/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_LAZY.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 17:41:17,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 17:41:17,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 17:41:17,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 17:41:17,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 17:41:17,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 17:41:17,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 17:41:17,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 17:41:17,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 17:41:17,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 17:41:17,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 17:41:17,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 17:41:17,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 17:41:17,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 17:41:17,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 17:41:17,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 17:41:17,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 17:41:17,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 17:41:17,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 17:41:17,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 17:41:17,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 17:41:17,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 17:41:17,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 17:41:17,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 17:41:17,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 17:41:17,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 17:41:17,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 17:41:17,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 17:41:17,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 17:41:17,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 17:41:17,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 17:41:17,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 17:41:17,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 17:41:17,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 17:41:17,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 17:41:17,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 17:41:17,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 17:41:17,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 17:41:17,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 17:41:17,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 17:41:17,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 17:41:17,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 17:41:18,000 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 17:41:18,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 17:41:18,000 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 17:41:18,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 17:41:18,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 17:41:18,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 17:41:18,001 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 17:41:18,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 17:41:18,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 17:41:18,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 17:41:18,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 17:41:18,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 17:41:18,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 17:41:18,002 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 17:41:18,002 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 17:41:18,002 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 17:41:18,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 17:41:18,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 17:41:18,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 17:41:18,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 17:41:18,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 17:41:18,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 17:41:18,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 17:41:18,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 17:41:18,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 17:41:18,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 17:41:18,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 17:41:18,004 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 17:41:18,004 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 17:41:18,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 17:41:18,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 17:41:18,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 17:41:18,005 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 17:41:18,005 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 17:41:18,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 17:41:18,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 17:41:18,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 17:41:18,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 17:41:18,228 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 17:41:18,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2022-01-10 17:41:18,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/633e70407/3c7e94d1b0234c63b9d1acb2367e676f/FLAG0ada0a242 [2022-01-10 17:41:18,625 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 17:41:18,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2022-01-10 17:41:18,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/633e70407/3c7e94d1b0234c63b9d1acb2367e676f/FLAG0ada0a242 [2022-01-10 17:41:19,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/633e70407/3c7e94d1b0234c63b9d1acb2367e676f [2022-01-10 17:41:19,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 17:41:19,036 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 17:41:19,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 17:41:19,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 17:41:19,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 17:41:19,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:41:19" (1/1) ... [2022-01-10 17:41:19,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52cb88e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19, skipping insertion in model container [2022-01-10 17:41:19,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:41:19" (1/1) ... [2022-01-10 17:41:19,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 17:41:19,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 17:41:19,271 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] [2022-01-10 17:41:19,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 17:41:19,365 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 17:41:19,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 17:41:19,370 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] [2022-01-10 17:41:19,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 17:41:19,401 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 17:41:19,408 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] [2022-01-10 17:41:19,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 17:41:19,470 INFO L208 MainTranslator]: Completed translation [2022-01-10 17:41:19,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19 WrapperNode [2022-01-10 17:41:19,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 17:41:19,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 17:41:19,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 17:41:19,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 17:41:19,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19" (1/1) ... [2022-01-10 17:41:19,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19" (1/1) ... [2022-01-10 17:41:19,520 INFO L137 Inliner]: procedures = 128, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 115 [2022-01-10 17:41:19,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 17:41:19,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 17:41:19,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 17:41:19,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 17:41:19,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19" (1/1) ... [2022-01-10 17:41:19,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19" (1/1) ... [2022-01-10 17:41:19,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19" (1/1) ... [2022-01-10 17:41:19,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19" (1/1) ... [2022-01-10 17:41:19,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19" (1/1) ... [2022-01-10 17:41:19,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19" (1/1) ... [2022-01-10 17:41:19,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19" (1/1) ... [2022-01-10 17:41:19,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 17:41:19,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 17:41:19,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 17:41:19,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 17:41:19,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19" (1/1) ... [2022-01-10 17:41:19,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 17:41:19,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:41:19,597 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) [2022-01-10 17:41:19,609 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 [2022-01-10 17:41:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 17:41:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 17:41:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 17:41:19,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 17:41:19,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 17:41:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 17:41:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 17:41:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 17:41:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 17:41:19,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 17:41:19,754 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 17:41:19,755 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 17:41:20,115 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 17:41:20,119 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 17:41:20,119 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 17:41:20,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:41:20 BoogieIcfgContainer [2022-01-10 17:41:20,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 17:41:20,121 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 17:41:20,121 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 17:41:20,124 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 17:41:20,127 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:41:20" (1/1) ... [2022-01-10 17:41:20,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 05:41:20 BasicIcfg [2022-01-10 17:41:20,200 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 17:41:20,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 17:41:20,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 17:41:20,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 17:41:20,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 05:41:19" (1/4) ... [2022-01-10 17:41:20,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b41812d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:41:20, skipping insertion in model container [2022-01-10 17:41:20,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:41:19" (2/4) ... [2022-01-10 17:41:20,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b41812d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:41:20, skipping insertion in model container [2022-01-10 17:41:20,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:41:20" (3/4) ... [2022-01-10 17:41:20,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b41812d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 05:41:20, skipping insertion in model container [2022-01-10 17:41:20,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 05:41:20" (4/4) ... [2022-01-10 17:41:20,205 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-1.iTransformedIcfg [2022-01-10 17:41:20,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 17:41:20,208 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 17:41:20,235 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 17:41:20,240 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 [2022-01-10 17:41:20,240 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 17:41:20,248 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) [2022-01-10 17:41:20,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 17:41:20,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:20,251 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 17:41:20,252 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:20,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1838269411, now seen corresponding path program 1 times [2022-01-10 17:41:20,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:20,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316682738] [2022-01-10 17:41:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:20,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 17:41:20,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:20,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316682738] [2022-01-10 17:41:20,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316682738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:41:20,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:41:20,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 17:41:20,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799578916] [2022-01-10 17:41:20,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:41:20,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 17:41:20,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:20,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 17:41:20,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 17:41:20,512 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) [2022-01-10 17:41:20,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:20,672 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-01-10 17:41:20,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 17:41:20,674 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 [2022-01-10 17:41:20,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:20,678 INFO L225 Difference]: With dead ends: 49 [2022-01-10 17:41:20,678 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 17:41:20,680 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 [2022-01-10 17:41:20,682 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:20,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 23 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 17:41:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 17:41:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-10 17:41:20,727 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) [2022-01-10 17:41:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-10 17:41:20,729 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-01-10 17:41:20,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:20,729 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-10 17:41:20,729 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) [2022-01-10 17:41:20,729 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-10 17:41:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 17:41:20,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:20,730 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] [2022-01-10 17:41:20,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 17:41:20,730 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:20,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1261771014, now seen corresponding path program 1 times [2022-01-10 17:41:20,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:20,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059325014] [2022-01-10 17:41:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:20,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 17:41:21,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:21,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059325014] [2022-01-10 17:41:21,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059325014] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:41:21,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:41:21,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 17:41:21,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385486294] [2022-01-10 17:41:21,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:41:21,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 17:41:21,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:21,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 17:41:21,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 17:41:21,432 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) [2022-01-10 17:41:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:22,048 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-01-10 17:41:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 17:41:22,049 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 [2022-01-10 17:41:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:22,050 INFO L225 Difference]: With dead ends: 36 [2022-01-10 17:41:22,050 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 17:41:22,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-10 17:41:22,051 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:22,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 23 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 17:41:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 17:41:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-01-10 17:41:22,055 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) [2022-01-10 17:41:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-10 17:41:22,056 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-01-10 17:41:22,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:22,056 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-10 17:41:22,056 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) [2022-01-10 17:41:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-10 17:41:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 17:41:22,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:22,057 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] [2022-01-10 17:41:22,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 17:41:22,057 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:22,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:22,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1290400165, now seen corresponding path program 1 times [2022-01-10 17:41:22,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:22,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904468511] [2022-01-10 17:41:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:22,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 17:41:22,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:22,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904468511] [2022-01-10 17:41:22,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904468511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:41:22,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:41:22,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 17:41:22,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948361974] [2022-01-10 17:41:22,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:41:22,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 17:41:22,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:22,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 17:41:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 17:41:22,131 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) [2022-01-10 17:41:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:22,343 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-01-10 17:41:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 17:41:22,343 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 [2022-01-10 17:41:22,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:22,344 INFO L225 Difference]: With dead ends: 33 [2022-01-10 17:41:22,344 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 17:41:22,344 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 [2022-01-10 17:41:22,345 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, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:22,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 17:41:22,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 17:41:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 17:41:22,349 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) [2022-01-10 17:41:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-10 17:41:22,349 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2022-01-10 17:41:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:22,349 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-10 17:41:22,349 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) [2022-01-10 17:41:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-10 17:41:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 17:41:22,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:22,350 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] [2022-01-10 17:41:22,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 17:41:22,350 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:22,351 INFO L85 PathProgramCache]: Analyzing trace with hash 662574799, now seen corresponding path program 1 times [2022-01-10 17:41:22,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:22,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022167506] [2022-01-10 17:41:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:22,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 17:41:23,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:23,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022167506] [2022-01-10 17:41:23,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022167506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:41:23,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171786383] [2022-01-10 17:41:23,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:23,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:41:23,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:41:23,256 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) [2022-01-10 17:41:23,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 17:41:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:30,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 69 conjunts are in the unsatisfiable core [2022-01-10 17:41:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:41:30,354 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 [2022-01-10 17:41:30,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,391 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 [2022-01-10 17:41:30,476 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-10 17:41:30,476 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 [2022-01-10 17:41:30,483 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 [2022-01-10 17:41:30,530 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 [2022-01-10 17:41:30,533 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 [2022-01-10 17:41:30,545 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 [2022-01-10 17:41:30,737 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 [2022-01-10 17:41:30,742 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 [2022-01-10 17:41:30,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:30,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:30,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:30,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:30,816 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 [2022-01-10 17:41:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 17:41:30,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 17:41:31,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:31,308 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 [2022-01-10 17:41:31,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:31,320 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 [2022-01-10 17:41:31,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:31,328 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 [2022-01-10 17:41:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 17:41:31,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171786383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 17:41:31,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 17:41:31,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 31 [2022-01-10 17:41:31,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941360078] [2022-01-10 17:41:31,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 17:41:31,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-10 17:41:31,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-10 17:41:31,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=834, Unknown=2, NotChecked=0, Total=930 [2022-01-10 17:41:31,410 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) [2022-01-10 17:41:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:32,970 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-01-10 17:41:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 17:41:32,971 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 [2022-01-10 17:41:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:32,971 INFO L225 Difference]: With dead ends: 42 [2022-01-10 17:41:32,971 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 17:41:32,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=1356, Unknown=2, NotChecked=0, Total=1560 [2022-01-10 17:41:32,973 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 102 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:32,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 72 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 309 Invalid, 0 Unknown, 87 Unchecked, 1.2s Time] [2022-01-10 17:41:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 17:41:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-01-10 17:41:32,977 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) [2022-01-10 17:41:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-10 17:41:32,978 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2022-01-10 17:41:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:32,978 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-10 17:41:32,978 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) [2022-01-10 17:41:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-10 17:41:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 17:41:32,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:32,979 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] [2022-01-10 17:41:32,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 17:41:33,187 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 [2022-01-10 17:41:33,188 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:33,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:33,191 INFO L85 PathProgramCache]: Analyzing trace with hash 691203950, now seen corresponding path program 1 times [2022-01-10 17:41:33,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:33,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731890106] [2022-01-10 17:41:33,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:33,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat