./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire --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 49ed7f3e9a0a6ed433709b0bb1effeae8bd9acd1921ce556b935c6a1999ca674 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:18:26,036 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:18:26,108 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:18:26,114 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:18:26,115 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:18:26,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:18:26,143 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:18:26,144 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:18:26,145 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:18:26,145 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:18:26,146 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:18:26,147 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:18:26,147 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:18:26,148 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:18:26,148 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:18:26,149 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:18:26,149 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:18:26,150 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:18:26,150 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:18:26,151 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:18:26,152 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:18:26,152 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:18:26,153 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:18:26,154 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:18:26,155 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:18:26,155 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:18:26,156 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:18:26,156 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:18:26,160 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:18:26,161 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:18:26,161 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:18:26,162 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:18:26,162 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:18:26,162 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:18:26,163 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:26,163 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:18:26,163 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:18:26,164 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:18:26,164 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:18:26,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:18:26,165 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:18:26,166 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:18:26,167 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:18:26,167 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:18:26,167 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_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49ed7f3e9a0a6ed433709b0bb1effeae8bd9acd1921ce556b935c6a1999ca674 [2023-11-23 21:18:26,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:18:26,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:18:26,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:18:26,521 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:18:26,523 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:18:26,525 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i [2023-11-23 21:18:29,749 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:18:30,273 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:18:30,274 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i [2023-11-23 21:18:30,326 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/data/46250a219/b202509c241144109e3ae1ff83e37308/FLAGa59aebc9f [2023-11-23 21:18:30,342 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/data/46250a219/b202509c241144109e3ae1ff83e37308 [2023-11-23 21:18:30,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:18:30,353 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:18:30,355 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:18:30,355 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:18:30,365 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:18:30,366 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:30" (1/1) ... [2023-11-23 21:18:30,367 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ada5c65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:30, skipping insertion in model container [2023-11-23 21:18:30,368 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:30" (1/1) ... [2023-11-23 21:18:30,513 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:18:30,838 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_0cfa5bcf-6701-4856-9a33-85a1e7281cac/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i[4496,4509] [2023-11-23 21:18:30,850 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_0cfa5bcf-6701-4856-9a33-85a1e7281cac/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i[4556,4569] [2023-11-23 21:18:32,069 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,070 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,071 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,072 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,073 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,090 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,099 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,103 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,114 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,139 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,145 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,146 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,147 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,484 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:18:32,485 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:18:32,486 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:18:32,488 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:18:32,489 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:18:32,490 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:18:32,491 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:18:32,492 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:18:32,493 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:18:32,493 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:18:32,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:18:32,718 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:18:32,741 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_0cfa5bcf-6701-4856-9a33-85a1e7281cac/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i[4496,4509] [2023-11-23 21:18:32,742 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_0cfa5bcf-6701-4856-9a33-85a1e7281cac/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i[4556,4569] [2023-11-23 21:18:32,821 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,822 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,828 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,829 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,834 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,844 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,848 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,849 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,850 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,852 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,856 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,856 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,857 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:18:32,895 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:18:32,896 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:18:32,897 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:18:32,898 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:18:32,899 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:18:32,900 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:18:32,901 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:18:32,901 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:18:32,902 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:18:32,902 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:18:32,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:18:33,252 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,253 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,253 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,254 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,254 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,254 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,255 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,255 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,255 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,255 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,255 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,256 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,256 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,256 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,256 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,256 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:18:33,265 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:18:33,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33 WrapperNode [2023-11-23 21:18:33,266 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:18:33,267 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:18:33,267 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:18:33,267 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:18:33,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33" (1/1) ... [2023-11-23 21:18:33,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33" (1/1) ... [2023-11-23 21:18:33,416 INFO L138 Inliner]: procedures = 678, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 141 [2023-11-23 21:18:33,416 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:18:33,417 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:18:33,417 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:18:33,418 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:18:33,428 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33" (1/1) ... [2023-11-23 21:18:33,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33" (1/1) ... [2023-11-23 21:18:33,432 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33" (1/1) ... [2023-11-23 21:18:33,433 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33" (1/1) ... [2023-11-23 21:18:33,446 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33" (1/1) ... [2023-11-23 21:18:33,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33" (1/1) ... [2023-11-23 21:18:33,454 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33" (1/1) ... [2023-11-23 21:18:33,457 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33" (1/1) ... [2023-11-23 21:18:33,462 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:18:33,463 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:18:33,464 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:18:33,464 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:18:33,465 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33" (1/1) ... [2023-11-23 21:18:33,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:33,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:33,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:18:33,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:18:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:18:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:18:33,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:18:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-11-23 21:18:33,570 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-11-23 21:18:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:18:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2023-11-23 21:18:33,570 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2023-11-23 21:18:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:18:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:18:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:18:33,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:18:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:18:33,571 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:18:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:18:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:18:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:18:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 21:18:33,572 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 21:18:33,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:18:33,792 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:18:33,794 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:18:34,088 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:18:34,298 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:18:34,298 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:18:34,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:34 BoogieIcfgContainer [2023-11-23 21:18:34,300 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:18:34,303 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:18:34,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:18:34,306 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:18:34,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:18:30" (1/3) ... [2023-11-23 21:18:34,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165fe777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:34, skipping insertion in model container [2023-11-23 21:18:34,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:33" (2/3) ... [2023-11-23 21:18:34,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165fe777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:34, skipping insertion in model container [2023-11-23 21:18:34,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:34" (3/3) ... [2023-11-23 21:18:34,309 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness_negated.i [2023-11-23 21:18:34,330 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:18:34,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:18:34,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:18:34,397 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;@30de41b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:18:34,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:18:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 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) [2023-11-23 21:18:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:18:34,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:34,415 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] [2023-11-23 21:18:34,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:34,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:34,424 INFO L85 PathProgramCache]: Analyzing trace with hash 732081457, now seen corresponding path program 1 times [2023-11-23 21:18:34,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:34,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923765925] [2023-11-23 21:18:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:34,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:18:35,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:35,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923765925] [2023-11-23 21:18:35,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923765925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:35,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112471696] [2023-11-23 21:18:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:35,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:35,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:35,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:35,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:18:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:35,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-23 21:18:35,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:36,092 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 [2023-11-23 21:18:36,108 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 [2023-11-23 21:18:36,217 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 [2023-11-23 21:18:36,249 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 37 treesize of output 21 [2023-11-23 21:18:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:18:39,033 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:18:39,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112471696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:39,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:18:39,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2023-11-23 21:18:39,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246644332] [2023-11-23 21:18:39,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:39,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:18:39,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:39,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:18:39,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:18:39,083 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 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) [2023-11-23 21:18:39,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:39,769 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2023-11-23 21:18:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:18:39,772 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 [2023-11-23 21:18:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:39,780 INFO L225 Difference]: With dead ends: 124 [2023-11-23 21:18:39,781 INFO L226 Difference]: Without dead ends: 81 [2023-11-23 21:18:39,784 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 [2023-11-23 21:18:39,793 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 33 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:39,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 244 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:18:39,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-23 21:18:39,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2023-11-23 21:18:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.288888888888889) internal successors, (58), 47 states have internal predecessors, (58), 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) [2023-11-23 21:18:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2023-11-23 21:18:39,891 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 37 [2023-11-23 21:18:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:39,892 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2023-11-23 21:18:39,893 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) [2023-11-23 21:18:39,893 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2023-11-23 21:18:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 21:18:39,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:39,899 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] [2023-11-23 21:18:39,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:40,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:18:40,120 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:40,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:40,121 INFO L85 PathProgramCache]: Analyzing trace with hash 327259007, now seen corresponding path program 1 times [2023-11-23 21:18:40,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:40,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598605988] [2023-11-23 21:18:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:40,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 21:18:40,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:40,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598605988] [2023-11-23 21:18:40,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598605988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355043024] [2023-11-23 21:18:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:40,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:40,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:40,549 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:40,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:18:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:40,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-23 21:18:40,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:40,834 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 19 [2023-11-23 21:18:40,854 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 19 [2023-11-23 21:18:40,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:40,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:40,938 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 35 treesize of output 40 [2023-11-23 21:18:40,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:40,948 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 34 treesize of output 25 [2023-11-23 21:18:40,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:40,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:40,976 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 35 treesize of output 40 [2023-11-23 21:18:40,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:40,986 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 27 treesize of output 20 [2023-11-23 21:18:41,102 INFO L349 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2023-11-23 21:18:41,103 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 133 treesize of output 133 [2023-11-23 21:18:41,113 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 113 treesize of output 107 [2023-11-23 21:18:41,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:41,146 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 57 treesize of output 22 [2023-11-23 21:18:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:41,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:41,158 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 45 treesize of output 40 [2023-11-23 21:18:41,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-11-23 21:18:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:18:43,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:48,019 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 8 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) (.cse5 (+ 16 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) (.cse7 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) (and (or (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0) (forall ((v_ArrVal_183 (Array Int Int))) (= (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_ArrVal_183))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (forall ((v_ArrVal_183 (Array Int Int))) (= (select (select (let ((.cse4 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_ArrVal_183))) (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse5) 0)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16| Int) (v_ArrVal_184 Int) (v_ArrVal_185 (Array Int Int))) (= (select (select (let ((.cse6 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_ArrVal_185))) (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_184))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse3) 0)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16| Int) (v_ArrVal_184 Int) (v_ArrVal_185 (Array Int Int))) (= (select (select (let ((.cse8 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_ArrVal_185))) (store .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_184))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse5) 0)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (let ((.cse10 (+ |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 24))) (or (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16| Int) (v_ArrVal_184 Int) (v_ArrVal_185 (Array Int Int))) (not (= (select (select (let ((.cse9 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_ArrVal_185))) (store .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_184))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse10) 0))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 1)) (forall ((v_ArrVal_183 (Array Int Int))) (not (= (select (select (let ((.cse11 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_ArrVal_183))) (store .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse10) 0))) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| 0)))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| Int)) (or (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16| Int) (v_ArrVal_184 Int) (v_ArrVal_185 (Array Int Int))) (not (= (select (select (let ((.cse12 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_16|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_ArrVal_185))) (store .cse12 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse12 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_184))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_183 (Array Int Int))) (not (= (select (select (let ((.cse13 (store (store |c_#memory_$Pointer$.base| |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_~curr~0#1.base_24|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24| v_ArrVal_183))) (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_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_24|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 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))))) is different from false [2023-11-23 21:18:48,206 INFO L349 Elim1Store]: treesize reduction 90, result has 44.8 percent of original size [2023-11-23 21:18:48,207 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 120 treesize of output 151 [2023-11-23 21:18:48,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:18:48,237 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 183 treesize of output 181 [2023-11-23 21:18:48,255 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 132 treesize of output 120 [2023-11-23 21:18:48,370 INFO L349 Elim1Store]: treesize reduction 90, result has 44.8 percent of original size [2023-11-23 21:18:48,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 250 treesize of output 239 [2023-11-23 21:18:48,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:18:48,412 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 391 treesize of output 349 [2023-11-23 21:18:48,444 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 156 treesize of output 144 [2023-11-23 21:18:48,806 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 [2023-11-23 21:18:48,852 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 [2023-11-23 21:18:48,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:18:48,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 68 [2023-11-23 21:18:48,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:18:48,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 76 [2023-11-23 21:18:49,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:49,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:18:49,043 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 34 treesize of output 45 [2023-11-23 21:18:49,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:49,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:18:49,068 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 34 treesize of output 45 [2023-11-23 21:18:49,078 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 107 treesize of output 87 [2023-11-23 21:18:49,083 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,087 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,088 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:18:49,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 66 [2023-11-23 21:18:49,109 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 55 treesize of output 49 [2023-11-23 21:18:49,115 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,119 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 27 treesize of output 25 [2023-11-23 21:18:49,126 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,130 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,131 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2023-11-23 21:18:49,140 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,143 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 20 treesize of output 18 [2023-11-23 21:18:49,181 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:49,186 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,186 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,190 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-23 21:18:49,191 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 [2023-11-23 21:18:49,194 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:49,199 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,200 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,204 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-23 21:18:49,204 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 [2023-11-23 21:18:49,208 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:49,213 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,214 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,218 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-23 21:18:49,218 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 [2023-11-23 21:18:49,226 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:18:49,231 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,232 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:18:49,236 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-23 21:18:49,237 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 [2023-11-23 21:18:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2023-11-23 21:18:49,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355043024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:49,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737806252] [2023-11-23 21:18:49,375 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-23 21:18:49,375 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:18:49,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:18:49,388 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:18:49,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:18:55,592 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 68 for LOIs [2023-11-23 21:18:55,672 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 17 for LOIs [2023-11-23 21:18:55,676 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-11-23 21:18:55,691 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:18:57,149 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_27| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_19| Int)) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_19| 18446744073709551616) (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_27| 18446744073709551616))) (exists ((|v_#memory_int_30| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_72| (Array Int (Array Int Int))) (|v_#memory_real_47| (Array Int (Array Int Real))) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_#memory_$Pointer$.base_72| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_18| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18| Int) (|v_#memory_int_50| (Array Int (Array Int Int)))) (let ((.cse1 (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_18| 24))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1)) (.cse3 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1))) (and (= (let ((.cse0 (store |v_#memory_$Pointer$.base_72| .cse2 (store (select |v_#memory_$Pointer$.base_72| .cse2) .cse3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|)))) (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18| (store (select .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1 .cse2))) |c_#memory_$Pointer$.base|) (= |c_#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18| (store (select |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1 (select (select |c_#memory_real| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1)))) (= (let ((.cse4 (store |v_#memory_$Pointer$.offset_72| .cse2 (store (select |v_#memory_$Pointer$.offset_72| .cse2) .cse3 (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_18|))))) (store .cse4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18| (store (select .cse4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1 .cse3))) |c_#memory_$Pointer$.offset|) (= (store |v_#memory_int_50| .cse2 (store (select |v_#memory_int_50| .cse2) .cse3 (select (select |v_#memory_int_30| .cse2) .cse3))) |v_#memory_int_30|) (= |c_#memory_int| (store |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18| (store (select |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1 (select (select |c_#memory_int| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1)))) (= |v_#memory_real_27| (store |v_#memory_real_47| .cse2 (store (select |v_#memory_real_47| .cse2) .cse3 (select (select |v_#memory_real_27| .cse2) .cse3))))))))) is different from true [2023-11-23 21:18:57,161 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_27| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_19| Int)) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_19| 18446744073709551616) (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_27| 18446744073709551616))) (exists ((|v_#memory_$Pointer$.offset_72| (Array Int (Array Int Int))) (|v_#memory_int_30| (Array Int (Array Int Int))) (|v_#memory_real_47| (Array Int (Array Int Real))) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_#memory_$Pointer$.base_72| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_18| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18| Int) (|v_#memory_int_50| (Array Int (Array Int Int)))) (let ((.cse1 (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_18| 24))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1)) (.cse3 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1))) (and (= (let ((.cse0 (store |v_#memory_$Pointer$.base_72| .cse2 (store (select |v_#memory_$Pointer$.base_72| .cse2) .cse3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|)))) (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18| (store (select .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1 .cse2))) |c_#memory_$Pointer$.base|) (= |c_#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18| (store (select |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1 (select (select |c_#memory_real| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1)))) (= (let ((.cse4 (store |v_#memory_$Pointer$.offset_72| .cse2 (store (select |v_#memory_$Pointer$.offset_72| .cse2) .cse3 (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_18|))))) (store .cse4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18| (store (select .cse4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1 .cse3))) |c_#memory_$Pointer$.offset|) (= (store |v_#memory_int_50| .cse2 (store (select |v_#memory_int_50| .cse2) .cse3 (select (select |v_#memory_int_30| .cse2) .cse3))) |v_#memory_int_30|) (= |c_#memory_int| (store |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18| (store (select |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1 (select (select |c_#memory_int| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_18|) .cse1)))) (= |v_#memory_real_27| (store |v_#memory_real_47| .cse2 (store (select |v_#memory_real_47| .cse2) .cse3 (select (select |v_#memory_real_27| .cse2) .cse3))))))))) is different from true [2023-11-23 21:18:57,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [737806252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:57,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:18:57,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 10, 9] total 29 [2023-11-23 21:18:57,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076498056] [2023-11-23 21:18:57,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:57,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:18:57,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:57,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:18:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=567, Unknown=11, NotChecked=150, Total=812 [2023-11-23 21:18:57,346 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 11 states, 8 states have (on average 1.875) internal successors, (15), 7 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) [2023-11-23 21:18:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:58,176 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2023-11-23 21:18:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:18:58,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.875) internal successors, (15), 7 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 [2023-11-23 21:18:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:58,180 INFO L225 Difference]: With dead ends: 122 [2023-11-23 21:18:58,180 INFO L226 Difference]: Without dead ends: 85 [2023-11-23 21:18:58,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=97, Invalid=660, Unknown=11, NotChecked=162, Total=930 [2023-11-23 21:18:58,183 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:58,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 242 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 152 Unchecked, 0.4s Time] [2023-11-23 21:18:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-23 21:18:58,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2023-11-23 21:18:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 50 states have internal predecessors, (60), 24 states have call successors, (24), 10 states have call predecessors, (24), 11 states have return successors, (25), 22 states have call predecessors, (25), 22 states have call successors, (25) [2023-11-23 21:18:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2023-11-23 21:18:58,211 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 38 [2023-11-23 21:18:58,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:58,211 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2023-11-23 21:18:58,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.875) internal successors, (15), 7 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) [2023-11-23 21:18:58,212 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2023-11-23 21:18:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:18:58,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:58,214 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] [2023-11-23 21:18:58,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:58,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:58,433 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:58,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:58,433 INFO L85 PathProgramCache]: Analyzing trace with hash -782356197, now seen corresponding path program 1 times [2023-11-23 21:18:58,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:58,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865473980] [2023-11-23 21:18:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:58,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 21:18:58,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:58,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865473980] [2023-11-23 21:18:58,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865473980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:58,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732350150] [2023-11-23 21:18:58,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:58,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:58,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:58,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:58,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:18:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:58,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:18:58,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:18:59,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:18:59,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732350150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:59,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:18:59,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-23 21:18:59,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6226511] [2023-11-23 21:18:59,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:59,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:18:59,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:59,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:18:59,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:18:59,075 INFO L87 Difference]: Start difference. First operand 83 states and 109 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) [2023-11-23 21:18:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:59,288 INFO L93 Difference]: Finished difference Result 159 states and 213 transitions. [2023-11-23 21:18:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:18:59,288 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 [2023-11-23 21:18:59,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:59,292 INFO L225 Difference]: With dead ends: 159 [2023-11-23 21:18:59,293 INFO L226 Difference]: Without dead ends: 89 [2023-11-23 21:18:59,296 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 [2023-11-23 21:18:59,298 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 154 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 [2023-11-23 21:18:59,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 154 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:59,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-23 21:18:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-23 21:18:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 56 states have internal predecessors, (64), 24 states have call successors, (24), 10 states have call predecessors, (24), 13 states have return successors, (29), 22 states have call predecessors, (29), 22 states have call successors, (29) [2023-11-23 21:18:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2023-11-23 21:18:59,329 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 40 [2023-11-23 21:18:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:59,329 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2023-11-23 21:18:59,330 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) [2023-11-23 21:18:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2023-11-23 21:18:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 21:18:59,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:59,334 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] [2023-11-23 21:18:59,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:59,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:59,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:59,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:59,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1156903453, now seen corresponding path program 1 times [2023-11-23 21:18:59,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:59,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034223038] [2023-11-23 21:18:59,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:59,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 21:18:59,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:59,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034223038] [2023-11-23 21:18:59,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034223038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:59,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59126969] [2023-11-23 21:18:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:59,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:59,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:59,809 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:59,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:19:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:00,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:19:00,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:19:00,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:00,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59126969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:00,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:00,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-11-23 21:19:00,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553690495] [2023-11-23 21:19:00,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:00,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:19:00,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:00,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:19:00,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:19:00,121 INFO L87 Difference]: Start difference. First operand 89 states and 117 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) [2023-11-23 21:19:00,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:00,391 INFO L93 Difference]: Finished difference Result 185 states and 251 transitions. [2023-11-23 21:19:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:19:00,392 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 [2023-11-23 21:19:00,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:00,394 INFO L225 Difference]: With dead ends: 185 [2023-11-23 21:19:00,394 INFO L226 Difference]: Without dead ends: 109 [2023-11-23 21:19:00,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:19:00,396 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 52 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:00,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 181 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:19:00,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-23 21:19:00,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 93. [2023-11-23 21:19:00,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 60 states have internal predecessors, (70), 24 states have call successors, (24), 10 states have call predecessors, (24), 13 states have return successors, (29), 22 states have call predecessors, (29), 22 states have call successors, (29) [2023-11-23 21:19:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 123 transitions. [2023-11-23 21:19:00,421 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 123 transitions. Word has length 42 [2023-11-23 21:19:00,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:00,422 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 123 transitions. [2023-11-23 21:19:00,422 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) [2023-11-23 21:19:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 123 transitions. [2023-11-23 21:19:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 21:19:00,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:00,424 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] [2023-11-23 21:19:00,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:19:00,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:00,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:00,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1006334099, now seen corresponding path program 1 times [2023-11-23 21:19:00,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:00,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131580756] [2023-11-23 21:19:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:00,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:19:00,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:00,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131580756] [2023-11-23 21:19:00,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131580756] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:00,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145238780] [2023-11-23 21:19:00,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:00,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:00,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:00,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:00,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:19:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:00,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:19:00,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:19:00,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:00,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145238780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:00,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:00,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-23 21:19:00,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434491397] [2023-11-23 21:19:00,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:00,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:00,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:00,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:00,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:19:00,978 INFO L87 Difference]: Start difference. First operand 93 states and 123 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) [2023-11-23 21:19:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:01,043 INFO L93 Difference]: Finished difference Result 183 states and 253 transitions. [2023-11-23 21:19:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:01,044 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 [2023-11-23 21:19:01,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:01,046 INFO L225 Difference]: With dead ends: 183 [2023-11-23 21:19:01,046 INFO L226 Difference]: Without dead ends: 103 [2023-11-23 21:19:01,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:19:01,048 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 86 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 [2023-11-23 21:19:01,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 86 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:19:01,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-23 21:19:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2023-11-23 21:19:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.263157894736842) internal successors, (72), 62 states have internal predecessors, (72), 24 states have call successors, (24), 10 states have call predecessors, (24), 13 states have return successors, (29), 22 states have call predecessors, (29), 22 states have call successors, (29) [2023-11-23 21:19:01,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2023-11-23 21:19:01,089 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 43 [2023-11-23 21:19:01,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:01,091 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2023-11-23 21:19:01,091 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) [2023-11-23 21:19:01,091 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2023-11-23 21:19:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:19:01,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:01,096 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] [2023-11-23 21:19:01,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:19:01,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:01,317 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:01,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:01,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1652538714, now seen corresponding path program 1 times [2023-11-23 21:19:01,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:01,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091858643] [2023-11-23 21:19:01,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:01,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 21:19:01,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:01,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091858643] [2023-11-23 21:19:01,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091858643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:01,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52708875] [2023-11-23 21:19:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:01,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:01,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:01,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:01,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfa5bcf-6701-4856-9a33-85a1e7281cac/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:19:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:01,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-23 21:19:01,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:02,002 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 [2023-11-23 21:19:02,020 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 [2023-11-23 21:19:02,097 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 [2023-11-23 21:19:02,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:19:02,111 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 [2023-11-23 21:19:02,123 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 [2023-11-23 21:19:02,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:19:02,130 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 [2023-11-23 21:19:02,228 INFO L349 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2023-11-23 21:19:02,229 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 121 treesize of output 121 [2023-11-23 21:19:02,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:19:02,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:19:02,241 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 35 treesize of output 30 [2023-11-23 21:19:02,247 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 76 treesize of output 74 [2023-11-23 21:19:02,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:19:02,260 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 [2023-11-23 21:19:02,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 21:19:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:19:05,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:19:08,934 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ 8 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse4 (+ 16 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|))) (and (forall ((v_ArrVal_596 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_596))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse2) 0)) (or (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_592 Int) (v_ArrVal_597 (Array Int Int))) (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_597))) (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_592))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse4) 0)) (let ((.cse6 (+ |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_596 (Array Int Int))) (not (= (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_596))) (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse6) 0))) (forall ((v_ArrVal_592 Int) (v_ArrVal_597 (Array Int Int))) (not (= (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_597))) (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_592))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse6) 0))))) (forall ((v_ArrVal_592 Int) (v_ArrVal_597 (Array Int Int))) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_597))) (store .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_592))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse2) 0)) (or (forall ((v_ArrVal_596 (Array Int Int))) (not (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_596))) (store .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_592 Int) (v_ArrVal_597 (Array Int Int))) (not (= (select (select (let ((.cse10 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_597))) (store .cse10 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse10 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_592))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0)))) (forall ((v_ArrVal_596 (Array Int Int))) (= (select (select (let ((.cse11 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_596))) (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 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse4) 0)))) is different from false [2023-11-23 21:19:09,113 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 16 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) (.cse10 (+ 8 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) (.cse5 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse2 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) (and (or (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| 1)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| 0) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_19| Int) (v_ArrVal_592 Int) (v_ArrVal_597 (Array Int Int))) (= (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_19|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| v_ArrVal_597))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_592))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| Int)) (let ((.cse6 (+ |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 24))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| 1)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| 0) (forall ((v_ArrVal_596 (Array Int Int))) (not (= (select (select (let ((.cse4 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| v_ArrVal_596))) (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse6) 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_19| Int) (v_ArrVal_592 Int) (v_ArrVal_597 (Array Int Int))) (not (= (select (select (let ((.cse7 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_19|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| v_ArrVal_597))) (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_592))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse6) 0)))))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| 1)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| 0) (forall ((v_ArrVal_596 (Array Int Int))) (= (select (select (let ((.cse8 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| v_ArrVal_596))) (store .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| 1)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| 0) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_19| Int) (v_ArrVal_592 Int) (v_ArrVal_597 (Array Int Int))) (= (select (select (let ((.cse9 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_19|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| v_ArrVal_597))) (store .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_592))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse10) 0)))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| 1)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| 0) (forall ((v_ArrVal_596 (Array Int Int))) (= (select (select (let ((.cse11 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| v_ArrVal_596))) (store .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse10) 0)))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| Int)) (or (forall ((v_ArrVal_596 (Array Int Int))) (not (= (select (select (let ((.cse12 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| v_ArrVal_596))) (store .cse12 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse12 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| 1)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| 0) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_19| Int) (v_ArrVal_592 Int) (v_ArrVal_597 (Array Int Int))) (not (= (select (select (let ((.cse13 (store (store |c_#memory_$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_19|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_31| v_ArrVal_597))) (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_ArrVal_592))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0))))))) is different from false [2023-11-23 21:19:09,246 INFO L349 Elim1Store]: treesize reduction 86, result has 45.2 percent of original size [2023-11-23 21:19:09,247 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 4 case distinctions, treesize of input 242 treesize of output 228 [2023-11-23 21:19:09,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:19:09,269 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 238 treesize of output 208 [2023-11-23 21:19:09,284 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 156 treesize of output 144 [2023-11-23 21:19:09,349 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 3 [2023-11-23 21:19:09,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:19:09,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 73 [2023-11-23 21:19:09,539 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:19:09,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:19:09,558 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 [2023-11-23 21:19:09,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,567 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 [2023-11-23 21:19:09,572 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,576 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,587 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 21:19:09,588 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 24 treesize of output 15 [2023-11-23 21:19:09,603 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,604 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,607 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-23 21:19:09,611 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,612 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,616 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-23 21:19:09,621 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:19:09,626 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,627 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,632 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-23 21:19:09,632 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 [2023-11-23 21:19:09,637 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:19:09,642 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,642 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:19:09,647 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-23 21:19:09,647 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 [2023-11-23 21:19:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2023-11-23 21:19:09,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52708875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:19:09,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [429722018] [2023-11-23 21:19:09,773 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-11-23 21:19:09,773 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:19:09,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:19:09,774 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:19:09,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs