23:23,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 46 states have (on average 2.282608695652174) internal successors, (105), 47 states have internal predecessors, (105), 19 states have call successors, (30), 4 states have call predecessors, (30), 15 states have return successors, (29), 17 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-02 16:23:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2023-12-02 16:23:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 16:23:23,849 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:23:23,849 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:23:23,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 16:23:24,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 16:23:24,050 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:23:24,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:23:24,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1096517875, now seen corresponding path program 1 times [2023-12-02 16:23:24,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:23:24,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402912891] [2023-12-02 16:23:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:23:24,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:23:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:23:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-02 16:23:24,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:23:24,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402912891] [2023-12-02 16:23:24,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402912891] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:23:24,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:23:24,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:23:24,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065925845] [2023-12-02 16:23:24,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:23:24,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:23:24,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:23:24,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:23:24,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:23:24,623 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-12-02 16:23:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:23:25,549 INFO L93 Difference]: Finished difference Result 158 states and 187 transitions. [2023-12-02 16:23:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:23:25,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2023-12-02 16:23:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:23:25,551 INFO L225 Difference]: With dead ends: 158 [2023-12-02 16:23:25,551 INFO L226 Difference]: Without dead ends: 156 [2023-12-02 16:23:25,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 16:23:25,552 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:23:25,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 322 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:23:25,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-12-02 16:23:25,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2023-12-02 16:23:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 105 states have internal predecessors, (115), 32 states have call successors, (32), 18 states have call predecessors, (32), 20 states have return successors, (35), 30 states have call predecessors, (35), 30 states have call successors, (35) [2023-12-02 16:23:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 182 transitions. [2023-12-02 16:23:25,616 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 182 transitions. Word has length 70 [2023-12-02 16:23:25,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:23:25,617 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 182 transitions. [2023-12-02 16:23:25,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-12-02 16:23:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 182 transitions. [2023-12-02 16:23:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 16:23:25,618 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:23:25,618 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:23:25,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 16:23:25,618 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:23:25,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:23:25,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1553041711, now seen corresponding path program 2 times [2023-12-02 16:23:25,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:23:25,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907084980] [2023-12-02 16:23:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:23:25,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:23:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:23:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 16:23:27,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:23:27,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907084980] [2023-12-02 16:23:27,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907084980] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:23:27,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448139644] [2023-12-02 16:23:27,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:23:27,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:23:27,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:23:27,604 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:23:27,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 16:23:27,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:23:27,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:23:27,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-02 16:23:27,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:23:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 16:23:45,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:23:48,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:23:48,420 INFO L378 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 26 treesize of output 29 [2023-12-02 16:23:48,484 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:23:48,484 INFO L378 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 24 treesize of output 27 [2023-12-02 16:23:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 16:23:48,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448139644] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:23:48,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376622382] [2023-12-02 16:23:48,904 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 16:23:48,904 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:23:48,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:23:48,904 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:23:48,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:23:52,021 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 280 for LOIs [2023-12-02 16:23:52,614 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2023-12-02 16:23:52,978 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2023-12-02 16:23:52,984 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-12-02 16:23:53,001 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2023-12-02 16:23:53,038 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:24:45,225 WARN L293 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 280 DAG size of output: 239 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:24:51,918 WARN L293 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 282 DAG size of output: 248 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:24:51,920 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10006#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_88| Int) (|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_23| Int) (|v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_57| Int) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| Int)) (or (and (exists ((|v_#valid_47| (Array Int Int))) (and (= (select |v_#valid_47| 2) 1) (= (store |v_#valid_47| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| 1) |#valid|) (= (select |v_#valid_47| 3) 1) (= (select |v_#valid_47| 1) 1) (= (select |v_#valid_47| 0) 0) (= (select |v_#valid_47| 4) 1) (= (select |v_#valid_47| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 0))) (exists ((|v_#memory_int_30| (Array Int (Array Int Int))) (|v_#memory_int_5| (Array Int (Array Int Int))) (|v_#memory_int_144| (Array Int (Array Int Int))) (|v_#memory_int_145| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_144| 1) 1) 0) (= |v_#memory_int_5| (store |v_#memory_int_144| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_int_144| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 8 (select (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 8)))) (= |#memory_int| (store |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 24 (select (select |#memory_int| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 24)))) (= (store |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 16 (select (select |v_#memory_int_145| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 16))) |v_#memory_int_145|) (= (select (select |v_#memory_int_144| 1) 0) 48) (= (store |v_#memory_int_145| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_int_145| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 0 (select (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 0))) |v_#memory_int_30|))) (exists ((|v_#length_41| (Array Int Int))) (and (= 2 (select |v_#length_41| 1)) (= 30 (select |v_#length_41| 2)) (= 40 (select |v_#length_41| 4)) (= (select |v_#length_41| 3) 12) (= |#length| (store |v_#length_41| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| 32)))) (exists ((|v_#memory_real_4| (Array Int (Array Int Real))) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_#memory_real_141| (Array Int (Array Int Real))) (|v_#memory_real_142| (Array Int (Array Int Real)))) (and (= |#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 24 (select (select |#memory_real| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 24)))) (= |v_#memory_real_27| (store |v_#memory_real_142| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_real_142| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 0 (select (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 0)))) (= (store |v_#memory_real_141| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_real_141| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 8 (select (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 8))) |v_#memory_real_4|) (= (store |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 16 (select (select |v_#memory_real_142| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 16))) |v_#memory_real_142|))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_27| Int)) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_27| 18446744073709551616) 0)) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_145| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_184| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_97| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_187| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_97| Int) (|v_ULTIMATE.start_aws_linked_list_end_#t~ret332#1_45| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_145| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_97| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_184|) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_187| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_97| 16)) (= |v_ULTIMATE.start_aws_linked_list_end_#t~ret332#1_45| 1))) (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_88| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_23|) (exists ((|v_#memory_$Pointer$.offset_138| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_$Pointer$.offset_138| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_138| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (store (store (store (select |v_#memory_$Pointer$.offset_138| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 8 0) 16 0) 0 16) 24 0))) (= (select (select |v_#memory_$Pointer$.offset_138| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_#memory_$Pointer$.offset_138| 4) 24)) (= (select (select |v_#memory_$Pointer$.offset_138| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_#memory_$Pointer$.offset_138| 4) 32) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_143| Int)) (and (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_#t~ret324#1_181| Int)) (= (mod |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_#t~ret324#1_181| 256) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_143| 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_182| Int) (|v_ULTIMATE.start_aws_linked_list_end_harness_#t~ret683#1_41| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_143| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_95| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_95| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_185| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_185| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_95| 16)) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_143| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_95| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_182|) (= |v_ULTIMATE.start_aws_linked_list_end_harness_#t~ret683#1_41| 1))) (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_88| |v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_57|) (exists ((|v_#memory_$Pointer$.base_133| (Array Int (Array Int Int)))) (and (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_#memory_$Pointer$.base_133| 4) 0)) (= (select (select |v_#memory_$Pointer$.base_133| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_#memory_$Pointer$.base_133| 4) 24)) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_133| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (store (store (store (select |v_#memory_$Pointer$.base_133| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 8 0) 16 0) 0 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 24 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|))) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_#memory_$Pointer$.base_133| 4) 16)) (= (select (select |v_#memory_$Pointer$.base_133| 4) 8) |#funAddr~s_can_fail_free_allocator.base|))) (= |v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_57| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) (<= (+ |#StackHeapBarrier| 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|)) (and (exists ((|v_#valid_47| (Array Int Int))) (and (= (select |v_#valid_47| 2) 1) (= (store |v_#valid_47| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| 1) |#valid|) (= (select |v_#valid_47| 3) 1) (= (select |v_#valid_47| 1) 1) (= (select |v_#valid_47| 0) 0) (= (select |v_#valid_47| 4) 1) (= (select |v_#valid_47| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 0))) (exists ((|v_#memory_int_30| (Array Int (Array Int Int))) (|v_#memory_int_5| (Array Int (Array Int Int))) (|v_#memory_int_144| (Array Int (Array Int Int))) (|v_#memory_int_145| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_144| 1) 1) 0) (= |v_#memory_int_5| (store |v_#memory_int_144| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_int_144| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 8 (select (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 8)))) (= |#memory_int| (store |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 24 (select (select |#memory_int| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 24)))) (= (store |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 16 (select (select |v_#memory_int_145| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 16))) |v_#memory_int_145|) (= (select (select |v_#memory_int_144| 1) 0) 48) (= (store |v_#memory_int_145| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_int_145| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 0 (select (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 0))) |v_#memory_int_30|))) (exists ((|v_#length_41| (Array Int Int))) (and (= 2 (select |v_#length_41| 1)) (= 30 (select |v_#length_41| 2)) (= 40 (select |v_#length_41| 4)) (= (select |v_#length_41| 3) 12) (= |#length| (store |v_#length_41| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| 32)))) (exists ((|v_#memory_real_4| (Array Int (Array Int Real))) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_#memory_real_141| (Array Int (Array Int Real))) (|v_#memory_real_142| (Array Int (Array Int Real)))) (and (= |#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 24 (select (select |#memory_real| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 24)))) (= |v_#memory_real_27| (store |v_#memory_real_142| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_real_142| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 0 (select (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 0)))) (= (store |v_#memory_real_141| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_real_141| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 8 (select (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 8))) |v_#memory_real_4|) (= (store |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 16 (select (select |v_#memory_real_142| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 16))) |v_#memory_real_142|))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_27| Int)) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_27| 18446744073709551616) 0)) (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_88| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_23|) (exists ((|v_#memory_$Pointer$.offset_138| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_$Pointer$.offset_138| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_138| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (store (store (store (select |v_#memory_$Pointer$.offset_138| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 8 0) 16 0) 0 16) 24 0))) (= (select (select |v_#memory_$Pointer$.offset_138| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_#memory_$Pointer$.offset_138| 4) 24)) (= (select (select |v_#memory_$Pointer$.offset_138| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_#memory_$Pointer$.offset_138| 4) 32) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_183| Int) (|v_ULTIMATE.start_aws_linked_list_end_harness_#t~ret683#1_41| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_144| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_96| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_186| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_96| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_186| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_96| 16)) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_96| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_183|) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_144| 1) (= |v_ULTIMATE.start_aws_linked_list_end_harness_#t~ret683#1_41| 1))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_143| Int)) (and (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_#t~ret324#1_181| Int)) (= (mod |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_#t~ret324#1_181| 256) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_143| 0))) (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_88| |v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_57|) (exists ((|v_#memory_$Pointer$.base_133| (Array Int (Array Int Int)))) (and (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_#memory_$Pointer$.base_133| 4) 0)) (= (select (select |v_#memory_$Pointer$.base_133| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_#memory_$Pointer$.base_133| 4) 24)) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_133| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195| (store (store (store (store (select |v_#memory_$Pointer$.base_133| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 8 0) 16 0) 0 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) 24 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|))) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_#memory_$Pointer$.base_133| 4) 16)) (= (select (select |v_#memory_$Pointer$.base_133| 4) 8) |#funAddr~s_can_fail_free_allocator.base|))) (= |v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_57| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) (<= (+ |#StackHeapBarrier| 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_195|) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_182| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_143| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_95| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_95| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_185| Int) (|v_ULTIMATE.start_aws_linked_list_end_#t~ret332#1_45| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_185| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_95| 16)) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_143| 1) (= |v_ULTIMATE.start_aws_linked_list_end_#t~ret332#1_45| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_95| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_182|)))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0))' at error location [2023-12-02 16:24:51,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:24:51,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:24:51,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 13] total 32 [2023-12-02 16:24:51,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319101226] [2023-12-02 16:24:51,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:24:51,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 16:24:51,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:24:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 16:24:51,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2977, Unknown=15, NotChecked=0, Total=3306 [2023-12-02 16:24:51,924 INFO L87 Difference]: Start difference. First operand 154 states and 182 transitions. Second operand has 32 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 31 states have internal predecessors, (86), 15 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (29), 14 states have call predecessors, (29), 14 states have call successors, (29) [2023-12-02 16:24:55,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:24:58,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:00,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:02,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:04,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:09,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:13,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:17,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:21,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:26,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:28,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:30,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:32,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:34,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:36,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:40,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:42,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:44,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:46,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:48,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:50,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:52,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:54,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:25:59,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:01,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:03,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:05,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:07,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:09,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:11,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:13,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:15,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:17,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:19,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:21,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:23,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:25,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:27,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:29,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:31,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:33,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:36,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:38,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:40,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:42,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:44,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:46,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:48,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:50,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:52,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:54,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:56,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:26:58,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:02,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:04,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:06,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:08,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:10,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:14,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:19,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:21,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:23,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:25,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:27,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:31,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:33,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:42,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:44,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:46,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:48,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:27:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:27:48,985 INFO L93 Difference]: Finished difference Result 307 states and 378 transitions. [2023-12-02 16:27:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 16:27:48,986 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 31 states have internal predecessors, (86), 15 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (29), 14 states have call predecessors, (29), 14 states have call successors, (29) Word has length 73 [2023-12-02 16:27:48,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:27:48,987 INFO L225 Difference]: With dead ends: 307 [2023-12-02 16:27:48,988 INFO L226 Difference]: Without dead ends: 260 [2023-12-02 16:27:48,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 178 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 109.1s TimeCoverageRelationStatistics Valid=714, Invalid=6229, Unknown=29, NotChecked=0, Total=6972 [2023-12-02 16:27:48,990 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 200 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 98 mSolverCounterUnsat, 70 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 70 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:27:48,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 760 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 987 Invalid, 70 Unknown, 0 Unchecked, 145.0s Time] [2023-12-02 16:27:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-12-02 16:27:49,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2023-12-02 16:27:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 154 states have (on average 1.1363636363636365) internal successors, (175), 159 states have internal predecessors, (175), 52 states have call successors, (52), 26 states have call predecessors, (52), 29 states have return successors, (58), 50 states have call predecessors, (58), 48 states have call successors, (58) [2023-12-02 16:27:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2023-12-02 16:27:49,111 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 73 [2023-12-02 16:27:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:27:49,112 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2023-12-02 16:27:49,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 31 states have internal predecessors, (86), 15 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (29), 14 states have call predecessors, (29), 14 states have call successors, (29) [2023-12-02 16:27:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2023-12-02 16:27:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 16:27:49,113 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:27:49,113 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:27:49,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 16:27:49,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:27:49,314 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:27:49,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:27:49,314 INFO L85 PathProgramCache]: Analyzing trace with hash -744979180, now seen corresponding path program 1 times [2023-12-02 16:27:49,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:27:49,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346852897] [2023-12-02 16:27:49,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:27:49,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:27:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:27:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-02 16:27:49,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:27:49,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346852897] [2023-12-02 16:27:49,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346852897] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:27:49,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:27:49,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:27:49,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899553836] [2023-12-02 16:27:49,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:27:49,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:27:49,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:27:49,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:27:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:27:49,769 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 16:27:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:27:50,293 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2023-12-02 16:27:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:27:50,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2023-12-02 16:27:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:27:50,296 INFO L225 Difference]: With dead ends: 250 [2023-12-02 16:27:50,296 INFO L226 Difference]: Without dead ends: 248 [2023-12-02 16:27:50,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:27:50,297 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 5 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:27:50,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 169 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:27:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-12-02 16:27:50,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2023-12-02 16:27:50,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 163 states have (on average 1.1288343558282208) internal successors, (184), 168 states have internal predecessors, (184), 52 states have call successors, (52), 29 states have call predecessors, (52), 32 states have return successors, (58), 50 states have call predecessors, (58), 48 states have call successors, (58) [2023-12-02 16:27:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 294 transitions. [2023-12-02 16:27:50,400 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 294 transitions. Word has length 76 [2023-12-02 16:27:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:27:50,401 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 294 transitions. [2023-12-02 16:27:50,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 16:27:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 294 transitions. [2023-12-02 16:27:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 16:27:50,402 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:27:50,402 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:27:50,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 16:27:50,403 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:27:50,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:27:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1188807401, now seen corresponding path program 1 times [2023-12-02 16:27:50,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:27:50,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100753875] [2023-12-02 16:27:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:27:50,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:27:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:27:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-12-02 16:27:51,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:27:51,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100753875] [2023-12-02 16:27:51,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100753875] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:27:51,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:27:51,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 16:27:51,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172034981] [2023-12-02 16:27:51,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:27:51,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:27:51,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:27:51,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:27:51,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:27:51,656 INFO L87 Difference]: Start difference. First operand 248 states and 294 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 16:27:52,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:27:52,461 INFO L93 Difference]: Finished difference Result 262 states and 307 transitions. [2023-12-02 16:27:52,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:27:52,462 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 82 [2023-12-02 16:27:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:27:52,463 INFO L225 Difference]: With dead ends: 262 [2023-12-02 16:27:52,463 INFO L226 Difference]: Without dead ends: 258 [2023-12-02 16:27:52,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-12-02 16:27:52,464 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:27:52,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 219 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:27:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-02 16:27:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2023-12-02 16:27:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 169 states have (on average 1.1183431952662721) internal successors, (189), 174 states have internal predecessors, (189), 51 states have call successors, (51), 31 states have call predecessors, (51), 34 states have return successors, (58), 49 states have call predecessors, (58), 48 states have call successors, (58) [2023-12-02 16:27:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 298 transitions. [2023-12-02 16:27:52,566 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 298 transitions. Word has length 82 [2023-12-02 16:27:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:27:52,567 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 298 transitions. [2023-12-02 16:27:52,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 16:27:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 298 transitions. [2023-12-02 16:27:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 16:27:52,568 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:27:52,568 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:27:52,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 16:27:52,568 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:27:52,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:27:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1594666131, now seen corresponding path program 3 times [2023-12-02 16:27:52,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:27:52,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225916156] [2023-12-02 16:27:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:27:52,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:27:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:27:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 20 proven. 67 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 16:27:56,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:27:56,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225916156] [2023-12-02 16:27:56,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225916156] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:27:56,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023813971] [2023-12-02 16:27:56,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:27:56,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:27:56,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:27:56,279 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:27:56,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 16:27:56,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:27:56,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:27:56,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 88 conjunts are in the unsatisfiable core [2023-12-02 16:27:56,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:27:56,882 INFO L378 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 14 treesize of output 15 [2023-12-02 16:27:56,910 INFO L378 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 7 [2023-12-02 16:28:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 93 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 16:28:01,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:28:04,868 INFO L349 Elim1Store]: treesize reduction 17, result has 63.0 percent of original size [2023-12-02 16:28:04,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 98 [2023-12-02 16:28:04,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:28:04,974 INFO L378 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 98 treesize of output 114 [2023-12-02 16:28:04,992 INFO L378 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 33 treesize of output 31 [2023-12-02 16:28:05,177 INFO L378 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 6 [2023-12-02 16:28:05,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:28:05,286 INFO L378 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 21 treesize of output 25 [2023-12-02 16:28:05,349 INFO L378 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 5 [2023-12-02 16:28:05,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:28:05,462 INFO L378 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 89 treesize of output 89 [2023-12-02 16:28:05,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:28:05,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2023-12-02 16:28:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-02 16:28:06,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023813971] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:28:06,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433571277] [2023-12-02 16:28:06,258 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 16:28:06,258 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:28:06,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:28:06,259 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:28:06,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:28:09,313 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 272 for LOIs [2023-12-02 16:28:09,867 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2023-12-02 16:28:10,240 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2023-12-02 16:28:10,244 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-12-02 16:28:10,261 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2023-12-02 16:28:10,298 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:29:00,420 WARN L293 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 278 DAG size of output: 251 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:29:13,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12839#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| Int) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_100| Int) (|v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_27| Int)) (or (and (exists ((|v_#memory_real_4| (Array Int (Array Int Real))) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_#memory_real_153| (Array Int (Array Int Real))) (|v_#memory_real_154| (Array Int (Array Int Real)))) (and (= |v_#memory_real_154| (store |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 16 (select (select |v_#memory_real_154| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 16)))) (= (store |v_#memory_real_153| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_real_153| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 8 (select (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 8))) |v_#memory_real_4|) (= (store |v_#memory_real_154| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_real_154| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 0 (select (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 0))) |v_#memory_real_27|) (= |#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 24 (select (select |#memory_real| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 24)))))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_113| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_113| Int) (|v_ULTIMATE.start_aws_linked_list_end_#t~ret332#1_50| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_170| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_220| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_226| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_170| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_113| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_226|) (= |v_ULTIMATE.start_aws_linked_list_end_#t~ret332#1_50| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_220| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_113| 16)))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_#t~ret683#1_45| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_114| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_114| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_171| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_221| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_227| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_171| 1) (= |v_ULTIMATE.start_aws_linked_list_end_harness_#t~ret683#1_45| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_114| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_227|) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_221| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_114| 16)))) (exists ((|v_#memory_int_30| (Array Int (Array Int Int))) (|v_#memory_int_5| (Array Int (Array Int Int))) (|v_#memory_int_156| (Array Int (Array Int Int))) (|v_#memory_int_157| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_156| 1) 1) 0) (= (store |v_#memory_int_156| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_int_156| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 8 (select (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 8))) |v_#memory_int_5|) (= (select (select |v_#memory_int_156| 1) 0) 48) (= |v_#memory_int_30| (store |v_#memory_int_157| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_int_157| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 0 (select (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 0)))) (= (store |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 16 (select (select |v_#memory_int_157| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 16))) |v_#memory_int_157|) (= |#memory_int| (store |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 24 (select (select |#memory_int| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 24)))))) (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_27| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_100|) (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_100| |v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_67|) (exists ((|v_#memory_$Pointer$.offset_145| (Array Int (Array Int Int)))) (and (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_#memory_$Pointer$.offset_145| 4) 24)) (= (select (select |v_#memory_$Pointer$.offset_145| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= (select (select |v_#memory_$Pointer$.offset_145| 4) 32) 0) (= (select (select |v_#memory_$Pointer$.offset_145| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_145| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (store (store (store (select |v_#memory_$Pointer$.offset_145| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 8 0) 16 0) 0 16) 24 0))) (= (select (select |v_#memory_$Pointer$.offset_145| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_29| Int)) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_29| 18446744073709551616) 0)) (exists ((|v_#length_42| (Array Int Int))) (and (= 40 (select |v_#length_42| 4)) (= (select |v_#length_42| 3) 12) (= (select |v_#length_42| 1) 2) (= (store |v_#length_42| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| 32) |#length|) (= 30 (select |v_#length_42| 2)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_170| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_170| 0) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_#t~ret324#1_222| Int)) (= (mod |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_#t~ret324#1_222| 256) 0)))) (exists ((|v_#valid_48| (Array Int Int))) (and (= (select |v_#valid_48| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 0) (= |#valid| (store |v_#valid_48| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| 1)) (= (select |v_#valid_48| 3) 1) (= (select |v_#valid_48| 0) 0) (= (select |v_#valid_48| 4) 1) (= (select |v_#valid_48| 2) 1) (= (select |v_#valid_48| 1) 1))) (<= (+ |#StackHeapBarrier| 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) (= |v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_67| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) (exists ((|v_#memory_$Pointer$.base_141| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_$Pointer$.base_141| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_#memory_$Pointer$.base_141| 4) 0)) (= (select (select |v_#memory_$Pointer$.base_141| 4) 32) 0) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_#memory_$Pointer$.base_141| 4) 16)) (= (select (select |v_#memory_$Pointer$.base_141| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (store (store (store (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 8 0) 16 0) 0 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 24 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|)))))) (and (exists ((|v_#memory_real_4| (Array Int (Array Int Real))) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_#memory_real_153| (Array Int (Array Int Real))) (|v_#memory_real_154| (Array Int (Array Int Real)))) (and (= |v_#memory_real_154| (store |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 16 (select (select |v_#memory_real_154| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 16)))) (= (store |v_#memory_real_153| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_real_153| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 8 (select (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 8))) |v_#memory_real_4|) (= (store |v_#memory_real_154| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_real_154| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 0 (select (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 0))) |v_#memory_real_27|) (= |#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 24 (select (select |#memory_real| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 24)))))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_113| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_113| Int) (|v_ULTIMATE.start_aws_linked_list_end_#t~ret332#1_50| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_170| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_220| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_226| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_170| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_113| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_226|) (= |v_ULTIMATE.start_aws_linked_list_end_#t~ret332#1_50| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_220| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_113| 16)))) (exists ((|v_#memory_int_30| (Array Int (Array Int Int))) (|v_#memory_int_5| (Array Int (Array Int Int))) (|v_#memory_int_156| (Array Int (Array Int Int))) (|v_#memory_int_157| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_156| 1) 1) 0) (= (store |v_#memory_int_156| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_int_156| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 8 (select (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 8))) |v_#memory_int_5|) (= (select (select |v_#memory_int_156| 1) 0) 48) (= |v_#memory_int_30| (store |v_#memory_int_157| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_int_157| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 0 (select (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 0)))) (= (store |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 16 (select (select |v_#memory_int_157| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 16))) |v_#memory_int_157|) (= |#memory_int| (store |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 24 (select (select |#memory_int| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 24)))))) (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_27| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_100|) (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_100| |v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_67|) (exists ((|v_#memory_$Pointer$.offset_145| (Array Int (Array Int Int)))) (and (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_#memory_$Pointer$.offset_145| 4) 24)) (= (select (select |v_#memory_$Pointer$.offset_145| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= (select (select |v_#memory_$Pointer$.offset_145| 4) 32) 0) (= (select (select |v_#memory_$Pointer$.offset_145| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_145| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (store (store (store (select |v_#memory_$Pointer$.offset_145| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 8 0) 16 0) 0 16) 24 0))) (= (select (select |v_#memory_$Pointer$.offset_145| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_29| Int)) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_29| 18446744073709551616) 0)) (exists ((|v_#length_42| (Array Int Int))) (and (= 40 (select |v_#length_42| 4)) (= (select |v_#length_42| 3) 12) (= (select |v_#length_42| 1) 2) (= (store |v_#length_42| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| 32) |#length|) (= 30 (select |v_#length_42| 2)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_170| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_170| 0) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_#t~ret324#1_222| Int)) (= (mod |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_#t~ret324#1_222| 256) 0)))) (exists ((|v_#valid_48| (Array Int Int))) (and (= (select |v_#valid_48| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 0) (= |#valid| (store |v_#valid_48| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| 1)) (= (select |v_#valid_48| 3) 1) (= (select |v_#valid_48| 0) 0) (= (select |v_#valid_48| 4) 1) (= (select |v_#valid_48| 2) 1) (= (select |v_#valid_48| 1) 1))) (<= (+ |#StackHeapBarrier| 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) (= |v_ULTIMATE.start_aws_linked_list_end_#in~list#1.base_BEFORE_CALL_67| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) (exists ((|v_#memory_$Pointer$.base_141| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_$Pointer$.base_141| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_#memory_$Pointer$.base_141| 4) 0)) (= (select (select |v_#memory_$Pointer$.base_141| 4) 32) 0) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_#memory_$Pointer$.base_141| 4) 16)) (= (select (select |v_#memory_$Pointer$.base_141| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225| (store (store (store (store (select |v_#memory_$Pointer$.base_141| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 8 0) 16 0) 0 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|) 24 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_225|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_#t~ret683#1_45| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_228| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_115| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_115| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_172| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_222| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~head_reaches_tail~0#1_172| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_115| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_228|) (= |v_ULTIMATE.start_aws_linked_list_end_harness_#t~ret683#1_45| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_222| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_115| 16))))))) (= ~tl_last_error~0 0))' at error location [2023-12-02 16:29:13,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:29:13,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:29:13,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 36 [2023-12-02 16:29:13,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654092522] [2023-12-02 16:29:13,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:29:13,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 16:29:13,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:29:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 16:29:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=3470, Unknown=9, NotChecked=0, Total=3782 [2023-12-02 16:29:13,802 INFO L87 Difference]: Start difference. First operand 255 states and 298 transitions. Second operand has 36 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 35 states have internal predecessors, (104), 19 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (29), 15 states have call predecessors, (29), 19 states have call successors, (29) [2023-12-02 16:29:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:29:24,935 INFO L93 Difference]: Finished difference Result 324 states and 374 transitions. [2023-12-02 16:29:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 16:29:24,936 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 35 states have internal predecessors, (104), 19 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (29), 15 states have call predecessors, (29), 19 states have call successors, (29) Word has length 85 [2023-12-02 16:29:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:29:24,937 INFO L225 Difference]: With dead ends: 324 [2023-12-02 16:29:24,937 INFO L226 Difference]: Without dead ends: 185 [2023-12-02 16:29:24,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 206 SyntacticMatches, 13 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=597, Invalid=6036, Unknown=9, NotChecked=0, Total=6642 [2023-12-02 16:29:24,939 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 167 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:29:24,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 882 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-12-02 16:29:24,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-02 16:29:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 160. [2023-12-02 16:29:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.0841121495327102) internal successors, (116), 109 states have internal predecessors, (116), 30 states have call successors, (30), 22 states have call predecessors, (30), 22 states have return successors, (31), 28 states have call predecessors, (31), 28 states have call successors, (31) [2023-12-02 16:29:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 177 transitions. [2023-12-02 16:29:25,009 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 177 transitions. Word has length 85 [2023-12-02 16:29:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:29:25,009 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 177 transitions. [2023-12-02 16:29:25,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 35 states have internal predecessors, (104), 19 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (29), 15 states have call predecessors, (29), 19 states have call successors, (29) [2023-12-02 16:29:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 177 transitions. [2023-12-02 16:29:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 16:29:25,010 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:29:25,010 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:29:25,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 16:29:25,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:29:25,211 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:29:25,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:29:25,211 INFO L85 PathProgramCache]: Analyzing trace with hash -306376730, now seen corresponding path program 1 times [2023-12-02 16:29:25,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:29:25,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099447819] [2023-12-02 16:29:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:29:25,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:29:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:29:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 7 proven. 99 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 16:29:33,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:29:33,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099447819] [2023-12-02 16:29:33,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099447819] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:29:33,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956624584] [2023-12-02 16:29:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:29:33,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:29:33,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:29:33,683 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:29:33,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee6680d-334e-43d4-b7bd-6520ecd44fb3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 16:29:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:29:33,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 139 conjunts are in the unsatisfiable core [2023-12-02 16:29:33,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:29:34,296 INFO L378 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 16 treesize of output 16 [2023-12-02 16:29:34,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:29:34,314 INFO L378 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 16 treesize of output 11 [2023-12-02 16:29:34,345 INFO L378 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 16 treesize of output 16 [2023-12-02 16:29:34,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:29:34,362 INFO L378 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 16 treesize of output 11 [2023-12-02 16:29:34,745 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 16:29:34,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 69 [2023-12-02 16:29:34,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:29:34,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 18 [2023-12-02 16:29:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 52 proven. 69 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 16:29:57,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:30:23,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:30:23,551 INFO L378 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 1357 treesize of output 1142 [2023-12-02 16:30:23,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:30:23,586 INFO L378 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 1437 treesize of output 1174 [2023-12-02 16:30:34,626 WARN L293 SmtUtils]: Spent 10.96s on a formula simplification. DAG size of input: 654 DAG size of output: 422 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 16:30:34,626 INFO L349 Elim1Store]: treesize reduction 492, result has 63.4 percent of original size [2023-12-02 16:30:34,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 31 new quantified variables, introduced 153 case distinctions, treesize of input 83060 treesize of output 67221 [2023-12-02 16:30:38,698 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 16:30:39,914 INFO L224 Elim1Store]: Index analysis took 598 ms