./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:34:41,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:34:41,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:34:41,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:34:41,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:34:41,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:34:41,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:34:41,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:34:41,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:34:41,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:34:41,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:34:41,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:34:41,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:34:41,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:34:41,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:34:41,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:34:41,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:34:41,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:34:41,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:34:41,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:34:41,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:34:41,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:34:41,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:34:41,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:34:41,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:34:41,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:34:41,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:34:41,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:34:41,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:34:41,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:34:41,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:34:41,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:34:41,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:34:41,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:34:41,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:34:41,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:34:41,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:34:41,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:34:41,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:34:41,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:34:41,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:34:41,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 15:34:41,824 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:34:41,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:34:41,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:34:41,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:34:41,826 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:34:41,826 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:34:41,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:34:41,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:34:41,827 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:34:41,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:34:41,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:34:41,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:34:41,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:34:41,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:34:41,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:34:41,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:34:41,833 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:34:41,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:34:41,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:34:41,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:34:41,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:34:41,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:34:41,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:34:41,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:34:41,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:34:41,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:34:41,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:34:41,835 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:34:41,835 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:34:41,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:34:41,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:34:41,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 [2021-12-21 15:34:42,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:34:42,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:34:42,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:34:42,060 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:34:42,061 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:34:42,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-12-21 15:34:42,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b583f5ca/319f15d2730044778b4afbc3acc0128b/FLAGab0bf407b [2021-12-21 15:34:42,822 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:34:42,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-12-21 15:34:42,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b583f5ca/319f15d2730044778b4afbc3acc0128b/FLAGab0bf407b [2021-12-21 15:34:43,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b583f5ca/319f15d2730044778b4afbc3acc0128b [2021-12-21 15:34:43,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:34:43,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:34:43,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:34:43,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:34:43,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:34:43,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:34:43" (1/1) ... [2021-12-21 15:34:43,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35dd485b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:43, skipping insertion in model container [2021-12-21 15:34:43,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:34:43" (1/1) ... [2021-12-21 15:34:43,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:34:43,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:34:43,353 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-12-21 15:34:43,360 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-12-21 15:34:43,878 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:43,880 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:43,880 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:43,881 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:43,882 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:43,892 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:43,904 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:43,905 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:43,906 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:43,907 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:43,911 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:43,914 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:43,915 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,099 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:34:44,100 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:34:44,101 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:34:44,102 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:34:44,103 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:34:44,104 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:34:44,104 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:34:44,105 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:34:44,105 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:34:44,106 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:34:44,184 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:34:44,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:34:44,215 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:34:44,226 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-12-21 15:34:44,227 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-12-21 15:34:44,264 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,265 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,265 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,265 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,266 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,271 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,272 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,273 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,291 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,292 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,293 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,293 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,294 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:34:44,319 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:34:44,320 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:34:44,320 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:34:44,321 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:34:44,322 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:34:44,322 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:34:44,323 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:34:44,323 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:34:44,324 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:34:44,324 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:34:44,348 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:34:44,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:34:44,550 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:34:44,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:44 WrapperNode [2021-12-21 15:34:44,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:34:44,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:34:44,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:34:44,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:34:44,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:44" (1/1) ... [2021-12-21 15:34:44,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:44" (1/1) ... [2021-12-21 15:34:44,687 INFO L137 Inliner]: procedures = 679, calls = 1045, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 134 [2021-12-21 15:34:44,688 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:34:44,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:34:44,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:34:44,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:34:44,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:44" (1/1) ... [2021-12-21 15:34:44,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:44" (1/1) ... [2021-12-21 15:34:44,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:44" (1/1) ... [2021-12-21 15:34:44,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:44" (1/1) ... [2021-12-21 15:34:44,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:44" (1/1) ... [2021-12-21 15:34:44,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:44" (1/1) ... [2021-12-21 15:34:44,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:44" (1/1) ... [2021-12-21 15:34:44,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:34:44,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:34:44,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:34:44,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:34:44,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:44" (1/1) ... [2021-12-21 15:34:44,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:34:44,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:34:44,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 15:34:44,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 15:34:44,825 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_back [2021-12-21 15:34:44,825 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_back [2021-12-21 15:34:44,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:34:44,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 15:34:44,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 15:34:44,826 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-21 15:34:44,827 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-21 15:34:44,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:34:44,828 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-21 15:34:44,828 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-21 15:34:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:34:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 15:34:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:34:44,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:34:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-12-21 15:34:44,830 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-12-21 15:34:44,830 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 15:34:44,830 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 15:34:44,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:34:44,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 15:34:44,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 15:34:44,832 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-21 15:34:44,832 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-21 15:34:44,832 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-12-21 15:34:44,832 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-12-21 15:34:44,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:34:45,096 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:34:45,098 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:34:45,392 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:34:45,399 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:34:45,399 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 15:34:45,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:34:45 BoogieIcfgContainer [2021-12-21 15:34:45,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:34:45,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:34:45,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:34:45,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:34:45,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:34:43" (1/3) ... [2021-12-21 15:34:45,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9e4d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:34:45, skipping insertion in model container [2021-12-21 15:34:45,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:34:44" (2/3) ... [2021-12-21 15:34:45,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9e4d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:34:45, skipping insertion in model container [2021-12-21 15:34:45,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:34:45" (3/3) ... [2021-12-21 15:34:45,408 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness.i [2021-12-21 15:34:45,413 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:34:45,413 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:34:45,447 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:34:45,452 INFO L339 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:34:45,452 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 15:34:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-21 15:34:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 15:34:45,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:34:45,480 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:34:45,481 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:34:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:34:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash 464723229, now seen corresponding path program 1 times [2021-12-21 15:34:45,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:34:45,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706123724] [2021-12-21 15:34:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:34:45,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:34:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:45,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:34:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:45,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:34:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:45,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:34:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:45,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:34:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:45,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 15:34:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:45,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 15:34:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:45,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:34:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:45,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:34:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:45,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:34:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:45,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 15:34:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:45,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:34:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-21 15:34:45,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:34:45,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706123724] [2021-12-21 15:34:45,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706123724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:34:45,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:34:45,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:34:45,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284198812] [2021-12-21 15:34:45,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:34:45,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:34:45,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:34:45,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:34:45,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:34:45,967 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 15:34:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:34:46,020 INFO L93 Difference]: Finished difference Result 188 states and 271 transitions. [2021-12-21 15:34:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:34:46,022 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2021-12-21 15:34:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:34:46,030 INFO L225 Difference]: With dead ends: 188 [2021-12-21 15:34:46,031 INFO L226 Difference]: Without dead ends: 93 [2021-12-21 15:34:46,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:34:46,040 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:34:46,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:34:46,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-21 15:34:46,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-21 15:34:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-21 15:34:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-12-21 15:34:46,073 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 84 [2021-12-21 15:34:46,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:34:46,074 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-12-21 15:34:46,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 15:34:46,074 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-12-21 15:34:46,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 15:34:46,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:34:46,077 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:34:46,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:34:46,078 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:34:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:34:46,079 INFO L85 PathProgramCache]: Analyzing trace with hash 463621205, now seen corresponding path program 1 times [2021-12-21 15:34:46,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:34:46,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016071751] [2021-12-21 15:34:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:34:46,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:34:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:34:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:34:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:34:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:34:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 15:34:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 15:34:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:34:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:34:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:34:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 15:34:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:34:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 15:34:46,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:34:46,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016071751] [2021-12-21 15:34:46,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016071751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:34:46,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467572552] [2021-12-21 15:34:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:34:46,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:34:46,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:34:46,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:34:46,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:34:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:46,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-21 15:34:46,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:34:46,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:34:46,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-21 15:34:46,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:34:46,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-21 15:34:46,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:34:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:34:46,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:34:46,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-21 15:34:46,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:34:46,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:34:46,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:34:46,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-21 15:34:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-21 15:34:47,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:34:47,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467572552] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:34:47,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:34:47,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2021-12-21 15:34:47,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655894995] [2021-12-21 15:34:47,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:34:47,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:34:47,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:34:47,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:34:47,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-21 15:34:47,948 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 15:34:48,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:34:48,056 INFO L93 Difference]: Finished difference Result 201 states and 273 transitions. [2021-12-21 15:34:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:34:48,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 84 [2021-12-21 15:34:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:34:48,061 INFO L225 Difference]: With dead ends: 201 [2021-12-21 15:34:48,061 INFO L226 Difference]: Without dead ends: 142 [2021-12-21 15:34:48,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 12 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-21 15:34:48,063 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 35 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:34:48,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 554 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2021-12-21 15:34:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-21 15:34:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 131. [2021-12-21 15:34:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2588235294117647) internal successors, (107), 88 states have internal predecessors, (107), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (35), 30 states have call predecessors, (35), 32 states have call successors, (35) [2021-12-21 15:34:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 175 transitions. [2021-12-21 15:34:48,084 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 175 transitions. Word has length 84 [2021-12-21 15:34:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:34:48,085 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 175 transitions. [2021-12-21 15:34:48,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 15:34:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 175 transitions. [2021-12-21 15:34:48,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 15:34:48,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:34:48,092 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:34:48,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 15:34:48,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:34:48,308 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:34:48,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:34:48,309 INFO L85 PathProgramCache]: Analyzing trace with hash -345725421, now seen corresponding path program 1 times [2021-12-21 15:34:48,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:34:48,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626200564] [2021-12-21 15:34:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:34:48,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:34:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:34:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:34:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:34:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:34:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 15:34:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 15:34:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:34:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:34:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:34:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 15:34:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:34:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 15:34:48,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:34:48,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626200564] [2021-12-21 15:34:48,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626200564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:34:48,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583721075] [2021-12-21 15:34:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:34:48,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:34:48,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:34:48,549 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:34:48,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:34:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:34:48,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-21 15:34:48,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:34:48,745 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 15:34:48,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 15:34:48,761 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 15:34:48,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 15:34:51,029 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_6 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_6) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 24)) 0))) (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_6 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_6) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 24)) 0)))) is different from true [2021-12-21 15:34:53,070 WARN L860 $PredicateComparison]: unable to prove that (and (or (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_6 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_6) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 24)) 0))) (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_6 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_6) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 24)) 0)))) (let ((.cse0 (+ c_aws_linked_list_back_~list.offset 24))) (or (not (= (select (select |c_#memory_$Pointer$.base| c_aws_linked_list_back_~list.base) .cse0) 0)) (not (= (select (select |c_#memory_$Pointer$.offset| c_aws_linked_list_back_~list.base) .cse0) 0))))) is different from true [2021-12-21 15:34:55,107 WARN L860 $PredicateComparison]: unable to prove that (and (or (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_6 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_6) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 24)) 0))) (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_6 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_6) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_6 24)) 0)))) (or (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_7 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_7 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_7) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_7 24)) 0))) (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_7 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_7 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_7) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_7 24)) 0))))) is different from true [2021-12-21 15:34:57,322 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_8 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_8 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_8) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_8 24)) 0))) (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_8 Int) (v_aws_linked_list_back_~list.base_BEFORE_CALL_8 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_8) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_8 24)) 0)))) is different from true [2021-12-21 15:34:59,397 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_9 Int) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_9 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_9) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_9 24)) 0))) (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_9 Int) (v_aws_linked_list_back_~list.offset_BEFORE_CALL_9 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_9) (+ v_aws_linked_list_back_~list.offset_BEFORE_CALL_9 24)) 0)))) is different from true [2021-12-21 15:35:07,471 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-21 15:35:15,633 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-21 15:35:23,757 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-21 15:35:29,819 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-21 15:35:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 12 not checked. [2021-12-21 15:35:29,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:35:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 15:35:32,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583721075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:35:32,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:35:32,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 11] total 28 [2021-12-21 15:35:32,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425315594] [2021-12-21 15:35:32,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:35:32,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-21 15:35:32,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:32,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-21 15:35:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=439, Unknown=9, NotChecked=230, Total=756 [2021-12-21 15:35:32,484 INFO L87 Difference]: Start difference. First operand 131 states and 175 transitions. Second operand has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 7 states have call successors, (23), 6 states have call predecessors, (23), 9 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22)