./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/tree-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/heap-manipulation/tree-2.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 ff6ec4010c0396675f743c4c0d5de68176a7292a1f0bcf6c389633f85d936d1a --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 13:46:49,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 13:46:49,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 13:46:49,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 13:46:49,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 13:46:49,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 13:46:49,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 13:46:49,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 13:46:49,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 13:46:50,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 13:46:50,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 13:46:50,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 13:46:50,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 13:46:50,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 13:46:50,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 13:46:50,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 13:46:50,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 13:46:50,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 13:46:50,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 13:46:50,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 13:46:50,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 13:46:50,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 13:46:50,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 13:46:50,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 13:46:50,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 13:46:50,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 13:46:50,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 13:46:50,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 13:46:50,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 13:46:50,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 13:46:50,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 13:46:50,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 13:46:50,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 13:46:50,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 13:46:50,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 13:46:50,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 13:46:50,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 13:46:50,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 13:46:50,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 13:46:50,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 13:46:50,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 13:46:50,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 13:46:50,069 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 13:46:50,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 13:46:50,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 13:46:50,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 13:46:50,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 13:46:50,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 13:46:50,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 13:46:50,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 13:46:50,072 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 13:46:50,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 13:46:50,073 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 13:46:50,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 13:46:50,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 13:46:50,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 13:46:50,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 13:46:50,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 13:46:50,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 13:46:50,074 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 13:46:50,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 13:46:50,075 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 13:46:50,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 13:46:50,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 13:46:50,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 13:46:50,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 13:46:50,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 13:46:50,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 13:46:50,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 13:46:50,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 13:46:50,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 13:46:50,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 13:46:50,077 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 13:46:50,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 13:46:50,078 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 13:46:50,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 13:46:50,078 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 13:46:50,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff6ec4010c0396675f743c4c0d5de68176a7292a1f0bcf6c389633f85d936d1a [2023-02-18 13:46:50,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 13:46:50,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 13:46:50,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 13:46:50,352 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 13:46:50,352 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 13:46:50,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/tree-2.i [2023-02-18 13:46:51,623 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 13:46:51,825 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 13:46:51,826 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/tree-2.i [2023-02-18 13:46:51,835 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d36065348/1d4948bd8cf247a3b485b76c1bf6fc24/FLAG594bc05ef [2023-02-18 13:46:51,846 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d36065348/1d4948bd8cf247a3b485b76c1bf6fc24 [2023-02-18 13:46:51,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 13:46:51,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 13:46:51,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 13:46:51,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 13:46:51,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 13:46:51,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:46:51" (1/1) ... [2023-02-18 13:46:51,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a54525e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:51, skipping insertion in model container [2023-02-18 13:46:51,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:46:51" (1/1) ... [2023-02-18 13:46:51,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 13:46:51,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 13:46:52,171 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/heap-manipulation/tree-2.i[22626,22639] [2023-02-18 13:46:52,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 13:46:52,213 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 13:46:52,246 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/heap-manipulation/tree-2.i[22626,22639] [2023-02-18 13:46:52,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 13:46:52,291 INFO L208 MainTranslator]: Completed translation [2023-02-18 13:46:52,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52 WrapperNode [2023-02-18 13:46:52,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 13:46:52,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 13:46:52,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 13:46:52,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 13:46:52,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52" (1/1) ... [2023-02-18 13:46:52,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52" (1/1) ... [2023-02-18 13:46:52,349 INFO L138 Inliner]: procedures = 122, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 144 [2023-02-18 13:46:52,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 13:46:52,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 13:46:52,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 13:46:52,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 13:46:52,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52" (1/1) ... [2023-02-18 13:46:52,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52" (1/1) ... [2023-02-18 13:46:52,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52" (1/1) ... [2023-02-18 13:46:52,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52" (1/1) ... [2023-02-18 13:46:52,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52" (1/1) ... [2023-02-18 13:46:52,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52" (1/1) ... [2023-02-18 13:46:52,391 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52" (1/1) ... [2023-02-18 13:46:52,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52" (1/1) ... [2023-02-18 13:46:52,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 13:46:52,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 13:46:52,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 13:46:52,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 13:46:52,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52" (1/1) ... [2023-02-18 13:46:52,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 13:46:52,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:46:52,430 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) [2023-02-18 13:46:52,454 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 [2023-02-18 13:46:52,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 13:46:52,469 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-02-18 13:46:52,469 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-02-18 13:46:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 13:46:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 13:46:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 13:46:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 13:46:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 13:46:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 13:46:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 13:46:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 13:46:52,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 13:46:52,600 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 13:46:52,606 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 13:46:52,967 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 13:46:52,972 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 13:46:52,972 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2023-02-18 13:46:52,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:46:52 BoogieIcfgContainer [2023-02-18 13:46:52,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 13:46:52,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 13:46:52,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 13:46:52,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 13:46:52,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 01:46:51" (1/3) ... [2023-02-18 13:46:52,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406a1881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:46:52, skipping insertion in model container [2023-02-18 13:46:52,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:46:52" (2/3) ... [2023-02-18 13:46:52,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406a1881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:46:52, skipping insertion in model container [2023-02-18 13:46:52,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:46:52" (3/3) ... [2023-02-18 13:46:52,980 INFO L112 eAbstractionObserver]: Analyzing ICFG tree-2.i [2023-02-18 13:46:53,001 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 13:46:53,001 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 13:46:53,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 13:46:53,068 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;@294545a2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 13:46:53,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 13:46:53,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 43 states have internal predecessors, (67), 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) [2023-02-18 13:46:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 13:46:53,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:46:53,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:46:53,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:46:53,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:46:53,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1702518859, now seen corresponding path program 1 times [2023-02-18 13:46:53,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:46:53,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908896429] [2023-02-18 13:46:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:46:53,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:46:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:46:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:46:53,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:46:53,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908896429] [2023-02-18 13:46:53,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908896429] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:46:53,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:46:53,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 13:46:53,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342481739] [2023-02-18 13:46:53,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:46:53,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 13:46:53,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:46:53,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 13:46:53,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 13:46:53,259 INFO L87 Difference]: Start difference. First operand has 45 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 43 states have internal predecessors, (67), 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 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 13:46:53,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:46:53,288 INFO L93 Difference]: Finished difference Result 86 states and 143 transitions. [2023-02-18 13:46:53,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 13:46:53,289 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 13:46:53,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:46:53,294 INFO L225 Difference]: With dead ends: 86 [2023-02-18 13:46:53,295 INFO L226 Difference]: Without dead ends: 30 [2023-02-18 13:46:53,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 13:46:53,300 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:46:53,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 13:46:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-18 13:46:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-18 13:46:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 13:46:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-02-18 13:46:53,328 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 10 [2023-02-18 13:46:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:46:53,329 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-02-18 13:46:53,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 13:46:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-02-18 13:46:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 13:46:53,331 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:46:53,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:46:53,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 13:46:53,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:46:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:46:53,333 INFO L85 PathProgramCache]: Analyzing trace with hash -786119434, now seen corresponding path program 1 times [2023-02-18 13:46:53,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:46:53,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123278586] [2023-02-18 13:46:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:46:53,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:46:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:46:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:46:53,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:46:53,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123278586] [2023-02-18 13:46:53,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123278586] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:46:53,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:46:53,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 13:46:53,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760051491] [2023-02-18 13:46:53,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:46:53,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:46:53,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:46:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:46:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 13:46:53,522 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 13:46:53,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:46:53,581 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2023-02-18 13:46:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 13:46:53,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 13:46:53,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:46:53,583 INFO L225 Difference]: With dead ends: 70 [2023-02-18 13:46:53,584 INFO L226 Difference]: Without dead ends: 36 [2023-02-18 13:46:53,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:46:53,589 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:46:53,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 123 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 13:46:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-18 13:46:53,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-02-18 13:46:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 13:46:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-02-18 13:46:53,599 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 11 [2023-02-18 13:46:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:46:53,600 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-02-18 13:46:53,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 13:46:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-02-18 13:46:53,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 13:46:53,602 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:46:53,605 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:46:53,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 13:46:53,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:46:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:46:53,610 INFO L85 PathProgramCache]: Analyzing trace with hash -834601683, now seen corresponding path program 1 times [2023-02-18 13:46:53,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:46:53,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267216527] [2023-02-18 13:46:53,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:46:53,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:46:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:46:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:46:53,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:46:53,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267216527] [2023-02-18 13:46:53,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267216527] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:46:53,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:46:53,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 13:46:53,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630745968] [2023-02-18 13:46:53,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:46:53,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 13:46:53,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:46:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 13:46:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 13:46:53,693 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 13:46:53,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:46:53,743 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2023-02-18 13:46:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 13:46:53,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 13:46:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:46:53,745 INFO L225 Difference]: With dead ends: 57 [2023-02-18 13:46:53,746 INFO L226 Difference]: Without dead ends: 38 [2023-02-18 13:46:53,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 13:46:53,750 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:46:53,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 13:46:53,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-18 13:46:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-02-18 13:46:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 13:46:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-02-18 13:46:53,760 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 17 [2023-02-18 13:46:53,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:46:53,761 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-02-18 13:46:53,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 13:46:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-02-18 13:46:53,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 13:46:53,762 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:46:53,762 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:46:53,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 13:46:53,763 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:46:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:46:53,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1114252575, now seen corresponding path program 1 times [2023-02-18 13:46:53,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:46:53,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648627327] [2023-02-18 13:46:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:46:53,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:46:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:46:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 13:46:54,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:46:54,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648627327] [2023-02-18 13:46:54,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648627327] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:46:54,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:46:54,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:46:54,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632320042] [2023-02-18 13:46:54,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:46:54,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:46:54,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:46:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:46:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:46:54,237 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 13:46:54,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:46:54,375 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2023-02-18 13:46:54,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 13:46:54,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 13:46:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:46:54,377 INFO L225 Difference]: With dead ends: 51 [2023-02-18 13:46:54,377 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 13:46:54,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:46:54,379 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 137 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:46:54,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 59 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 13:46:54,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 13:46:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2023-02-18 13:46:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 13:46:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-02-18 13:46:54,388 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 20 [2023-02-18 13:46:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:46:54,388 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-02-18 13:46:54,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 13:46:54,389 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-02-18 13:46:54,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 13:46:54,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:46:54,389 INFO L195 NwaCegarLoop]: 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, 1] [2023-02-18 13:46:54,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 13:46:54,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:46:54,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:46:54,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1511650973, now seen corresponding path program 1 times [2023-02-18 13:46:54,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:46:54,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215496062] [2023-02-18 13:46:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:46:54,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:46:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:47:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:47:02,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:47:02,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215496062] [2023-02-18 13:47:02,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215496062] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 13:47:02,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415515296] [2023-02-18 13:47:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:47:02,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 13:47:02,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:47:02,325 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) [2023-02-18 13:47:02,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 13:47:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:47:02,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 183 conjunts are in the unsatisfiable core [2023-02-18 13:47:02,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 13:47:02,625 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 [2023-02-18 13:47:02,657 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 11 treesize of output 7 [2023-02-18 13:47:02,662 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 11 treesize of output 7 [2023-02-18 13:47:02,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 13:47:02,667 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 15 treesize of output 19 [2023-02-18 13:47:02,808 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 13:47:02,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 13:47:02,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 35008 treesize of output 22975 [2023-02-18 13:47:02,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 13:47:02,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 13:47:02,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 18852 treesize of output 15318 [2023-02-18 13:47:03,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 13:47:03,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 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 15978 treesize of output 15680 [2023-02-18 13:47:03,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 13:47:03,252 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 13:47:03,253 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 13:47:03,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 13:47:03,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 8 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 34 case distinctions, treesize of input 62744 treesize of output 66265 [2023-02-18 13:47:04,482 INFO L217 Elim1Store]: Index analysis took 247 ms [2023-02-18 13:47:04,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 13:47:04,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 169 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 175 new quantified variables, introduced 1020 case distinctions, treesize of input 197978 treesize of output 2655569 [2023-02-18 13:53:32,997 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 89426 treesize of output 89202 [2023-02-18 14:00:01,990 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 89202 treesize of output 89186