/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/ldv-regression/recursive_list.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:54:27,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:54:27,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:54:27,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:54:27,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:54:27,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:54:27,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:54:27,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:54:27,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:54:27,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:54:27,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:54:27,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:54:27,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:54:27,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:54:27,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:54:27,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:54:27,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:54:27,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:54:27,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:54:27,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:54:27,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:54:27,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:54:27,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:54:27,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:54:27,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:54:27,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:54:27,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:54:27,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:54:27,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:54:27,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:54:27,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:54:27,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:54:27,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:54:27,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:54:27,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:54:27,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:54:27,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:54:27,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:54:27,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:54:27,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:54:27,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:54:27,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:54:27,447 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:54:27,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:54:27,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:54:27,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:54:27,453 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:54:27,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:54:27,454 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:54:27,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:54:27,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:54:27,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:54:27,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:54:27,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:54:27,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:54:27,455 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:54:27,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:54:27,456 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:54:27,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:54:27,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:54:27,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:54:27,456 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:54:27,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:54:27,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:54:27,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:54:27,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:54:27,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:54:27,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:54:27,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:54:27,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:54:27,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:54:27,459 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:54:27,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:54:27,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:54:27,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:54:27,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:54:27,863 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:54:27,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-10-27 19:54:27,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33ba82212/11ab87fb14d04eeab3c86fec733a36f5/FLAG3808d946b [2020-10-27 19:54:28,621 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:54:28,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-10-27 19:54:28,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33ba82212/11ab87fb14d04eeab3c86fec733a36f5/FLAG3808d946b [2020-10-27 19:54:29,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33ba82212/11ab87fb14d04eeab3c86fec733a36f5 [2020-10-27 19:54:29,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:54:29,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:54:29,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:54:29,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:54:29,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:54:29,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:54:29" (1/1) ... [2020-10-27 19:54:29,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d0eba46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:54:29, skipping insertion in model container [2020-10-27 19:54:29,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:54:29" (1/1) ... [2020-10-27 19:54:29,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:54:29,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:54:29,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:54:29,253 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:54:29,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:54:29,289 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:54:29,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:54:29 WrapperNode [2020-10-27 19:54:29,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:54:29,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:54:29,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:54:29,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:54:29,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:54:29" (1/1) ... [2020-10-27 19:54:29,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:54:29" (1/1) ... [2020-10-27 19:54:29,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:54:29" (1/1) ... [2020-10-27 19:54:29,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:54:29" (1/1) ... [2020-10-27 19:54:29,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:54:29" (1/1) ... [2020-10-27 19:54:29,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:54:29" (1/1) ... [2020-10-27 19:54:29,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:54:29" (1/1) ... [2020-10-27 19:54:29,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:54:29,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:54:29,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:54:29,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:54:29,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:54:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:54:29,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:54:29,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:54:29,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:54:29,415 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-10-27 19:54:29,416 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_memory [2020-10-27 19:54:29,416 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2020-10-27 19:54:29,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:54:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:54:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:54:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:54:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:54:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:54:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-10-27 19:54:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_memory [2020-10-27 19:54:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:54:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure append [2020-10-27 19:54:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:54:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:54:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:54:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:54:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:54:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:54:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:54:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:54:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:54:29,954 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:54:29,955 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 19:54:29,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:54:29 BoogieIcfgContainer [2020-10-27 19:54:29,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:54:29,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:54:29,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:54:29,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:54:29,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:54:29" (1/3) ... [2020-10-27 19:54:29,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4859b2c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:54:29, skipping insertion in model container [2020-10-27 19:54:29,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:54:29" (2/3) ... [2020-10-27 19:54:29,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4859b2c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:54:29, skipping insertion in model container [2020-10-27 19:54:29,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:54:29" (3/3) ... [2020-10-27 19:54:29,971 INFO L111 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2020-10-27 19:54:29,984 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:54:29,989 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:54:30,008 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:54:30,052 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:54:30,052 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:54:30,053 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:54:30,053 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:54:30,053 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:54:30,053 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:54:30,054 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:54:30,054 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:54:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-27 19:54:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:54:30,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:30,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:54:30,090 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:30,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:30,100 INFO L82 PathProgramCache]: Analyzing trace with hash 598284727, now seen corresponding path program 1 times [2020-10-27 19:54:30,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:30,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104034988] [2020-10-27 19:54:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 19:54:30,487 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 19:54:30,488 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 19:54:30,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:54:30,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 07:54:30 BoogieIcfgContainer [2020-10-27 19:54:30,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 19:54:30,526 INFO L168 Benchmark]: Toolchain (without parser) took 1507.90 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 82.1 MB in the end (delta: 43.7 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:54:30,527 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:54:30,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.45 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 115.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 19:54:30,533 INFO L168 Benchmark]: Boogie Preprocessor took 37.29 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:54:30,534 INFO L168 Benchmark]: RCFGBuilder took 628.29 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 97.5 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-10-27 19:54:30,536 INFO L168 Benchmark]: TraceAbstraction took 559.72 ms. Allocated memory is still 151.0 MB. Free memory was 97.1 MB in the beginning and 82.1 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-27 19:54:30,543 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 265.45 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 115.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.29 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 628.29 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 97.5 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 559.72 ms. Allocated memory is still 151.0 MB. Free memory was 97.1 MB in the beginning and 82.1 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int i = 1; [L39] struct list *l,m; [L40] l = &m [L41] l->next = 0 [L42] l->n = 0 [L44] CALL, EXPR append(l, 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; [L44] RET, EXPR append(l, 1) [L44] l = append(l, 1) [L45] CALL, EXPR append(l, 2) [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; [L45] RET, EXPR append(l, 2) [L45] l = append(l, 2) [L50] EXPR l->next [L50] EXPR l->next->next [L50] EXPR l->next->next->n [L50] COND TRUE l->next->next->n == 0 [L50] CALL err() [L10] CALL reach_error() [L3] __assert_fail("0", "recursive_list.i", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=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, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 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! Received shutdown request...