./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-token-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/forester-heap/sll-token-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 95135695b4ab9cb9c416390540cae35b9fbb32e4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:26:20,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:26:20,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:26:20,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:26:20,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:26:20,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:26:20,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:26:20,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:26:20,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:26:20,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:26:20,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:26:20,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:26:20,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:26:20,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:26:20,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:26:20,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:26:20,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:26:20,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:26:20,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:26:20,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:26:20,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:26:20,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:26:20,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:26:20,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:26:20,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:26:20,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:26:20,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:26:20,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:26:20,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:26:20,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:26:20,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:26:20,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:26:20,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:26:20,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:26:20,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:26:20,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:26:20,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:26:20,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:26:20,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:26:20,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:26:20,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:26:20,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:26:20,665 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:26:20,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:26:20,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:26:20,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:26:20,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:26:20,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:26:20,668 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:26:20,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:26:20,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:26:20,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:26:20,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:26:20,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:26:20,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:26:20,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:26:20,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:26:20,670 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:26:20,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:26:20,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:26:20,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:26:20,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:26:20,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:26:20,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:26:20,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:26:20,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:26:20,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:26:20,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:26:20,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:26:20,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:26:20,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:26:20,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:26:20,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95135695b4ab9cb9c416390540cae35b9fbb32e4 [2021-08-26 02:26:20,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:26:21,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:26:21,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:26:21,005 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:26:21,006 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:26:21,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-token-1.i [2021-08-26 02:26:21,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b836bb48/3be6109b80e3421a8b2d1c0770729021/FLAG85300f94a [2021-08-26 02:26:21,435 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:26:21,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i [2021-08-26 02:26:21,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b836bb48/3be6109b80e3421a8b2d1c0770729021/FLAG85300f94a [2021-08-26 02:26:21,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b836bb48/3be6109b80e3421a8b2d1c0770729021 [2021-08-26 02:26:21,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:26:21,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:26:21,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:26:21,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:26:21,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:26:21,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:26:21" (1/1) ... [2021-08-26 02:26:21,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108e8607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21, skipping insertion in model container [2021-08-26 02:26:21,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:26:21" (1/1) ... [2021-08-26 02:26:21,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:26:21,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:26:21,729 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i[22162,22175] [2021-08-26 02:26:21,739 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i[22311,22324] [2021-08-26 02:26:21,739 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i[22402,22415] [2021-08-26 02:26:21,741 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i[22484,22497] [2021-08-26 02:26:21,742 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i[22562,22575] [2021-08-26 02:26:21,744 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i[22708,22721] [2021-08-26 02:26:21,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:26:21,757 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:26:21,783 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i[22162,22175] [2021-08-26 02:26:21,794 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i[22311,22324] [2021-08-26 02:26:21,795 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i[22402,22415] [2021-08-26 02:26:21,796 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i[22484,22497] [2021-08-26 02:26:21,798 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i[22562,22575] [2021-08-26 02:26:21,799 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i[22708,22721] [2021-08-26 02:26:21,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:26:21,845 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:26:21,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21 WrapperNode [2021-08-26 02:26:21,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:26:21,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:26:21,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:26:21,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:26:21,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21" (1/1) ... [2021-08-26 02:26:21,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21" (1/1) ... [2021-08-26 02:26:21,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:26:21,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:26:21,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:26:21,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:26:21,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21" (1/1) ... [2021-08-26 02:26:21,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21" (1/1) ... [2021-08-26 02:26:21,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21" (1/1) ... [2021-08-26 02:26:21,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21" (1/1) ... [2021-08-26 02:26:21,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21" (1/1) ... [2021-08-26 02:26:21,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21" (1/1) ... [2021-08-26 02:26:21,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21" (1/1) ... [2021-08-26 02:26:21,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:26:21,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:26:21,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:26:21,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:26:21,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21" (1/1) ... [2021-08-26 02:26:21,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:26:21,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:21,954 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) [2021-08-26 02:26:21,998 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 [2021-08-26 02:26:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:26:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:26:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:26:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:26:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:26:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:26:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:26:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:26:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:26:22,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:26:22,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:26:22,300 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-08-26 02:26:22,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:26:22 BoogieIcfgContainer [2021-08-26 02:26:22,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:26:22,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:26:22,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:26:22,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:26:22,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:26:21" (1/3) ... [2021-08-26 02:26:22,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d18610e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:26:22, skipping insertion in model container [2021-08-26 02:26:22,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:26:21" (2/3) ... [2021-08-26 02:26:22,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d18610e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:26:22, skipping insertion in model container [2021-08-26 02:26:22,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:26:22" (3/3) ... [2021-08-26 02:26:22,308 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-token-1.i [2021-08-26 02:26:22,311 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:26:22,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-08-26 02:26:22,335 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:26:22,339 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 02:26:22,339 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-26 02:26:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 43 states have internal predecessors, (67), 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) [2021-08-26 02:26:22,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 02:26:22,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:22,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 02:26:22,350 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:26:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:22,353 INFO L82 PathProgramCache]: Analyzing trace with hash 890337990, now seen corresponding path program 1 times [2021-08-26 02:26:22,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:22,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374700776] [2021-08-26 02:26:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:22,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:22,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:22,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374700776] [2021-08-26 02:26:22,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374700776] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:26:22,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:26:22,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 02:26:22,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057874443] [2021-08-26 02:26:22,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:26:22,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:26:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:26:22,469 INFO L87 Difference]: Start difference. First operand has 44 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 43 states have internal predecessors, (67), 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-26 02:26:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:22,479 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2021-08-26 02:26:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:26:22,480 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-08-26 02:26:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:22,484 INFO L225 Difference]: With dead ends: 86 [2021-08-26 02:26:22,484 INFO L226 Difference]: Without dead ends: 39 [2021-08-26 02:26:22,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:26:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-26 02:26:22,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-26 02:26:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 38 states have internal predecessors, (41), 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) [2021-08-26 02:26:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-08-26 02:26:22,503 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 6 [2021-08-26 02:26:22,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:22,503 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-08-26 02:26:22,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-26 02:26:22,504 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-08-26 02:26:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 02:26:22,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:22,504 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 02:26:22,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:26:22,505 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:26:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:22,505 INFO L82 PathProgramCache]: Analyzing trace with hash 889571369, now seen corresponding path program 1 times [2021-08-26 02:26:22,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:22,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437267701] [2021-08-26 02:26:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:22,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:22,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:22,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437267701] [2021-08-26 02:26:22,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437267701] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:26:22,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:26:22,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 02:26:22,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577947076] [2021-08-26 02:26:22,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:26:22,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:26:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:26:22,544 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-08-26 02:26:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:22,570 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-08-26 02:26:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:26:22,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-08-26 02:26:22,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:22,572 INFO L225 Difference]: With dead ends: 39 [2021-08-26 02:26:22,572 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 02:26:22,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:26:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 02:26:22,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-26 02:26:22,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.21875) internal successors, (39), 36 states have internal predecessors, (39), 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) [2021-08-26 02:26:22,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-08-26 02:26:22,575 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 6 [2021-08-26 02:26:22,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:22,576 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-08-26 02:26:22,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-08-26 02:26:22,576 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-08-26 02:26:22,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 02:26:22,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:22,576 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:22,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 02:26:22,577 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:26:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:22,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1806865149, now seen corresponding path program 1 times [2021-08-26 02:26:22,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:22,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442682399] [2021-08-26 02:26:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:22,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:22,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:22,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442682399] [2021-08-26 02:26:22,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442682399] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:26:22,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:26:22,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 02:26:22,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628998254] [2021-08-26 02:26:22,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:26:22,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:22,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:26:22,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:26:22,626 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-08-26 02:26:22,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:22,661 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-08-26 02:26:22,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:26:22,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-08-26 02:26:22,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:22,662 INFO L225 Difference]: With dead ends: 63 [2021-08-26 02:26:22,662 INFO L226 Difference]: Without dead ends: 61 [2021-08-26 02:26:22,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:26:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-26 02:26:22,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2021-08-26 02:26:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 34 states have internal predecessors, (37), 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) [2021-08-26 02:26:22,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-08-26 02:26:22,666 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 7 [2021-08-26 02:26:22,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:22,666 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-08-26 02:26:22,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-08-26 02:26:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-08-26 02:26:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 02:26:22,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:22,667 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:22,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 02:26:22,668 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:26:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash -913382283, now seen corresponding path program 1 times [2021-08-26 02:26:22,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:22,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836580246] [2021-08-26 02:26:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:22,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 02:26:22,689 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 02:26:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 02:26:22,716 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 02:26:22,716 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 02:26:22,717 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:26:22,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:26:22,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:26:22,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:26:22,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:26:22,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:26:22,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 02:26:22,723 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 02:26:22,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:26:22 BoogieIcfgContainer [2021-08-26 02:26:22,734 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 02:26:22,734 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 02:26:22,734 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 02:26:22,735 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 02:26:22,735 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:26:22" (3/4) ... [2021-08-26 02:26:22,736 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 02:26:22,756 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 02:26:22,756 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 02:26:22,757 INFO L168 Benchmark]: Toolchain (without parser) took 1292.43 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 27.7 MB in the beginning and 30.9 MB in the end (delta: -3.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. [2021-08-26 02:26:22,758 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 52.4 MB. Free memory was 34.2 MB in the beginning and 34.1 MB in the end (delta: 71.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:26:22,758 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.73 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 27.6 MB in the beginning and 48.9 MB in the end (delta: -21.4 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:26:22,758 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.32 ms. Allocated memory is still 73.4 MB. Free memory was 48.9 MB in the beginning and 46.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:26:22,759 INFO L168 Benchmark]: Boogie Preprocessor took 18.33 ms. Allocated memory is still 73.4 MB. Free memory was 46.8 MB in the beginning and 45.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:26:22,759 INFO L168 Benchmark]: RCFGBuilder took 398.51 ms. Allocated memory is still 73.4 MB. Free memory was 45.2 MB in the beginning and 38.7 MB in the end (delta: 6.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2021-08-26 02:26:22,759 INFO L168 Benchmark]: TraceAbstraction took 431.59 ms. Allocated memory is still 73.4 MB. Free memory was 38.0 MB in the beginning and 33.2 MB in the end (delta: 4.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2021-08-26 02:26:22,760 INFO L168 Benchmark]: Witness Printer took 21.88 ms. Allocated memory is still 73.4 MB. Free memory was 33.2 MB in the beginning and 30.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:26:22,761 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 52.4 MB. Free memory was 34.2 MB in the beginning and 34.1 MB in the end (delta: 71.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 380.73 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 27.6 MB in the beginning and 48.9 MB in the end (delta: -21.4 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.32 ms. Allocated memory is still 73.4 MB. Free memory was 48.9 MB in the beginning and 46.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.33 ms. Allocated memory is still 73.4 MB. Free memory was 46.8 MB in the beginning and 45.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 398.51 ms. Allocated memory is still 73.4 MB. Free memory was 45.2 MB in the beginning and 38.7 MB in the end (delta: 6.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 431.59 ms. Allocated memory is still 73.4 MB. Free memory was 38.0 MB in the beginning and 33.2 MB in the end (delta: 4.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Witness Printer took 21.88 ms. Allocated memory is still 73.4 MB. Free memory was 33.2 MB in the beginning and 30.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1031]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1003] SLL* head = malloc(sizeof(SLL)); [L1004] head->next = ((void*)0) [L1005] head->data = 0 [L1007] SLL* x = head; [L1010] COND FALSE !(__VERIFIER_nondet_int()) [L1018] x->data = 1 [L1019] x->next = malloc(sizeof(SLL)) [L1020] EXPR x->next [L1020] x->next->data = 2 [L1022] x = head [L1024] COND FALSE !(!(((void*)0) != x)) [L1026] EXPR x->data [L1026] COND FALSE !(1 != x->data) [L1031] EXPR x->data [L1031] COND TRUE !(2 == x->data) [L1031] reach_error() - UnprovableResult [Line: 1016]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 387.1ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 5.7ms, AutomataDifference: 91.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 106 SDtfs, 76 SDslu, 44 SDs, 0 SdLazy, 39 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 15.7ms AutomataMinimizationTime, 3 MinimizatonAttempts, 26 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 12.5ms SsaConstructionTime, 51.5ms SatisfiabilityAnalysisTime, 77.7ms InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 31 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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! [2021-08-26 02:26:22,797 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...