./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 3a877d22 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 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:43:19,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:43:19,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:43:19,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:43:19,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:43:19,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:43:19,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:43:19,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:43:19,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:43:19,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:43:19,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:43:19,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:43:19,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:43:19,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:43:19,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:43:19,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:43:19,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:43:19,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:43:19,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:43:19,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:43:19,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:43:19,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:43:19,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:43:19,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:43:19,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:43:19,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:43:19,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:43:19,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:43:19,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:43:19,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:43:19,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:43:19,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:43:19,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:43:19,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:43:19,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:43:19,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:43:19,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:43:19,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:43:19,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:43:19,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:43:19,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:43:19,452 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:43:19,476 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:43:19,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:43:19,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:43:19,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:43:19,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:43:19,478 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:43:19,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:43:19,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:43:19,479 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:43:19,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:43:19,479 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:43:19,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:43:19,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:43:19,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:43:19,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:43:19,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:43:19,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:43:19,482 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:43:19,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:43:19,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:43:19,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:43:19,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:43:19,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:43:19,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:43:19,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:43:19,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:43:19,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:43:19,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:43:19,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:43:19,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:43:19,484 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:43:19,484 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:43:19,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:43:19,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:43:19,485 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52c76a7df26fca079cfc43e405f2f619070583ff933a68f0bba20f0a9dce8e14 [2021-12-15 10:43:19,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:43:19,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:43:19,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:43:19,713 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:43:19,714 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:43:19,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/recursive_list.i [2021-12-15 10:43:19,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f929ab48/8f77a13d4cb648aa9438f4c1eb79a615/FLAG677812ef8 [2021-12-15 10:43:20,122 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:43:20,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/recursive_list.i [2021-12-15 10:43:20,127 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f929ab48/8f77a13d4cb648aa9438f4c1eb79a615/FLAG677812ef8 [2021-12-15 10:43:20,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f929ab48/8f77a13d4cb648aa9438f4c1eb79a615 [2021-12-15 10:43:20,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:43:20,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:43:20,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:43:20,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:43:20,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:43:20,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:43:20" (1/1) ... [2021-12-15 10:43:20,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a279c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20, skipping insertion in model container [2021-12-15 10:43:20,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:43:20" (1/1) ... [2021-12-15 10:43:20,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:43:20,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:43:20,678 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] [2021-12-15 10:43:20,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:43:20,701 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:43:20,711 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] [2021-12-15 10:43:20,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:43:20,730 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:43:20,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20 WrapperNode [2021-12-15 10:43:20,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:43:20,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:43:20,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:43:20,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:43:20,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20" (1/1) ... [2021-12-15 10:43:20,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20" (1/1) ... [2021-12-15 10:43:20,761 INFO L137 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2021-12-15 10:43:20,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:43:20,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:43:20,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:43:20,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:43:20,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20" (1/1) ... [2021-12-15 10:43:20,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20" (1/1) ... [2021-12-15 10:43:20,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20" (1/1) ... [2021-12-15 10:43:20,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20" (1/1) ... [2021-12-15 10:43:20,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20" (1/1) ... [2021-12-15 10:43:20,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20" (1/1) ... [2021-12-15 10:43:20,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20" (1/1) ... [2021-12-15 10:43:20,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:43:20,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:43:20,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:43:20,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:43:20,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20" (1/1) ... [2021-12-15 10:43:20,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:43:20,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:43:20,829 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) [2021-12-15 10:43:20,855 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 [2021-12-15 10:43:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 10:43:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:43:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:43:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 10:43:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 10:43:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 10:43:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 10:43:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:43:20,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:43:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 10:43:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-12-15 10:43:20,866 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-12-15 10:43:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 10:43:20,933 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:43:20,934 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:43:21,048 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:43:21,057 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:43:21,057 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 10:43:21,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:43:21 BoogieIcfgContainer [2021-12-15 10:43:21,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:43:21,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:43:21,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:43:21,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:43:21,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:43:20" (1/3) ... [2021-12-15 10:43:21,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e1cd0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:43:21, skipping insertion in model container [2021-12-15 10:43:21,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:20" (2/3) ... [2021-12-15 10:43:21,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e1cd0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:43:21, skipping insertion in model container [2021-12-15 10:43:21,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:43:21" (3/3) ... [2021-12-15 10:43:21,077 INFO L111 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2021-12-15 10:43:21,080 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:43:21,082 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:43:21,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:43:21,128 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, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 10:43:21,129 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:43:21,144 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) [2021-12-15 10:43:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 10:43:21,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:43:21,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:43:21,149 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:43:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:43:21,153 INFO L85 PathProgramCache]: Analyzing trace with hash -557630289, now seen corresponding path program 1 times [2021-12-15 10:43:21,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:43:21,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740279406] [2021-12-15 10:43:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:43:21,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:43:21,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:43:21,205 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 10:43:21,211 INFO L158 Benchmark]: Toolchain (without parser) took 644.25ms. Allocated memory is still 88.1MB. Free memory was 60.7MB in the beginning and 56.3MB in the end (delta: 4.4MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2021-12-15 10:43:21,212 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 73.4MB. Free memory is still 40.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:43:21,212 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.42ms. Allocated memory is still 88.1MB. Free memory was 60.5MB in the beginning and 50.7MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 10:43:21,213 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.74ms. Allocated memory is still 88.1MB. Free memory was 50.6MB in the beginning and 49.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 10:43:21,214 INFO L158 Benchmark]: Boogie Preprocessor took 25.65ms. Allocated memory is still 88.1MB. Free memory was 49.1MB in the beginning and 47.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:43:21,215 INFO L158 Benchmark]: RCFGBuilder took 282.00ms. Allocated memory is still 88.1MB. Free memory was 47.8MB in the beginning and 65.9MB in the end (delta: -18.0MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. [2021-12-15 10:43:21,215 INFO L158 Benchmark]: TraceAbstraction took 137.82ms. Allocated memory is still 88.1MB. Free memory was 65.3MB in the beginning and 56.3MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 10:43:21,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 73.4MB. Free memory is still 40.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 161.42ms. Allocated memory is still 88.1MB. Free memory was 60.5MB in the beginning and 50.7MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.74ms. Allocated memory is still 88.1MB. Free memory was 50.6MB in the beginning and 49.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.65ms. Allocated memory is still 88.1MB. Free memory was 49.1MB in the beginning and 47.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 282.00ms. Allocated memory is still 88.1MB. Free memory was 47.8MB in the beginning and 65.9MB in the end (delta: -18.0MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. * TraceAbstraction took 137.82ms. Allocated memory is still 88.1MB. Free memory was 65.3MB in the beginning and 56.3MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 10:43:21,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_Bitvector.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 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:43:23,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:43:23,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:43:23,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:43:23,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:43:23,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:43:23,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:43:23,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:43:23,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:43:23,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:43:23,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:43:23,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:43:23,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:43:23,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:43:23,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:43:23,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:43:23,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:43:23,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:43:23,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:43:23,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:43:23,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:43:23,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:43:23,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:43:23,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:43:23,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:43:23,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:43:23,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:43:23,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:43:23,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:43:23,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:43:23,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:43:23,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:43:23,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:43:23,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:43:23,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:43:23,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:43:23,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:43:23,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:43:23,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:43:23,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:43:23,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:43:23,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 10:43:23,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:43:23,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:43:23,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:43:23,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:43:23,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:43:23,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:43:23,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:43:23,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:43:23,166 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:43:23,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:43:23,166 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:43:23,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:43:23,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:43:23,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:43:23,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:43:23,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:43:23,167 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 10:43:23,167 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 10:43:23,168 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 10:43:23,168 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:43:23,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:43:23,168 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:43:23,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:43:23,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:43:23,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:43:23,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:43:23,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:43:23,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:43:23,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:43:23,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:43:23,177 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 10:43:23,177 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 10:43:23,178 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:43:23,178 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:43:23,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:43:23,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:43:23,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 10:43:23,179 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52c76a7df26fca079cfc43e405f2f619070583ff933a68f0bba20f0a9dce8e14 [2021-12-15 10:43:23,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:43:23,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:43:23,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:43:23,499 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:43:23,499 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:43:23,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/recursive_list.i [2021-12-15 10:43:23,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16fae454b/3255091ac7d24e0788173a0850f97446/FLAG29446c638 [2021-12-15 10:43:23,927 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:43:23,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/recursive_list.i [2021-12-15 10:43:23,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16fae454b/3255091ac7d24e0788173a0850f97446/FLAG29446c638 [2021-12-15 10:43:23,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16fae454b/3255091ac7d24e0788173a0850f97446 [2021-12-15 10:43:23,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:43:23,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:43:23,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:43:23,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:43:23,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:43:23,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:43:23" (1/1) ... [2021-12-15 10:43:23,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20057a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:23, skipping insertion in model container [2021-12-15 10:43:23,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:43:23" (1/1) ... [2021-12-15 10:43:23,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:43:23,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:43:24,065 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] [2021-12-15 10:43:24,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:43:24,095 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:43:24,133 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] [2021-12-15 10:43:24,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:43:24,154 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:43:24,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:24 WrapperNode [2021-12-15 10:43:24,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:43:24,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:43:24,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:43:24,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:43:24,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:24" (1/1) ... [2021-12-15 10:43:24,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:24" (1/1) ... [2021-12-15 10:43:24,209 INFO L137 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2021-12-15 10:43:24,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:43:24,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:43:24,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:43:24,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:43:24,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:24" (1/1) ... [2021-12-15 10:43:24,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:24" (1/1) ... [2021-12-15 10:43:24,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:24" (1/1) ... [2021-12-15 10:43:24,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:24" (1/1) ... [2021-12-15 10:43:24,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:24" (1/1) ... [2021-12-15 10:43:24,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:24" (1/1) ... [2021-12-15 10:43:24,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:24" (1/1) ... [2021-12-15 10:43:24,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:43:24,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:43:24,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:43:24,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:43:24,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:24" (1/1) ... [2021-12-15 10:43:24,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:43:24,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:43:24,298 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) [2021-12-15 10:43:24,319 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 [2021-12-15 10:43:24,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 10:43:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:43:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 10:43:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 10:43:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 10:43:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 10:43:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-15 10:43:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:43:24,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:43:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-12-15 10:43:24,343 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-12-15 10:43:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 10:43:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-15 10:43:24,430 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:43:24,433 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:43:24,591 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:43:24,595 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:43:24,596 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 10:43:24,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:43:24 BoogieIcfgContainer [2021-12-15 10:43:24,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:43:24,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:43:24,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:43:24,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:43:24,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:43:23" (1/3) ... [2021-12-15 10:43:24,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d465e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:43:24, skipping insertion in model container [2021-12-15 10:43:24,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:43:24" (2/3) ... [2021-12-15 10:43:24,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d465e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:43:24, skipping insertion in model container [2021-12-15 10:43:24,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:43:24" (3/3) ... [2021-12-15 10:43:24,618 INFO L111 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2021-12-15 10:43:24,622 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:43:24,622 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:43:24,673 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:43:24,682 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, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 10:43:24,682 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:43:24,705 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) [2021-12-15 10:43:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 10:43:24,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:43:24,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:43:24,711 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:43:24,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:43:24,717 INFO L85 PathProgramCache]: Analyzing trace with hash -557630289, now seen corresponding path program 1 times [2021-12-15 10:43:24,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 10:43:24,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423242543] [2021-12-15 10:43:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:43:24,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 10:43:24,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 10:43:24,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 10:43:24,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 10:43:24,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:43:24,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 10:43:24,991 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 10:43:24,995 INFO L158 Benchmark]: Toolchain (without parser) took 1036.02ms. Allocated memory was 73.4MB in the beginning and 90.2MB in the end (delta: 16.8MB). Free memory was 58.6MB in the beginning and 72.0MB in the end (delta: -13.4MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. [2021-12-15 10:43:24,996 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 73.4MB. Free memory is still 56.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:43:24,996 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.37ms. Allocated memory is still 73.4MB. Free memory was 58.5MB in the beginning and 56.8MB in the end (delta: 1.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 10:43:24,996 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.61ms. Allocated memory is still 73.4MB. Free memory was 56.8MB in the beginning and 55.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:43:24,997 INFO L158 Benchmark]: Boogie Preprocessor took 44.84ms. Allocated memory is still 73.4MB. Free memory was 55.2MB in the beginning and 54.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 10:43:24,997 INFO L158 Benchmark]: RCFGBuilder took 340.47ms. Allocated memory is still 73.4MB. Free memory was 53.8MB in the beginning and 43.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 10:43:24,997 INFO L158 Benchmark]: TraceAbstraction took 395.82ms. Allocated memory was 73.4MB in the beginning and 90.2MB in the end (delta: 16.8MB). Free memory was 42.9MB in the beginning and 72.0MB in the end (delta: -29.1MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2021-12-15 10:43:24,999 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 73.4MB. Free memory is still 56.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 194.37ms. Allocated memory is still 73.4MB. Free memory was 58.5MB in the beginning and 56.8MB in the end (delta: 1.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.61ms. Allocated memory is still 73.4MB. Free memory was 56.8MB in the beginning and 55.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 44.84ms. Allocated memory is still 73.4MB. Free memory was 55.2MB in the beginning and 54.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 340.47ms. Allocated memory is still 73.4MB. Free memory was 53.8MB in the beginning and 43.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 395.82ms. Allocated memory was 73.4MB in the beginning and 90.2MB in the end (delta: 16.8MB). Free memory was 42.9MB in the beginning and 72.0MB in the end (delta: -29.1MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 10:43:25,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable