/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:18:57,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:18:57,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:18:58,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 05:18:58,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 05:18:58,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 05:18:58,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 05:18:58,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 05:18:58,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 05:18:58,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 05:18:58,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 05:18:58,039 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 05:18:58,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:18:58,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:18:58,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:18:58,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:18:58,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:18:58,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:18:58,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:18:58,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:18:58,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:18:58,059 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:18:58,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:18:58,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:18:58,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 05:18:58,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 05:18:58,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 05:18:58,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 05:18:58,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 05:18:58,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 05:18:58,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 05:18:58,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 05:18:58,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 05:18:58,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 05:18:58,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 05:18:58,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 05:18:58,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 05:18:58,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 05:18:58,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:18:58,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:18:58,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:18:58,078 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 05:18:58,112 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:18:58,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:18:58,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:18:58,112 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:18:58,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:18:58,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:18:58,114 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:18:58,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:18:58,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:18:58,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:18:58,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:18:58,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:18:58,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:18:58,115 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:18:58,116 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:18:58,116 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:18:58,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:18:58,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:18:58,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:18:58,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:18:58,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:18:58,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:18:58,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:18:58,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:18:58,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:18:58,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:18:58,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:18:58,118 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:18:58,118 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:18:58,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:18:58,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:18:58,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:18:58,120 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:18:58,120 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:18:58,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:18:58,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:18:58,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:18:58,388 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:18:58,390 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:18:58,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2022-01-11 05:18:58,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1aa43c8b/6b0eccda9fca44ec980a18c383038f27/FLAG2ff3e48f6 [2022-01-11 05:18:58,968 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:18:58,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2022-01-11 05:18:58,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1aa43c8b/6b0eccda9fca44ec980a18c383038f27/FLAG2ff3e48f6 [2022-01-11 05:18:59,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1aa43c8b/6b0eccda9fca44ec980a18c383038f27 [2022-01-11 05:18:59,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:18:59,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:18:59,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:18:59,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:18:59,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:18:59,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:18:59" (1/1) ... [2022-01-11 05:18:59,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48cfc1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59, skipping insertion in model container [2022-01-11 05:18:59,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:18:59" (1/1) ... [2022-01-11 05:18:59,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:18:59,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:18:59,515 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i[813,826] [2022-01-11 05:18:59,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:18:59,668 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-11 05:18:59,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:18:59,687 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i[813,826] [2022-01-11 05:18:59,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:18:59,737 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:18:59,750 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i[813,826] [2022-01-11 05:18:59,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:18:59,799 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:18:59,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59 WrapperNode [2022-01-11 05:18:59,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:18:59,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:18:59,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:18:59,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:18:59,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59" (1/1) ... [2022-01-11 05:18:59,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59" (1/1) ... [2022-01-11 05:18:59,861 INFO L137 Inliner]: procedures = 128, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 115 [2022-01-11 05:18:59,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:18:59,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:18:59,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:18:59,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:18:59,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59" (1/1) ... [2022-01-11 05:18:59,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59" (1/1) ... [2022-01-11 05:18:59,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59" (1/1) ... [2022-01-11 05:18:59,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59" (1/1) ... [2022-01-11 05:18:59,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59" (1/1) ... [2022-01-11 05:18:59,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59" (1/1) ... [2022-01-11 05:18:59,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59" (1/1) ... [2022-01-11 05:18:59,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:18:59,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:18:59,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:18:59,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:18:59,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59" (1/1) ... [2022-01-11 05:18:59,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:18:59,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:18:59,928 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) [2022-01-11 05:18:59,937 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 [2022-01-11 05:18:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-11 05:18:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-11 05:18:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:18:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-11 05:18:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-11 05:18:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 05:18:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 05:18:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:18:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:18:59,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:19:00,086 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:19:00,089 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:19:00,594 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:19:00,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:19:00,599 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-11 05:19:00,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:19:00 BoogieIcfgContainer [2022-01-11 05:19:00,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:19:00,602 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:19:00,602 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:19:00,604 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:19:00,607 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:19:00" (1/1) ... [2022-01-11 05:19:00,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:19:00 BasicIcfg [2022-01-11 05:19:00,695 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:19:00,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:19:00,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:19:00,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:19:00,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:18:59" (1/4) ... [2022-01-11 05:19:00,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d83fcf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:19:00, skipping insertion in model container [2022-01-11 05:19:00,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:18:59" (2/4) ... [2022-01-11 05:19:00,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d83fcf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:19:00, skipping insertion in model container [2022-01-11 05:19:00,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:19:00" (3/4) ... [2022-01-11 05:19:00,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d83fcf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:19:00, skipping insertion in model container [2022-01-11 05:19:00,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:19:00" (4/4) ... [2022-01-11 05:19:00,702 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-1.iTransformedIcfg [2022-01-11 05:19:00,707 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:19:00,707 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:19:00,747 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:19:00,755 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 [2022-01-11 05:19:00,755 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:19:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:00,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-11 05:19:00,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:00,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:19:00,769 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:00,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:00,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1838269411, now seen corresponding path program 1 times [2022-01-11 05:19:00,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:00,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845448746] [2022-01-11 05:19:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:00,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:19:01,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:19:01,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845448746] [2022-01-11 05:19:01,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845448746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:19:01,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:19:01,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 05:19:01,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990155460] [2022-01-11 05:19:01,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:19:01,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 05:19:01,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:19:01,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 05:19:01,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 05:19:01,288 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:01,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:19:01,516 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-01-11 05:19:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 05:19:01,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-11 05:19:01,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:19:01,525 INFO L225 Difference]: With dead ends: 49 [2022-01-11 05:19:01,525 INFO L226 Difference]: Without dead ends: 22 [2022-01-11 05:19:01,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:19:01,532 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 05:19:01,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 23 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 05:19:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-11 05:19:01,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-11 05:19:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-11 05:19:01,562 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-01-11 05:19:01,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:19:01,562 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-11 05:19:01,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:01,562 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-11 05:19:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-11 05:19:01,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:01,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:19:01,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 05:19:01,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:01,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1261771014, now seen corresponding path program 1 times [2022-01-11 05:19:01,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:01,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394634000] [2022-01-11 05:19:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:01,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:19:02,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:19:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394634000] [2022-01-11 05:19:02,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394634000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:19:02,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:19:02,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-11 05:19:02,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331322203] [2022-01-11 05:19:02,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:19:02,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-11 05:19:02,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:19:02,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-11 05:19:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-11 05:19:02,339 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:19:03,237 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-01-11 05:19:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 05:19:03,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-11 05:19:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:19:03,239 INFO L225 Difference]: With dead ends: 36 [2022-01-11 05:19:03,239 INFO L226 Difference]: Without dead ends: 31 [2022-01-11 05:19:03,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-11 05:19:03,241 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 05:19:03,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 23 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-11 05:19:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-11 05:19:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-01-11 05:19:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-11 05:19:03,248 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-01-11 05:19:03,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:19:03,249 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-11 05:19:03,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-11 05:19:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-11 05:19:03,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:03,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:19:03,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 05:19:03,250 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:03,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:03,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1290400165, now seen corresponding path program 1 times [2022-01-11 05:19:03,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:03,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387949512] [2022-01-11 05:19:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:03,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:19:03,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:19:03,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387949512] [2022-01-11 05:19:03,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387949512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:19:03,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:19:03,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-11 05:19:03,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820163208] [2022-01-11 05:19:03,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:19:03,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 05:19:03,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:19:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 05:19:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-11 05:19:03,351 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:19:03,663 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-01-11 05:19:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 05:19:03,663 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-11 05:19:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:19:03,664 INFO L225 Difference]: With dead ends: 33 [2022-01-11 05:19:03,664 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 05:19:03,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-11 05:19:03,665 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 05:19:03,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 05:19:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 05:19:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-11 05:19:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-11 05:19:03,671 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2022-01-11 05:19:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:19:03,671 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-11 05:19:03,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-11 05:19:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-11 05:19:03,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:03,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:19:03,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 05:19:03,672 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:03,673 INFO L85 PathProgramCache]: Analyzing trace with hash 662574799, now seen corresponding path program 1 times [2022-01-11 05:19:03,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:03,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093305806] [2022-01-11 05:19:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:03,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:19:05,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:19:05,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093305806] [2022-01-11 05:19:05,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093305806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:19:05,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372501845] [2022-01-11 05:19:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:05,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:19:05,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:19:05,110 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) [2022-01-11 05:19:05,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 05:19:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 69 conjunts are in the unsatisfiable core [2022-01-11 05:19:13,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:19:13,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-11 05:19:13,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:13,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:13,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:13,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:13,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:13,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:13,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:13,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:13,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 52 [2022-01-11 05:19:13,517 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-11 05:19:13,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-01-11 05:19:13,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-01-11 05:19:13,615 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 15 treesize of output 11 [2022-01-11 05:19:13,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 34 [2022-01-11 05:19:13,638 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 05:19:13,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 69 treesize of output 29 [2022-01-11 05:19:13,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-11 05:19:14,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:14,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:14,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:14,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:14,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:14,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:14,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:19:14,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:19:14,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 111 treesize of output 52 [2022-01-11 05:19:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:19:14,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:19:14,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:19:14,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 246 treesize of output 123 [2022-01-11 05:19:14,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:19:14,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 83 [2022-01-11 05:19:14,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 50 [2022-01-11 05:19:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:19:14,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372501845] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:19:14,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:19:14,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 31 [2022-01-11 05:19:14,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189927098] [2022-01-11 05:19:14,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:19:14,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-11 05:19:14,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:19:14,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-11 05:19:14,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=834, Unknown=2, NotChecked=0, Total=930 [2022-01-11 05:19:14,896 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:19:16,707 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-01-11 05:19:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-11 05:19:16,708 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-11 05:19:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:19:16,710 INFO L225 Difference]: With dead ends: 42 [2022-01-11 05:19:16,710 INFO L226 Difference]: Without dead ends: 37 [2022-01-11 05:19:16,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=202, Invalid=1356, Unknown=2, NotChecked=0, Total=1560 [2022-01-11 05:19:16,712 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 102 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-11 05:19:16,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 72 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 309 Invalid, 0 Unknown, 87 Unchecked, 1.3s Time] [2022-01-11 05:19:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-11 05:19:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-01-11 05:19:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-11 05:19:16,719 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2022-01-11 05:19:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:19:16,719 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-11 05:19:16,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-11 05:19:16,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-11 05:19:16,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:16,720 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:19:16,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 05:19:16,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:19:16,921 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:16,922 INFO L85 PathProgramCache]: Analyzing trace with hash 691203950, now seen corresponding path program 1 times [2022-01-11 05:19:16,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:16,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927101438] [2022-01-11 05:19:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:16,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat