./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/recursive_list.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/ldv-regression/recursive_list.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 52c76a7df26fca079cfc43e405f2f619070583ff933a68f0bba20f0a9dce8e14 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:03:12,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:03:12,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:03:12,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:03:12,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:03:12,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:03:12,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:03:12,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:03:12,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:03:12,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:03:12,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:03:12,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:03:12,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:03:12,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:03:12,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:03:12,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:03:12,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:03:12,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:03:12,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:03:12,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:03:12,111 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:03:12,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:03:12,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:03:12,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:03:12,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:03:12,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:03:12,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:03:12,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:03:12,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:03:12,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:03:12,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:03:12,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:03:12,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:03:12,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:03:12,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:03:12,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:03:12,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:03:12,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:03:12,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:03:12,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:03:12,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:03:12,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:03:12,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:03:12,169 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:03:12,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:03:12,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:03:12,170 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:03:12,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:03:12,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:03:12,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:03:12,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:03:12,173 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:03:12,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:03:12,174 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:03:12,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:03:12,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:03:12,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:03:12,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:03:12,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:03:12,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:03:12,175 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:03:12,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:03:12,175 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:03:12,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:03:12,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:03:12,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:03:12,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:03:12,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:03:12,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:03:12,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:03:12,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:03:12,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:03:12,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:03:12,178 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:03:12,178 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:03:12,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:03:12,179 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52c76a7df26fca079cfc43e405f2f619070583ff933a68f0bba20f0a9dce8e14 [2022-07-21 02:03:12,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:03:12,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:03:12,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:03:12,557 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:03:12,558 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:03:12,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/recursive_list.i [2022-07-21 02:03:12,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060977fc7/8d9c61662a8947959ceddac55f428287/FLAGd8280ff3f [2022-07-21 02:03:13,032 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:03:13,033 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/recursive_list.i [2022-07-21 02:03:13,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060977fc7/8d9c61662a8947959ceddac55f428287/FLAGd8280ff3f [2022-07-21 02:03:13,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060977fc7/8d9c61662a8947959ceddac55f428287 [2022-07-21 02:03:13,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:03:13,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:03:13,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:03:13,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:03:13,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:03:13,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:03:13" (1/1) ... [2022-07-21 02:03:13,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd9f467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13, skipping insertion in model container [2022-07-21 02:03:13,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:03:13" (1/1) ... [2022-07-21 02:03:13,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:03:13,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:03:13,617 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/recursive_list.i[409,422] [2022-07-21 02:03:13,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:03:13,648 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:03:13,661 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/recursive_list.i[409,422] [2022-07-21 02:03:13,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:03:13,703 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:03:13,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13 WrapperNode [2022-07-21 02:03:13,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:03:13,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:03:13,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:03:13,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:03:13,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13" (1/1) ... [2022-07-21 02:03:13,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13" (1/1) ... [2022-07-21 02:03:13,762 INFO L137 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2022-07-21 02:03:13,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:03:13,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:03:13,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:03:13,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:03:13,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13" (1/1) ... [2022-07-21 02:03:13,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13" (1/1) ... [2022-07-21 02:03:13,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13" (1/1) ... [2022-07-21 02:03:13,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13" (1/1) ... [2022-07-21 02:03:13,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13" (1/1) ... [2022-07-21 02:03:13,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13" (1/1) ... [2022-07-21 02:03:13,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13" (1/1) ... [2022-07-21 02:03:13,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:03:13,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:03:13,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:03:13,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:03:13,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13" (1/1) ... [2022-07-21 02:03:13,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:03:13,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:03:13,841 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) [2022-07-21 02:03:13,869 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 [2022-07-21 02:03:13,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 02:03:13,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:03:13,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:03:13,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 02:03:13,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 02:03:13,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 02:03:13,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 02:03:13,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:03:13,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:03:13,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 02:03:13,885 INFO L130 BoogieDeclarations]: Found specification of procedure append [2022-07-21 02:03:13,885 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2022-07-21 02:03:13,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 02:03:13,947 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:03:13,949 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:03:14,090 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:03:14,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:03:14,095 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 02:03:14,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:03:14 BoogieIcfgContainer [2022-07-21 02:03:14,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:03:14,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:03:14,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:03:14,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:03:14,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:03:13" (1/3) ... [2022-07-21 02:03:14,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b26178f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:03:14, skipping insertion in model container [2022-07-21 02:03:14,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:13" (2/3) ... [2022-07-21 02:03:14,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b26178f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:03:14, skipping insertion in model container [2022-07-21 02:03:14,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:03:14" (3/3) ... [2022-07-21 02:03:14,103 INFO L111 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2022-07-21 02:03:14,122 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:03:14,123 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:03:14,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:03:14,199 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@715e1416, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@74e9c852 [2022-07-21 02:03:14,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:03:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:03:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 02:03:14,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:03:14,210 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:03:14,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:03:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:03:14,215 INFO L85 PathProgramCache]: Analyzing trace with hash -557630289, now seen corresponding path program 1 times [2022-07-21 02:03:14,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:03:14,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522774525] [2022-07-21 02:03:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:03:14,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:03:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 02:03:14,369 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 02:03:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 02:03:14,483 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 02:03:14,487 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 02:03:14,490 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 02:03:14,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:03:14,498 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 02:03:14,503 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 02:03:14,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:03:14 BoogieIcfgContainer [2022-07-21 02:03:14,545 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 02:03:14,548 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 02:03:14,549 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 02:03:14,550 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 02:03:14,550 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:03:14" (3/4) ... [2022-07-21 02:03:14,552 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-21 02:03:14,627 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 02:03:14,628 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 02:03:14,630 INFO L158 Benchmark]: Toolchain (without parser) took 1178.30ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 30.2MB in the beginning and 46.6MB in the end (delta: -16.4MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. [2022-07-21 02:03:14,630 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 52.4MB. Free memory was 34.0MB in the beginning and 33.9MB in the end (delta: 37.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:03:14,630 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.87ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 30.0MB in the beginning and 49.5MB in the end (delta: -19.5MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2022-07-21 02:03:14,635 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.88ms. Allocated memory is still 65.0MB. Free memory was 49.5MB in the beginning and 47.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:03:14,635 INFO L158 Benchmark]: Boogie Preprocessor took 41.53ms. Allocated memory is still 65.0MB. Free memory was 47.9MB in the beginning and 46.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:03:14,636 INFO L158 Benchmark]: RCFGBuilder took 290.50ms. Allocated memory is still 65.0MB. Free memory was 46.7MB in the beginning and 36.4MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 02:03:14,636 INFO L158 Benchmark]: TraceAbstraction took 447.40ms. Allocated memory is still 65.0MB. Free memory was 35.7MB in the beginning and 30.7MB in the end (delta: 5.0MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2022-07-21 02:03:14,636 INFO L158 Benchmark]: Witness Printer took 79.70ms. Allocated memory is still 65.0MB. Free memory was 30.7MB in the beginning and 46.6MB in the end (delta: -15.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-21 02:03:14,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 52.4MB. Free memory was 34.0MB in the beginning and 33.9MB in the end (delta: 37.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.87ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 30.0MB in the beginning and 49.5MB in the end (delta: -19.5MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.88ms. Allocated memory is still 65.0MB. Free memory was 49.5MB in the beginning and 47.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 41.53ms. Allocated memory is still 65.0MB. Free memory was 47.9MB in the beginning and 46.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 290.50ms. Allocated memory is still 65.0MB. Free memory was 46.7MB in the beginning and 36.4MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 447.40ms. Allocated memory is still 65.0MB. Free memory was 35.7MB in the beginning and 30.7MB in the end (delta: 5.0MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Witness Printer took 79.70ms. Allocated memory is still 65.0MB. Free memory was 30.7MB in the beginning and 46.6MB in the end (delta: -15.8MB). 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: 10]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i = 1; VAL [i=1] [L39] struct list *l,m; [L40] l = &m [L41] l->next = 0 [L42] l->n = 0 VAL [i=1, l={5:0}, m={5:0}] [L44] CALL, EXPR append(l, 1) VAL [i=1] [L27] struct list *new_el; [L29] CALL, EXPR allocate_memory() [L22] return malloc(8U); [L29] RET, EXPR allocate_memory() [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; VAL [\old(n)=1, \result={-1:0}, i=1, l={5:0}, l={5:0}, n=1, new_el={-1:0}] [L44] RET, EXPR append(l, 1) VAL [append(l, 1)={-1:0}, i=1, l={5:0}, m={5:0}] [L44] l = append(l, 1) [L45] CALL, EXPR append(l, 2) VAL [i=1] [L27] struct list *new_el; [L29] CALL, EXPR allocate_memory() [L22] return malloc(8U); [L29] RET, EXPR allocate_memory() [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; VAL [\old(n)=2, \result={-2:0}, i=1, l={-1:0}, l={-1:0}, n=2, new_el={-2:0}] [L45] RET, EXPR append(l, 2) VAL [append(l, 2)={-2:0}, i=1, l={-1:0}, m={5:0}] [L45] l = append(l, 2) [L50] EXPR l->next [L50] EXPR l->next->next [L50] EXPR l->next->next->n VAL [i=1, l={-2:0}, l->next={-1:0}, l->next->next={5:0}, l->next->next->n=0, m={5:0}] [L50] COND TRUE l->next->next->n == 0 [L50] CALL err() [L10] reach_error() VAL [i=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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! [2022-07-21 02:03:14,676 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