./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/sll2c_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-simple/sll2c_insert_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8eaca07dd267d84d5b5f55ad6096951e873362e33b975be77e0f552bdb4e3bcb --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 23:20:59,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 23:20:59,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 23:20:59,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 23:20:59,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 23:20:59,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 23:20:59,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 23:20:59,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 23:20:59,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 23:20:59,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 23:20:59,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 23:20:59,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 23:20:59,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 23:20:59,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 23:20:59,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 23:20:59,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 23:20:59,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 23:20:59,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 23:20:59,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 23:20:59,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 23:20:59,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 23:20:59,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 23:20:59,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 23:20:59,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 23:20:59,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 23:20:59,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 23:20:59,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 23:20:59,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 23:20:59,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 23:20:59,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 23:20:59,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 23:20:59,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 23:20:59,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 23:20:59,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 23:20:59,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 23:20:59,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 23:20:59,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 23:20:59,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 23:20:59,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 23:20:59,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 23:20:59,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 23:20:59,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 23:20:59,119 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 23:20:59,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 23:20:59,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 23:20:59,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 23:20:59,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 23:20:59,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 23:20:59,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 23:20:59,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 23:20:59,142 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 23:20:59,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 23:20:59,143 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 23:20:59,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 23:20:59,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 23:20:59,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 23:20:59,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 23:20:59,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 23:20:59,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 23:20:59,145 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 23:20:59,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 23:20:59,145 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 23:20:59,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 23:20:59,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 23:20:59,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 23:20:59,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 23:20:59,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 23:20:59,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 23:20:59,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 23:20:59,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 23:20:59,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 23:20:59,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 23:20:59,146 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 23:20:59,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 23:20:59,147 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 23:20:59,147 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 23:20:59,147 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 23:20:59,147 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8eaca07dd267d84d5b5f55ad6096951e873362e33b975be77e0f552bdb4e3bcb [2023-02-17 23:20:59,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 23:20:59,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 23:20:59,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 23:20:59,350 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 23:20:59,350 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 23:20:59,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_insert_equal.i [2023-02-17 23:21:00,327 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 23:21:00,524 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 23:21:00,533 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_insert_equal.i [2023-02-17 23:21:00,542 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/381aadbf5/e210a1bffa2c45039dc484c5669ec5de/FLAG9dd9cc014 [2023-02-17 23:21:00,552 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/381aadbf5/e210a1bffa2c45039dc484c5669ec5de [2023-02-17 23:21:00,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 23:21:00,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 23:21:00,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 23:21:00,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 23:21:00,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 23:21:00,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4087386e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00, skipping insertion in model container [2023-02-17 23:21:00,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 23:21:00,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 23:21:00,772 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_insert_equal.i[24601,24614] [2023-02-17 23:21:00,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 23:21:00,787 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 23:21:00,832 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_insert_equal.i[24601,24614] [2023-02-17 23:21:00,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 23:21:00,863 INFO L208 MainTranslator]: Completed translation [2023-02-17 23:21:00,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00 WrapperNode [2023-02-17 23:21:00,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 23:21:00,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 23:21:00,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 23:21:00,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 23:21:00,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,910 INFO L138 Inliner]: procedures = 127, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 141 [2023-02-17 23:21:00,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 23:21:00,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 23:21:00,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 23:21:00,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 23:21:00,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,948 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 23:21:00,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 23:21:00,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 23:21:00,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 23:21:00,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00" (1/1) ... [2023-02-17 23:21:00,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 23:21:00,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:21:00,980 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) [2023-02-17 23:21:00,986 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 [2023-02-17 23:21:01,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 23:21:01,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 23:21:01,007 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-17 23:21:01,007 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-17 23:21:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 23:21:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 23:21:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 23:21:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 23:21:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 23:21:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 23:21:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 23:21:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 23:21:01,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 23:21:01,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 23:21:01,122 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 23:21:01,123 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 23:21:01,317 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 23:21:01,327 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 23:21:01,327 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-17 23:21:01,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 11:21:01 BoogieIcfgContainer [2023-02-17 23:21:01,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 23:21:01,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 23:21:01,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 23:21:01,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 23:21:01,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 11:21:00" (1/3) ... [2023-02-17 23:21:01,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0d7776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 11:21:01, skipping insertion in model container [2023-02-17 23:21:01,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:21:00" (2/3) ... [2023-02-17 23:21:01,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0d7776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 11:21:01, skipping insertion in model container [2023-02-17 23:21:01,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 11:21:01" (3/3) ... [2023-02-17 23:21:01,334 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_insert_equal.i [2023-02-17 23:21:01,347 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 23:21:01,347 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 23:21:01,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 23:21:01,388 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36e4596b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 23:21:01,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 23:21:01,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 30 states have (on average 1.5) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 23:21:01,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 23:21:01,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:21:01,396 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:21:01,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:21:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:21:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1369192097, now seen corresponding path program 1 times [2023-02-17 23:21:01,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:21:01,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138515617] [2023-02-17 23:21:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:21:01,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:21:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:01,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 23:21:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:01,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 23:21:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 23:21:01,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:21:01,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138515617] [2023-02-17 23:21:01,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138515617] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:21:01,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:21:01,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 23:21:01,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414844561] [2023-02-17 23:21:01,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:21:01,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 23:21:01,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:21:01,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 23:21:01,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 23:21:01,688 INFO L87 Difference]: Start difference. First operand has 36 states, 30 states have (on average 1.5) internal successors, (45), 31 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 23:21:01,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:21:01,737 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2023-02-17 23:21:01,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 23:21:01,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-17 23:21:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:21:01,743 INFO L225 Difference]: With dead ends: 65 [2023-02-17 23:21:01,743 INFO L226 Difference]: Without dead ends: 28 [2023-02-17 23:21:01,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 23:21:01,747 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:21:01,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:21:01,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-17 23:21:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-17 23:21:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 23:21:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-02-17 23:21:01,771 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 25 [2023-02-17 23:21:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:21:01,772 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-02-17 23:21:01,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 23:21:01,772 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-02-17 23:21:01,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 23:21:01,773 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:21:01,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:21:01,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 23:21:01,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:21:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:21:01,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1579482442, now seen corresponding path program 1 times [2023-02-17 23:21:01,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:21:01,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065933681] [2023-02-17 23:21:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:21:01,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:21:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:01,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 23:21:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:01,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 23:21:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 23:21:01,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:21:01,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065933681] [2023-02-17 23:21:01,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065933681] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:21:01,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:21:01,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 23:21:01,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17485881] [2023-02-17 23:21:01,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:21:01,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 23:21:01,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:21:01,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 23:21:01,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 23:21:01,899 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 23:21:01,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:21:01,932 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2023-02-17 23:21:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 23:21:01,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-17 23:21:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:21:01,934 INFO L225 Difference]: With dead ends: 52 [2023-02-17 23:21:01,934 INFO L226 Difference]: Without dead ends: 31 [2023-02-17 23:21:01,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 23:21:01,935 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:21:01,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:21:01,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-17 23:21:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-02-17 23:21:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 23:21:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-02-17 23:21:01,940 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 25 [2023-02-17 23:21:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:21:01,941 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-02-17 23:21:01,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 23:21:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-02-17 23:21:01,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 23:21:01,942 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:21:01,942 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:21:01,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 23:21:01,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:21:01,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:21:01,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1638915570, now seen corresponding path program 1 times [2023-02-17 23:21:01,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:21:01,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364780927] [2023-02-17 23:21:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:21:01,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:21:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:02,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 23:21:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:02,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-17 23:21:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:02,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 23:21:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 23:21:02,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:21:02,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364780927] [2023-02-17 23:21:02,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364780927] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:21:02,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:21:02,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 23:21:02,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131062918] [2023-02-17 23:21:02,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:21:02,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 23:21:02,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:21:02,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 23:21:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 23:21:02,022 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 23:21:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:21:02,055 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2023-02-17 23:21:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 23:21:02,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-02-17 23:21:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:21:02,056 INFO L225 Difference]: With dead ends: 47 [2023-02-17 23:21:02,056 INFO L226 Difference]: Without dead ends: 39 [2023-02-17 23:21:02,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 23:21:02,057 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:21:02,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 87 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:21:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-17 23:21:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2023-02-17 23:21:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 23:21:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-02-17 23:21:02,061 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 33 [2023-02-17 23:21:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:21:02,062 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-02-17 23:21:02,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 23:21:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-02-17 23:21:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 23:21:02,063 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:21:02,063 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:21:02,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 23:21:02,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:21:02,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:21:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash 802467380, now seen corresponding path program 1 times [2023-02-17 23:21:02,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:21:02,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366098317] [2023-02-17 23:21:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:21:02,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:21:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:03,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 23:21:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:03,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-17 23:21:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:03,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 23:21:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 23:21:03,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:21:03,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366098317] [2023-02-17 23:21:03,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366098317] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:21:03,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089987415] [2023-02-17 23:21:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:21:03,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:21:03,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:21:03,607 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) [2023-02-17 23:21:03,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 23:21:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:21:03,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 152 conjunts are in the unsatisfiable core [2023-02-17 23:21:03,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:21:04,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 23:21:04,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-17 23:21:04,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 23:21:04,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:21:04,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-17 23:21:04,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:21:04,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2023-02-17 23:21:04,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-02-17 23:21:04,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 23:21:04,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:21:04,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 89 [2023-02-17 23:21:04,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-17 23:21:04,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-02-17 23:21:04,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-02-17 23:21:04,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 97 [2023-02-17 23:21:04,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:21:04,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 98 [2023-02-17 23:21:04,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:21:04,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 78 [2023-02-17 23:21:04,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-17 23:21:04,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:21:04,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 23:21:04,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:21:04,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 125 [2023-02-17 23:21:04,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:21:04,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:21:04,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 125 treesize of output 157 [2023-02-17 23:21:04,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:21:04,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:21:04,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 106 treesize of output 160 [2023-02-17 23:21:04,928 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:21:04,930 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:21:04,932 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:21:04,934 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:21:04,935 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:21:06,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:21:06,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:21:06,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 3015 treesize of output 2674 [2023-02-17 23:21:06,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:21:06,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:21:06,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 67 select indices, 67 select index equivalence classes, 2 disjoint index pairs (out of 2211 index pairs), introduced 68 new quantified variables, introduced 2274 case distinctions, treesize of input 2602 treesize of output 21497 [2023-02-17 23:21:21,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:21:26,112 INFO L217 Elim1Store]: Index analysis took 14853 ms [2023-02-17 23:21:26,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:21:26,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 67 select indices, 67 select index equivalence classes, 2 disjoint index pairs (out of 2211 index pairs), introduced 67 new quantified variables, introduced 2273 case distinctions, treesize of input 4393 treesize of output 22960 [2023-02-17 23:21:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:21:47,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-02-17 23:22:08,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:22:08,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:22:08,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28