./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/sll_to_dll_rev-1.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 f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 00:48:26,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 00:48:26,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 00:48:26,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 00:48:26,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 00:48:26,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 00:48:26,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 00:48:27,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 00:48:27,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 00:48:27,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 00:48:27,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 00:48:27,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 00:48:27,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 00:48:27,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 00:48:27,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 00:48:27,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 00:48:27,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 00:48:27,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 00:48:27,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 00:48:27,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 00:48:27,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 00:48:27,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 00:48:27,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 00:48:27,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 00:48:27,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 00:48:27,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 00:48:27,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 00:48:27,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 00:48:27,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 00:48:27,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 00:48:27,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 00:48:27,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 00:48:27,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 00:48:27,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 00:48:27,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 00:48:27,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 00:48:27,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 00:48:27,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 00:48:27,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 00:48:27,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 00:48:27,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 00:48:27,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 00:48:27,085 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 00:48:27,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 00:48:27,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 00:48:27,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 00:48:27,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 00:48:27,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 00:48:27,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 00:48:27,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 00:48:27,088 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 00:48:27,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 00:48:27,089 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 00:48:27,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 00:48:27,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 00:48:27,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 00:48:27,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 00:48:27,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 00:48:27,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 00:48:27,091 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 00:48:27,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 00:48:27,091 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 00:48:27,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 00:48:27,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 00:48:27,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 00:48:27,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 00:48:27,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:48:27,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 00:48:27,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 00:48:27,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 00:48:27,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 00:48:27,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 00:48:27,094 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 00:48:27,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 00:48:27,094 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 00:48:27,094 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 00:48:27,094 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 00:48:27,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2023-02-16 00:48:27,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 00:48:27,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 00:48:27,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 00:48:27,364 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 00:48:27,364 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 00:48:27,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2023-02-16 00:48:28,549 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 00:48:28,843 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 00:48:28,843 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2023-02-16 00:48:28,856 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41c56d8f0/6f5ea035c78b432cb2408ca5551f810d/FLAG9df5b8d44 [2023-02-16 00:48:28,868 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41c56d8f0/6f5ea035c78b432cb2408ca5551f810d [2023-02-16 00:48:28,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 00:48:28,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 00:48:28,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 00:48:28,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 00:48:28,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 00:48:28,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:48:28" (1/1) ... [2023-02-16 00:48:28,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71af3130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:28, skipping insertion in model container [2023-02-16 00:48:28,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:48:28" (1/1) ... [2023-02-16 00:48:28,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 00:48:28,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 00:48:29,144 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/sll_to_dll_rev-1.i[22636,22649] [2023-02-16 00:48:29,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:48:29,184 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 00:48:29,209 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/sll_to_dll_rev-1.i[22636,22649] [2023-02-16 00:48:29,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:48:29,246 INFO L208 MainTranslator]: Completed translation [2023-02-16 00:48:29,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29 WrapperNode [2023-02-16 00:48:29,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 00:48:29,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 00:48:29,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 00:48:29,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 00:48:29,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29" (1/1) ... [2023-02-16 00:48:29,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29" (1/1) ... [2023-02-16 00:48:29,297 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2023-02-16 00:48:29,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 00:48:29,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 00:48:29,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 00:48:29,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 00:48:29,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29" (1/1) ... [2023-02-16 00:48:29,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29" (1/1) ... [2023-02-16 00:48:29,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29" (1/1) ... [2023-02-16 00:48:29,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29" (1/1) ... [2023-02-16 00:48:29,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29" (1/1) ... [2023-02-16 00:48:29,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29" (1/1) ... [2023-02-16 00:48:29,326 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29" (1/1) ... [2023-02-16 00:48:29,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29" (1/1) ... [2023-02-16 00:48:29,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 00:48:29,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 00:48:29,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 00:48:29,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 00:48:29,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29" (1/1) ... [2023-02-16 00:48:29,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:48:29,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:48:29,366 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) [2023-02-16 00:48:29,379 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 [2023-02-16 00:48:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-02-16 00:48:29,401 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-02-16 00:48:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 00:48:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 00:48:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 00:48:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-16 00:48:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-16 00:48:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2023-02-16 00:48:29,402 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2023-02-16 00:48:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 00:48:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-16 00:48:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2023-02-16 00:48:29,403 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2023-02-16 00:48:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 00:48:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2023-02-16 00:48:29,403 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2023-02-16 00:48:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 00:48:29,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 00:48:29,532 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 00:48:29,534 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 00:48:29,911 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 00:48:29,939 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 00:48:29,939 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2023-02-16 00:48:29,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:48:29 BoogieIcfgContainer [2023-02-16 00:48:29,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 00:48:29,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 00:48:29,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 00:48:29,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 00:48:29,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 12:48:28" (1/3) ... [2023-02-16 00:48:29,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727cc284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:48:29, skipping insertion in model container [2023-02-16 00:48:29,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:48:29" (2/3) ... [2023-02-16 00:48:29,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727cc284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:48:29, skipping insertion in model container [2023-02-16 00:48:29,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:48:29" (3/3) ... [2023-02-16 00:48:29,950 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2023-02-16 00:48:29,985 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 00:48:29,986 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 00:48:30,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 00:48:30,046 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;@195a3cf7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 00:48:30,047 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 00:48:30,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 75 states have (on average 1.68) internal successors, (126), 83 states have internal predecessors, (126), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-16 00:48:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 00:48:30,060 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:48:30,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:48:30,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:48:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:48:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1660370747, now seen corresponding path program 1 times [2023-02-16 00:48:30,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:48:30,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783894796] [2023-02-16 00:48:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:48:30,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:48:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:48:30,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:48:30,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783894796] [2023-02-16 00:48:30,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783894796] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:48:30,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:48:30,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 00:48:30,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869064339] [2023-02-16 00:48:30,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:48:30,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 00:48:30,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:48:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 00:48:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:48:30,315 INFO L87 Difference]: Start difference. First operand has 96 states, 75 states have (on average 1.68) internal successors, (126), 83 states have internal predecessors, (126), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 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) [2023-02-16 00:48:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:48:30,352 INFO L93 Difference]: Finished difference Result 188 states and 326 transitions. [2023-02-16 00:48:30,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 00:48:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 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) Word has length 16 [2023-02-16 00:48:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:48:30,361 INFO L225 Difference]: With dead ends: 188 [2023-02-16 00:48:30,361 INFO L226 Difference]: Without dead ends: 88 [2023-02-16 00:48:30,365 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 [2023-02-16 00:48:30,367 INFO L413 NwaCegarLoop]: 115 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, 115 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 [2023-02-16 00:48:30,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:48:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-16 00:48:30,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-02-16 00:48:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 76 states have internal predecessors, (83), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 00:48:30,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2023-02-16 00:48:30,407 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 16 [2023-02-16 00:48:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:48:30,407 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2023-02-16 00:48:30,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 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) [2023-02-16 00:48:30,408 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2023-02-16 00:48:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-16 00:48:30,410 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:48:30,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:48:30,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 00:48:30,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:48:30,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:48:30,411 INFO L85 PathProgramCache]: Analyzing trace with hash -871113262, now seen corresponding path program 1 times [2023-02-16 00:48:30,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:48:30,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955547569] [2023-02-16 00:48:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:48:30,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:48:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:31,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:48:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:31,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-16 00:48:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 00:48:32,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:48:32,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955547569] [2023-02-16 00:48:32,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955547569] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:48:32,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128491675] [2023-02-16 00:48:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:48:32,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:48:32,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:48:32,269 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) [2023-02-16 00:48:32,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 00:48:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:32,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-16 00:48:32,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:48:32,650 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-16 00:48:32,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-16 00:48:32,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:48:32,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:48:32,742 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-16 00:48:32,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 34 [2023-02-16 00:48:32,745 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 22 treesize of output 16 [2023-02-16 00:48:33,137 INFO L321 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2023-02-16 00:48:33,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 121 [2023-02-16 00:48:33,152 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 9 treesize of output 7 [2023-02-16 00:48:33,166 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 00:48:33,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:48:33,297 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 00:48:33,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 19 [2023-02-16 00:48:33,359 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 00:48:33,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 8 [2023-02-16 00:48:33,483 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_245 (Array Int Int)) (v_ArrVal_244 (Array Int Int))) (and (not (= 0 |chain_node_~node~0#1.base|)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_244) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_245) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))))) is different from true [2023-02-16 00:48:33,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:48:33,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:48:33,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:48:33,533 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-02-16 00:48:33,533 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 2 case distinctions, treesize of input 34 treesize of output 44 [2023-02-16 00:48:33,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 [2023-02-16 00:48:33,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-16 00:48:33,578 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 00:48:33,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 00:48:33,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 30 [2023-02-16 00:48:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-16 00:48:33,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:48:33,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128491675] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:48:33,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:48:33,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2023-02-16 00:48:33,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978752672] [2023-02-16 00:48:33,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:48:33,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 00:48:33,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:48:33,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 00:48:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=622, Unknown=5, NotChecked=50, Total=756 [2023-02-16 00:48:33,913 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 27 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 24 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 00:48:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:48:35,601 INFO L93 Difference]: Finished difference Result 136 states and 169 transitions. [2023-02-16 00:48:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 00:48:35,603 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 24 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2023-02-16 00:48:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:48:35,606 INFO L225 Difference]: With dead ends: 136 [2023-02-16 00:48:35,606 INFO L226 Difference]: Without dead ends: 133 [2023-02-16 00:48:35,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=175, Invalid=1299, Unknown=12, NotChecked=74, Total=1560 [2023-02-16 00:48:35,608 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 208 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 74 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:48:35,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 631 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1237 Invalid, 13 Unknown, 148 Unchecked, 1.1s Time] [2023-02-16 00:48:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-16 00:48:35,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 100. [2023-02-16 00:48:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 87 states have internal predecessors, (97), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 00:48:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2023-02-16 00:48:35,648 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 33 [2023-02-16 00:48:35,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:48:35,649 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2023-02-16 00:48:35,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 24 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 00:48:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2023-02-16 00:48:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-16 00:48:35,651 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:48:35,651 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:48:35,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 00:48:35,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:48:35,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:48:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:48:35,858 INFO L85 PathProgramCache]: Analyzing trace with hash 371633244, now seen corresponding path program 1 times [2023-02-16 00:48:35,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:48:35,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548419627] [2023-02-16 00:48:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:48:35,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:48:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:36,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:48:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:37,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-16 00:48:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 00:48:37,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:48:37,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548419627] [2023-02-16 00:48:37,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548419627] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:48:37,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570116893] [2023-02-16 00:48:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:48:37,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:48:37,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:48:37,997 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:48:38,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 00:48:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:38,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-16 00:48:38,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:48:38,158 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 10 treesize of output 8 [2023-02-16 00:48:38,275 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-16 00:48:38,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-16 00:48:38,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:48:38,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:48:38,337 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-16 00:48:38,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 34 [2023-02-16 00:48:38,341 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 22 treesize of output 16 [2023-02-16 00:48:38,677 INFO L321 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2023-02-16 00:48:38,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 121 [2023-02-16 00:48:38,696 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 9 treesize of output 7 [2023-02-16 00:48:38,707 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 00:48:38,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:48:38,810 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-02-16 00:48:38,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2023-02-16 00:48:38,821 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 16 treesize of output 12 [2023-02-16 00:48:38,893 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 8 treesize of output 4 [2023-02-16 00:48:39,043 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_483 (Array Int Int)) (v_ArrVal_482 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_482) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_483) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))) (not (= 0 |chain_node_~node~0#1.base|)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-16 00:48:39,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:48:39,101 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2023-02-16 00:48:39,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 97 [2023-02-16 00:48:39,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:48:39,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:48:39,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 36 treesize of output 36 [2023-02-16 00:48:39,149 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 00:48:39,176 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:48:39,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 50 [2023-02-16 00:48:39,183 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 9 treesize of output 7 [2023-02-16 00:48:39,186 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 00:48:39,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 00:48:39,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 25 [2023-02-16 00:48:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-16 00:48:39,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:48:39,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570116893] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:48:39,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:48:39,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2023-02-16 00:48:39,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60014527] [2023-02-16 00:48:39,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:48:39,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 00:48:39,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:48:39,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 00:48:39,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=974, Unknown=4, NotChecked=62, Total=1122 [2023-02-16 00:48:39,646 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand has 32 states, 26 states have (on average 2.076923076923077) internal successors, (54), 28 states have internal predecessors, (54), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 00:48:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:48:43,132 INFO L93 Difference]: Finished difference Result 186 states and 233 transitions. [2023-02-16 00:48:43,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-16 00:48:43,133 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 2.076923076923077) internal successors, (54), 28 states have internal predecessors, (54), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2023-02-16 00:48:43,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:48:43,135 INFO L225 Difference]: With dead ends: 186 [2023-02-16 00:48:43,135 INFO L226 Difference]: Without dead ends: 183 [2023-02-16 00:48:43,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=255, Invalid=2393, Unknown=8, NotChecked=100, Total=2756 [2023-02-16 00:48:43,137 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 273 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 80 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:48:43,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1017 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2342 Invalid, 16 Unknown, 154 Unchecked, 2.1s Time] [2023-02-16 00:48:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-02-16 00:48:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 100. [2023-02-16 00:48:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 87 states have internal predecessors, (96), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 00:48:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2023-02-16 00:48:43,169 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 35 [2023-02-16 00:48:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:48:43,169 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2023-02-16 00:48:43,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 2.076923076923077) internal successors, (54), 28 states have internal predecessors, (54), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 00:48:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2023-02-16 00:48:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-16 00:48:43,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:48:43,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:48:43,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 00:48:43,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-16 00:48:43,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:48:43,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:48:43,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1899770360, now seen corresponding path program 1 times [2023-02-16 00:48:43,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:48:43,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999396540] [2023-02-16 00:48:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:48:43,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:48:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 00:48:43,454 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-16 00:48:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 00:48:43,507 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-16 00:48:43,508 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-16 00:48:43,509 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-16 00:48:43,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 00:48:43,517 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-02-16 00:48:43,520 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-16 00:48:43,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 12:48:43 BoogieIcfgContainer [2023-02-16 00:48:43,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-16 00:48:43,565 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-16 00:48:43,565 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-16 00:48:43,565 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-16 00:48:43,565 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:48:29" (3/4) ... [2023-02-16 00:48:43,567 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-16 00:48:43,605 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-16 00:48:43,606 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-16 00:48:43,606 INFO L158 Benchmark]: Toolchain (without parser) took 14734.94ms. Allocated memory was 157.3MB in the beginning and 234.9MB in the end (delta: 77.6MB). Free memory was 123.0MB in the beginning and 145.3MB in the end (delta: -22.3MB). Peak memory consumption was 57.4MB. Max. memory is 16.1GB. [2023-02-16 00:48:43,607 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 157.3MB. Free memory is still 101.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 00:48:43,607 INFO L158 Benchmark]: CACSL2BoogieTranslator took 375.10ms. Allocated memory is still 157.3MB. Free memory was 123.0MB in the beginning and 104.9MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-02-16 00:48:43,607 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.19ms. Allocated memory is still 157.3MB. Free memory was 104.9MB in the beginning and 102.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 00:48:43,607 INFO L158 Benchmark]: Boogie Preprocessor took 32.98ms. Allocated memory is still 157.3MB. Free memory was 102.3MB in the beginning and 100.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 00:48:43,608 INFO L158 Benchmark]: RCFGBuilder took 610.12ms. Allocated memory was 157.3MB in the beginning and 190.8MB in the end (delta: 33.6MB). Free memory was 100.0MB in the beginning and 158.1MB in the end (delta: -58.1MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. [2023-02-16 00:48:43,608 INFO L158 Benchmark]: TraceAbstraction took 13620.74ms. Allocated memory was 190.8MB in the beginning and 234.9MB in the end (delta: 44.0MB). Free memory was 157.4MB in the beginning and 148.4MB in the end (delta: 9.0MB). Peak memory consumption was 52.9MB. Max. memory is 16.1GB. [2023-02-16 00:48:43,608 INFO L158 Benchmark]: Witness Printer took 41.33ms. Allocated memory is still 234.9MB. Free memory was 148.4MB in the beginning and 145.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 00:48:43,610 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 157.3MB. Free memory is still 101.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 375.10ms. Allocated memory is still 157.3MB. Free memory was 123.0MB in the beginning and 104.9MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.19ms. Allocated memory is still 157.3MB. Free memory was 104.9MB in the beginning and 102.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.98ms. Allocated memory is still 157.3MB. Free memory was 102.3MB in the beginning and 100.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 610.12ms. Allocated memory was 157.3MB in the beginning and 190.8MB in the end (delta: 33.6MB). Free memory was 100.0MB in the beginning and 158.1MB in the end (delta: -58.1MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. * TraceAbstraction took 13620.74ms. Allocated memory was 190.8MB in the beginning and 234.9MB in the end (delta: 44.0MB). Free memory was 157.4MB in the beginning and 148.4MB in the end (delta: 9.0MB). Peak memory consumption was 52.9MB. Max. memory is 16.1GB. * Witness Printer took 41.33ms. Allocated memory is still 234.9MB. Free memory was 148.4MB in the beginning and 145.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L640] CALL, EXPR create_sll(&p1, &p2) [L588] struct node *list = ((void *)0); VAL [list={6:0}, pp1={7:0}, pp1={7:0}, pp2={5:0}, pp2={5:0}] [L590] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) VAL [ptr={-1:0}] [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; VAL [\result={-1:0}, ptr={-1:0}] [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node VAL [node={-1:0}, ppnode={6:0}, ppnode={6:0}] [L590] RET chain_node(&list) VAL [list={6:0}, pp1={7:0}, pp1={7:0}, pp2={5:0}, pp2={5:0}] [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L597] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) VAL [ptr={3:0}] [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; VAL [\result={3:0}, ptr={3:0}] [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node VAL [node={3:0}, ppnode={6:0}, ppnode={6:0}] [L597] RET chain_node(&list) VAL [list={6:0}, pp1={7:0}, pp1={7:0}, pp2={5:0}, pp2={5:0}] [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; VAL [\result={3:0}, pp1={7:0}, pp1={7:0}, pp2={5:0}, pp2={5:0}] [L640] RET, EXPR create_sll(&p1, &p2) [L640] struct node *list = create_sll(&p1, &p2); [L642] EXPR \read(*p1) [L642] EXPR \read(*p2) VAL [\read(*p1)={-1:0}, \read(*p2)={-1:0}, list={3:0}, p1={7:0}, p2={5:0}] [L642] CALL check_seq_next(p1, p2) VAL [beg={-1:0}, end={-1:0}] [L626] COND FALSE !(!(beg)) VAL [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L627] COND FALSE !(!(end)) VAL [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg VAL [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}] [L629] COND TRUE !(beg) VAL [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}] [L629] CALL fail() [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.5s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 mSolverCounterUnknown, 489 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 481 mSDsluCounter, 1763 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 302 IncrementalHoareTripleChecker+Unchecked, 1538 mSDsCounter, 154 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3579 IncrementalHoareTripleChecker+Invalid, 4064 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 154 mSolverCounterUnsat, 225 mSDtfsCounter, 3579 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=2, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 116 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 147 ConstructedInterpolants, 28 QuantifiedInterpolants, 5339 SizeOfPredicates, 51 NumberOfNonLiveVariables, 680 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 10/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-16 00:48:43,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE