./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 e8d55036 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-?-e8d5503-m [2023-02-15 19:28:24,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 19:28:24,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 19:28:24,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 19:28:24,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 19:28:24,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 19:28:24,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 19:28:24,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 19:28:24,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 19:28:24,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 19:28:24,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 19:28:24,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 19:28:24,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 19:28:24,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 19:28:24,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 19:28:24,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 19:28:24,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 19:28:24,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 19:28:24,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 19:28:24,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 19:28:24,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 19:28:24,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 19:28:24,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 19:28:24,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 19:28:24,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 19:28:24,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 19:28:24,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 19:28:24,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 19:28:24,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 19:28:24,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 19:28:24,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 19:28:24,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 19:28:24,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 19:28:24,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 19:28:24,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 19:28:24,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 19:28:24,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 19:28:24,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 19:28:24,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 19:28:24,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 19:28:24,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 19:28:24,634 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 19:28:24,663 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 19:28:24,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 19:28:24,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 19:28:24,671 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 19:28:24,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 19:28:24,672 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 19:28:24,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 19:28:24,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 19:28:24,673 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 19:28:24,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 19:28:24,674 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 19:28:24,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 19:28:24,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 19:28:24,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 19:28:24,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 19:28:24,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 19:28:24,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 19:28:24,676 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 19:28:24,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 19:28:24,676 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 19:28:24,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 19:28:24,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 19:28:24,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 19:28:24,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 19:28:24,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:28:24,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 19:28:24,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 19:28:24,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 19:28:24,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 19:28:24,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 19:28:24,678 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 19:28:24,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 19:28:24,679 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 19:28:24,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 19:28:24,679 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 19:28:24,680 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2023-02-15 19:28:24,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 19:28:24,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 19:28:24,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 19:28:24,957 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 19:28:24,957 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 19:28:24,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2023-02-15 19:28:26,107 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 19:28:26,346 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 19:28:26,347 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2023-02-15 19:28:26,359 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ecaf695d/05f94bc44dee4c58b0074c1c0aa4cf76/FLAGa8445673b [2023-02-15 19:28:26,377 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ecaf695d/05f94bc44dee4c58b0074c1c0aa4cf76 [2023-02-15 19:28:26,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 19:28:26,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 19:28:26,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 19:28:26,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 19:28:26,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 19:28:26,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ec2d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26, skipping insertion in model container [2023-02-15 19:28:26,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 19:28:26,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 19:28:26,663 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] [2023-02-15 19:28:26,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:28:26,700 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 19:28:26,732 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] [2023-02-15 19:28:26,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:28:26,779 INFO L208 MainTranslator]: Completed translation [2023-02-15 19:28:26,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26 WrapperNode [2023-02-15 19:28:26,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 19:28:26,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 19:28:26,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 19:28:26,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 19:28:26,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,822 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2023-02-15 19:28:26,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 19:28:26,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 19:28:26,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 19:28:26,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 19:28:26,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,858 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 19:28:26,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 19:28:26,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 19:28:26,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 19:28:26,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26" (1/1) ... [2023-02-15 19:28:26,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:28:26,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:28:26,897 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) [2023-02-15 19:28:26,921 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 [2023-02-15 19:28:26,938 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-02-15 19:28:26,938 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-02-15 19:28:26,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 19:28:26,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 19:28:26,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 19:28:26,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 19:28:26,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 19:28:26,941 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2023-02-15 19:28:26,941 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2023-02-15 19:28:26,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 19:28:26,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 19:28:26,941 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2023-02-15 19:28:26,941 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2023-02-15 19:28:26,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 19:28:26,942 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2023-02-15 19:28:26,942 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2023-02-15 19:28:26,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 19:28:26,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 19:28:27,129 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 19:28:27,131 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 19:28:27,445 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 19:28:27,452 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 19:28:27,452 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2023-02-15 19:28:27,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:28:27 BoogieIcfgContainer [2023-02-15 19:28:27,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 19:28:27,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 19:28:27,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 19:28:27,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 19:28:27,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 07:28:26" (1/3) ... [2023-02-15 19:28:27,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348d7221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:28:27, skipping insertion in model container [2023-02-15 19:28:27,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:28:26" (2/3) ... [2023-02-15 19:28:27,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348d7221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:28:27, skipping insertion in model container [2023-02-15 19:28:27,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:28:27" (3/3) ... [2023-02-15 19:28:27,462 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2023-02-15 19:28:27,477 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 19:28:27,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 19:28:27,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 19:28:27,525 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;@51230c44, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 19:28:27,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 19:28:27,531 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) [2023-02-15 19:28:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 19:28:27,539 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:27,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:28:27,541 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:27,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:27,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1660370747, now seen corresponding path program 1 times [2023-02-15 19:28:27,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:27,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38266576] [2023-02-15 19:28:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:27,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:28:27,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:28:27,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38266576] [2023-02-15 19:28:27,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38266576] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:28:27,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:28:27,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 19:28:27,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745145727] [2023-02-15 19:28:27,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:28:27,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 19:28:27,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:28:27,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 19:28:27,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 19:28:27,776 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) [2023-02-15 19:28:27,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:28:27,807 INFO L93 Difference]: Finished difference Result 188 states and 326 transitions. [2023-02-15 19:28:27,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 19:28:27,810 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 [2023-02-15 19:28:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:28:27,816 INFO L225 Difference]: With dead ends: 188 [2023-02-15 19:28:27,817 INFO L226 Difference]: Without dead ends: 88 [2023-02-15 19:28:27,820 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 [2023-02-15 19:28:27,823 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 [2023-02-15 19:28:27,824 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] [2023-02-15 19:28:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-15 19:28:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-02-15 19:28:27,854 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) [2023-02-15 19:28:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2023-02-15 19:28:27,858 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 16 [2023-02-15 19:28:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:28:27,859 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2023-02-15 19:28:27,859 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) [2023-02-15 19:28:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2023-02-15 19:28:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 19:28:27,861 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:27,861 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] [2023-02-15 19:28:27,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 19:28:27,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:27,862 INFO L85 PathProgramCache]: Analyzing trace with hash -871113262, now seen corresponding path program 1 times [2023-02-15 19:28:27,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:27,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492829211] [2023-02-15 19:28:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:27,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:29,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:28:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:29,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-15 19:28:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 19:28:29,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:28:29,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492829211] [2023-02-15 19:28:29,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492829211] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:28:29,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133039615] [2023-02-15 19:28:29,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:29,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:28:29,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:28:29,869 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) [2023-02-15 19:28:29,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 19:28:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:30,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-15 19:28:30,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:28:30,235 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 19:28:30,240 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 [2023-02-15 19:28:30,252 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 [2023-02-15 19:28:30,267 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 [2023-02-15 19:28:30,357 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-15 19:28:30,358 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 [2023-02-15 19:28:30,362 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 [2023-02-15 19:28:30,514 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-15 19:28:30,515 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 [2023-02-15 19:28:30,647 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-02-15 19:28:30,648 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 29 [2023-02-15 19:28:30,722 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-15 19:28:30,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 11 [2023-02-15 19:28:30,857 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 [2023-02-15 19:28:30,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:28:30,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:28:30,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:28:30,927 INFO L321 Elim1Store]: treesize reduction 47, result has 44.7 percent of original size [2023-02-15 19:28:30,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 71 [2023-02-15 19:28:30,944 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 14 treesize of output 10 [2023-02-15 19:28:30,963 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 22 treesize of output 17 [2023-02-15 19:28:30,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:28:30,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-02-15 19:28:31,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:28:31,150 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 [2023-02-15 19:28:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-15 19:28:31,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:28:31,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133039615] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:28:31,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:28:31,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2023-02-15 19:28:31,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296879001] [2023-02-15 19:28:31,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:28:31,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 19:28:31,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:28:31,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 19:28:31,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=576, Unknown=2, NotChecked=48, Total=702 [2023-02-15 19:28:31,316 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 26 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 19:28:32,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:28:32,767 INFO L93 Difference]: Finished difference Result 132 states and 163 transitions. [2023-02-15 19:28:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 19:28:32,768 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2023-02-15 19:28:32,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:28:32,771 INFO L225 Difference]: With dead ends: 132 [2023-02-15 19:28:32,771 INFO L226 Difference]: Without dead ends: 129 [2023-02-15 19:28:32,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=163, Invalid=1171, Unknown=2, NotChecked=70, Total=1406 [2023-02-15 19:28:32,774 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 137 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:28:32,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 622 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1244 Invalid, 0 Unknown, 151 Unchecked, 1.0s Time] [2023-02-15 19:28:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-15 19:28:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2023-02-15 19:28:32,793 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) [2023-02-15 19:28:32,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2023-02-15 19:28:32,800 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 33 [2023-02-15 19:28:32,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:28:32,801 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2023-02-15 19:28:32,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 19:28:32,802 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2023-02-15 19:28:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 19:28:32,804 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:32,804 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] [2023-02-15 19:28:32,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 19:28:33,016 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 [2023-02-15 19:28:33,017 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:33,018 INFO L85 PathProgramCache]: Analyzing trace with hash 371633244, now seen corresponding path program 1 times [2023-02-15 19:28:33,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:33,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815350892] [2023-02-15 19:28:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:33,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:34,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:28:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:34,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-15 19:28:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 19:28:35,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:28:35,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815350892] [2023-02-15 19:28:35,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815350892] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:28:35,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467999078] [2023-02-15 19:28:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:35,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:28:35,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:28:35,041 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) [2023-02-15 19:28:35,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 19:28:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:35,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-15 19:28:35,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:28:35,195 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 [2023-02-15 19:28:35,327 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 19:28:35,327 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 [2023-02-15 19:28:35,332 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 [2023-02-15 19:28:35,338 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 [2023-02-15 19:28:35,370 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-15 19:28:35,371 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 [2023-02-15 19:28:35,373 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 [2023-02-15 19:28:35,588 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-15 19:28:35,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 36 [2023-02-15 19:28:35,599 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 25 treesize of output 19 [2023-02-15 19:28:35,693 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-02-15 19:28:35,694 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 [2023-02-15 19:28:35,707 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 [2023-02-15 19:28:35,765 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 [2023-02-15 19:28:35,927 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 [2023-02-15 19:28:35,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:28:35,988 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2023-02-15 19:28:35,989 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 [2023-02-15 19:28:35,999 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 [2023-02-15 19:28:36,025 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 [2023-02-15 19:28:36,041 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 [2023-02-15 19:28:36,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:28:36,073 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:28:36,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 36 [2023-02-15 19:28:36,080 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 [2023-02-15 19:28:36,084 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 19:28:36,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:28:36,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 139 [2023-02-15 19:28:36,462 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 27 treesize of output 19 [2023-02-15 19:28:36,494 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 20 treesize of output 14 [2023-02-15 19:28:36,505 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 12 treesize of output 8 [2023-02-15 19:28:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-15 19:28:36,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:28:36,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467999078] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:28:36,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:28:36,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2023-02-15 19:28:36,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109602555] [2023-02-15 19:28:36,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:28:36,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 19:28:36,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:28:36,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 19:28:36,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=977, Unknown=1, NotChecked=62, Total=1122 [2023-02-15 19:28:36,795 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) [2023-02-15 19:28:40,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:28:40,186 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2023-02-15 19:28:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 19:28:40,187 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 [2023-02-15 19:28:40,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:28:40,188 INFO L225 Difference]: With dead ends: 164 [2023-02-15 19:28:40,188 INFO L226 Difference]: Without dead ends: 161 [2023-02-15 19:28:40,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=276, Invalid=2582, Unknown=8, NotChecked=104, Total=2970 [2023-02-15 19:28:40,191 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 215 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 61 mSolverCounterUnsat, 43 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 43 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-15 19:28:40,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 927 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2023 Invalid, 43 Unknown, 179 Unchecked, 1.7s Time] [2023-02-15 19:28:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-02-15 19:28:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 100. [2023-02-15 19:28:40,217 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) [2023-02-15 19:28:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2023-02-15 19:28:40,218 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 35 [2023-02-15 19:28:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:28:40,219 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2023-02-15 19:28:40,219 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) [2023-02-15 19:28:40,221 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2023-02-15 19:28:40,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 19:28:40,222 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:40,222 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] [2023-02-15 19:28:40,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 19:28:40,429 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 [2023-02-15 19:28:40,429 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:40,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:40,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1899770360, now seen corresponding path program 1 times [2023-02-15 19:28:40,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:40,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53722533] [2023-02-15 19:28:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:40,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 19:28:40,497 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 19:28:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 19:28:40,547 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 19:28:40,547 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-15 19:28:40,548 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 19:28:40,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 19:28:40,553 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-02-15 19:28:40,556 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 19:28:40,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 07:28:40 BoogieIcfgContainer [2023-02-15 19:28:40,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 19:28:40,589 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 19:28:40,589 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 19:28:40,589 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 19:28:40,590 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:28:27" (3/4) ... [2023-02-15 19:28:40,592 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-15 19:28:40,627 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 19:28:40,627 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 19:28:40,628 INFO L158 Benchmark]: Toolchain (without parser) took 14247.15ms. Allocated memory was 115.3MB in the beginning and 201.3MB in the end (delta: 86.0MB). Free memory was 69.0MB in the beginning and 133.4MB in the end (delta: -64.4MB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. [2023-02-15 19:28:40,628 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 115.3MB. Free memory is still 85.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 19:28:40,628 INFO L158 Benchmark]: CACSL2BoogieTranslator took 397.76ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 68.7MB in the beginning and 108.4MB in the end (delta: -39.7MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. [2023-02-15 19:28:40,629 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.23ms. Allocated memory is still 138.4MB. Free memory was 108.4MB in the beginning and 109.5MB in the end (delta: -1.1MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2023-02-15 19:28:40,629 INFO L158 Benchmark]: Boogie Preprocessor took 39.81ms. Allocated memory is still 138.4MB. Free memory was 109.5MB in the beginning and 106.6MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-15 19:28:40,629 INFO L158 Benchmark]: RCFGBuilder took 590.93ms. Allocated memory is still 138.4MB. Free memory was 106.6MB in the beginning and 82.9MB in the end (delta: 23.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-02-15 19:28:40,630 INFO L158 Benchmark]: TraceAbstraction took 13132.41ms. Allocated memory was 138.4MB in the beginning and 201.3MB in the end (delta: 62.9MB). Free memory was 82.2MB in the beginning and 136.6MB in the end (delta: -54.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 19:28:40,630 INFO L158 Benchmark]: Witness Printer took 38.35ms. Allocated memory is still 201.3MB. Free memory was 136.6MB in the beginning and 133.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-15 19:28:40,631 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 115.3MB. Free memory is still 85.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 397.76ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 68.7MB in the beginning and 108.4MB in the end (delta: -39.7MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.23ms. Allocated memory is still 138.4MB. Free memory was 108.4MB in the beginning and 109.5MB in the end (delta: -1.1MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.81ms. Allocated memory is still 138.4MB. Free memory was 109.5MB in the beginning and 106.6MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 590.93ms. Allocated memory is still 138.4MB. Free memory was 106.6MB in the beginning and 82.9MB in the end (delta: 23.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 13132.41ms. Allocated memory was 138.4MB in the beginning and 201.3MB in the end (delta: 62.9MB). Free memory was 82.2MB in the beginning and 136.6MB in the end (delta: -54.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Witness Printer took 38.35ms. Allocated memory is still 201.3MB. Free memory was 136.6MB in the beginning and 133.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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: 13.0s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 mSolverCounterUnknown, 360 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 352 mSDsluCounter, 1664 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 330 IncrementalHoareTripleChecker+Unchecked, 1440 mSDsCounter, 110 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3267 IncrementalHoareTripleChecker+Invalid, 3750 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 110 mSolverCounterUnsat, 224 mSDtfsCounter, 3267 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 170 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=2, InterpolantAutomatonStates: 45, 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, 90 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 147 ConstructedInterpolants, 27 QuantifiedInterpolants, 4849 SizeOfPredicates, 49 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! [2023-02-15 19:28:40,653 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