./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/simple-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-properties/simple-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 7a8519f8a7c8757a31f412eb366ebcbc8dd5e899d9ff0dd6bfc4f50c36dfb89b --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 22:35:32,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 22:35:32,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 22:35:32,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 22:35:32,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 22:35:32,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 22:35:32,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 22:35:32,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 22:35:32,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 22:35:32,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 22:35:32,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 22:35:32,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 22:35:32,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 22:35:32,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 22:35:32,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 22:35:32,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 22:35:32,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 22:35:32,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 22:35:32,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 22:35:32,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 22:35:32,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 22:35:32,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 22:35:32,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 22:35:32,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 22:35:33,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 22:35:33,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 22:35:33,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 22:35:33,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 22:35:33,003 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 22:35:33,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 22:35:33,004 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 22:35:33,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 22:35:33,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 22:35:33,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 22:35:33,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 22:35:33,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 22:35:33,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 22:35:33,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 22:35:33,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 22:35:33,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 22:35:33,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 22:35:33,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 22:35:33,036 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 22:35:33,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 22:35:33,037 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 22:35:33,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 22:35:33,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 22:35:33,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 22:35:33,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 22:35:33,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 22:35:33,038 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 22:35:33,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 22:35:33,039 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 22:35:33,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 22:35:33,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 22:35:33,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 22:35:33,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 22:35:33,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 22:35:33,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 22:35:33,040 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 22:35:33,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 22:35:33,040 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 22:35:33,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 22:35:33,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 22:35:33,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 22:35:33,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 22:35:33,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 22:35:33,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 22:35:33,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 22:35:33,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 22:35:33,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 22:35:33,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 22:35:33,042 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 22:35:33,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 22:35:33,043 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 22:35:33,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 22:35:33,043 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 22:35:33,043 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a8519f8a7c8757a31f412eb366ebcbc8dd5e899d9ff0dd6bfc4f50c36dfb89b [2023-02-17 22:35:33,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 22:35:33,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 22:35:33,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 22:35:33,229 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 22:35:33,229 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 22:35:33,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-1.i [2023-02-17 22:35:34,108 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 22:35:34,331 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 22:35:34,333 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-1.i [2023-02-17 22:35:34,340 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/968440889/5681fae8996d4be48e09f28c680bd28d/FLAG742aae234 [2023-02-17 22:35:34,349 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/968440889/5681fae8996d4be48e09f28c680bd28d [2023-02-17 22:35:34,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 22:35:34,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 22:35:34,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 22:35:34,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 22:35:34,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 22:35:34,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58849d79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34, skipping insertion in model container [2023-02-17 22:35:34,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 22:35:34,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 22:35:34,539 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-1.i[23237,23250] [2023-02-17 22:35:34,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 22:35:34,547 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 22:35:34,571 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-1.i[23237,23250] [2023-02-17 22:35:34,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 22:35:34,589 INFO L208 MainTranslator]: Completed translation [2023-02-17 22:35:34,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34 WrapperNode [2023-02-17 22:35:34,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 22:35:34,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 22:35:34,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 22:35:34,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 22:35:34,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,610 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,624 INFO L138 Inliner]: procedures = 124, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2023-02-17 22:35:34,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 22:35:34,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 22:35:34,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 22:35:34,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 22:35:34,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,641 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 22:35:34,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 22:35:34,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 22:35:34,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 22:35:34,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34" (1/1) ... [2023-02-17 22:35:34,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 22:35:34,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:35:34,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 22:35:34,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 22:35:34,703 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-02-17 22:35:34,703 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-02-17 22:35:34,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 22:35:34,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 22:35:34,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 22:35:34,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 22:35:34,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 22:35:34,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 22:35:34,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 22:35:34,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 22:35:34,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 22:35:34,795 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 22:35:34,796 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 22:35:34,856 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-02-17 22:35:34,990 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 22:35:34,994 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 22:35:34,997 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 22:35:34,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:35:34 BoogieIcfgContainer [2023-02-17 22:35:34,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 22:35:35,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 22:35:35,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 22:35:35,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 22:35:35,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 10:35:34" (1/3) ... [2023-02-17 22:35:35,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9d4847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 10:35:35, skipping insertion in model container [2023-02-17 22:35:35,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:34" (2/3) ... [2023-02-17 22:35:35,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9d4847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 10:35:35, skipping insertion in model container [2023-02-17 22:35:35,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:35:34" (3/3) ... [2023-02-17 22:35:35,019 INFO L112 eAbstractionObserver]: Analyzing ICFG simple-1.i [2023-02-17 22:35:35,029 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 22:35:35,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 22:35:35,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 22:35:35,073 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;@5ef73b4b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 22:35:35,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 22:35:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 20 states have internal predecessors, (26), 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) [2023-02-17 22:35:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 22:35:35,080 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:35:35,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:35:35,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:35:35,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:35:35,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2081441033, now seen corresponding path program 1 times [2023-02-17 22:35:35,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:35:35,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836661447] [2023-02-17 22:35:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:35,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:35:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:35,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:35:35,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836661447] [2023-02-17 22:35:35,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836661447] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:35:35,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:35:35,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 22:35:35,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36569837] [2023-02-17 22:35:35,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:35:35,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 22:35:35,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:35:35,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 22:35:35,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 22:35:35,234 INFO L87 Difference]: Start difference. First operand has 22 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 20 states have internal predecessors, (26), 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:35:35,245 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-02-17 22:35:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 22:35:35,246 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 22:35:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:35:35,249 INFO L225 Difference]: With dead ends: 32 [2023-02-17 22:35:35,249 INFO L226 Difference]: Without dead ends: 14 [2023-02-17 22:35:35,251 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 [2023-02-17 22:35:35,253 INFO L413 NwaCegarLoop]: 25 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, 25 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 [2023-02-17 22:35:35,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:35:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-02-17 22:35:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-02-17 22:35:35,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-02-17 22:35:35,273 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2023-02-17 22:35:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:35:35,273 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-02-17 22:35:35,274 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:35,274 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-02-17 22:35:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 22:35:35,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:35:35,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:35:35,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 22:35:35,275 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:35:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:35:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash -342474989, now seen corresponding path program 1 times [2023-02-17 22:35:35,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:35:35,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695788416] [2023-02-17 22:35:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:35,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:35:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:35,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:35:35,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695788416] [2023-02-17 22:35:35,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695788416] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:35:35,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:35:35,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 22:35:35,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896028914] [2023-02-17 22:35:35,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:35:35,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 22:35:35,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:35:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 22:35:35,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:35:35,493 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:35:35,547 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-02-17 22:35:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 22:35:35,548 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 22:35:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:35:35,548 INFO L225 Difference]: With dead ends: 29 [2023-02-17 22:35:35,548 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 22:35:35,549 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 [2023-02-17 22:35:35,550 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:35:35,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:35:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 22:35:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-02-17 22:35:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-02-17 22:35:35,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2023-02-17 22:35:35,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:35:35,554 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-02-17 22:35:35,554 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:35,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-02-17 22:35:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 22:35:35,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:35:35,555 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:35:35,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 22:35:35,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:35:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:35:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2120256963, now seen corresponding path program 1 times [2023-02-17 22:35:35,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:35:35,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865435153] [2023-02-17 22:35:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:35:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:35,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:35:35,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865435153] [2023-02-17 22:35:35,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865435153] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:35:35,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911847568] [2023-02-17 22:35:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:35,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:35:35,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:35:35,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 22:35:35,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 22:35:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:35,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 22:35:35,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:35:35,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 22:35:35,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 22:35:35,909 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 38 treesize of output 26 [2023-02-17 22:35:35,912 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 32 treesize of output 20 [2023-02-17 22:35:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:35,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:35:35,944 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 35 treesize of output 29 [2023-02-17 22:35:35,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:35,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:35,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911847568] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:35:35,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:35:35,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 8 [2023-02-17 22:35:35,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887747227] [2023-02-17 22:35:35,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:35:35,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 22:35:35,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:35:35,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 22:35:35,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-17 22:35:35,965 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:35:36,019 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-02-17 22:35:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 22:35:36,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-17 22:35:36,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:35:36,021 INFO L225 Difference]: With dead ends: 33 [2023-02-17 22:35:36,021 INFO L226 Difference]: Without dead ends: 23 [2023-02-17 22:35:36,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-17 22:35:36,023 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:35:36,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 37 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:35:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-17 22:35:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2023-02-17 22:35:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-02-17 22:35:36,029 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2023-02-17 22:35:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:35:36,029 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-02-17 22:35:36,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:36,029 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-02-17 22:35:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 22:35:36,030 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:35:36,030 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:35:36,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 22:35:36,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:35:36,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:35:36,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:35:36,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2147109766, now seen corresponding path program 1 times [2023-02-17 22:35:36,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:35:36,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818330849] [2023-02-17 22:35:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:36,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:35:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-17 22:35:36,250 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-17 22:35:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-17 22:35:36,268 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-17 22:35:36,268 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-17 22:35:36,269 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-17 22:35:36,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 22:35:36,272 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-02-17 22:35:36,274 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-17 22:35:36,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.02 10:35:36 BoogieIcfgContainer [2023-02-17 22:35:36,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-17 22:35:36,288 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-17 22:35:36,288 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-17 22:35:36,288 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-17 22:35:36,288 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:35:34" (3/4) ... [2023-02-17 22:35:36,289 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-17 22:35:36,310 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-17 22:35:36,310 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-17 22:35:36,311 INFO L158 Benchmark]: Toolchain (without parser) took 1959.37ms. Allocated memory is still 134.2MB. Free memory was 97.2MB in the beginning and 48.6MB in the end (delta: 48.6MB). Peak memory consumption was 50.7MB. Max. memory is 16.1GB. [2023-02-17 22:35:36,311 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 104.9MB. Free memory is still 53.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 22:35:36,311 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.68ms. Allocated memory is still 134.2MB. Free memory was 97.2MB in the beginning and 80.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-02-17 22:35:36,311 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.99ms. Allocated memory is still 134.2MB. Free memory was 80.4MB in the beginning and 78.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 22:35:36,312 INFO L158 Benchmark]: Boogie Preprocessor took 18.22ms. Allocated memory is still 134.2MB. Free memory was 78.8MB in the beginning and 77.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 22:35:36,312 INFO L158 Benchmark]: RCFGBuilder took 368.95ms. Allocated memory is still 134.2MB. Free memory was 77.4MB in the beginning and 65.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-17 22:35:36,312 INFO L158 Benchmark]: TraceAbstraction took 1273.41ms. Allocated memory is still 134.2MB. Free memory was 64.5MB in the beginning and 50.7MB in the end (delta: 13.8MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. [2023-02-17 22:35:36,312 INFO L158 Benchmark]: Witness Printer took 22.70ms. Allocated memory is still 134.2MB. Free memory was 50.7MB in the beginning and 48.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 22:35:36,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 104.9MB. Free memory is still 53.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.68ms. Allocated memory is still 134.2MB. Free memory was 97.2MB in the beginning and 80.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.99ms. Allocated memory is still 134.2MB. Free memory was 80.4MB in the beginning and 78.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.22ms. Allocated memory is still 134.2MB. Free memory was 78.8MB in the beginning and 77.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 368.95ms. Allocated memory is still 134.2MB. Free memory was 77.4MB in the beginning and 65.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1273.41ms. Allocated memory is still 134.2MB. Free memory was 64.5MB in the beginning and 50.7MB in the end (delta: 13.8MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. * Witness Printer took 22.70ms. Allocated memory is still 134.2MB. Free memory was 50.7MB in the beginning and 48.6MB in the end (delta: 2.1MB). 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: 549]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; [L536] a->h = 2 VAL [a={-1:0}, p={-1:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] p->h = 1 [L539] t = (List) malloc(sizeof(struct node)) [L540] COND FALSE !(t == 0) VAL [a={-1:0}, p={-1:0}, t={-2:0}] [L541] p->n = t [L542] EXPR p->n [L542] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L544] p->h = 2 [L545] p->n = 0 [L546] p = a VAL [a={-1:0}, p={-1:0}, t={-2:0}] [L547] COND TRUE p!=0 [L548] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=1, t={-2:0}] [L548] COND TRUE p->h != 2 [L549] reach_error() VAL [a={-1:0}, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.2s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51 mSDsluCounter, 98 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 54 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 67 IncrementalHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 44 mSDtfsCounter, 67 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 53 ConstructedInterpolants, 0 QuantifiedInterpolants, 429 SizeOfPredicates, 6 NumberOfNonLiveVariables, 94 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/6 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! [2023-02-17 22:35:36,327 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