/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 [2020-10-28 14:38:16,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:38:16,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:38:16,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:38:16,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:38:16,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:38:16,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:38:16,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:38:16,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:38:16,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:38:16,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:38:16,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:38:16,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:38:16,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:38:16,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:38:16,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:38:16,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:38:16,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:38:16,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:38:16,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:38:16,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:38:16,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:38:16,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:38:16,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:38:16,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:38:16,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:38:16,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:38:16,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:38:16,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:38:16,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:38:16,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:38:16,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:38:16,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:38:16,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:38:16,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:38:16,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:38:16,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:38:16,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:38:16,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:38:16,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:38:16,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:38:16,503 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 [2020-10-28 14:38:16,551 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:38:16,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:38:16,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:38:16,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:38:16,556 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:38:16,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:38:16,557 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:38:16,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:38:16,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:38:16,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:38:16,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:38:16,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:38:16,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:38:16,559 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:38:16,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:38:16,559 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:38:16,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:38:16,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:38:16,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:38:16,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:38:16,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:38:16,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:38:16,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:38:16,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:38:16,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:38:16,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:38:16,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:38:16,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:38:16,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:38:16,562 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:38:16,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:38:17,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:38:17,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:38:17,007 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:38:17,008 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:38:17,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-10-28 14:38:17,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be994c99c/c93b3e86955d432884df0533adf7e1e8/FLAG50ccae41d [2020-10-28 14:38:17,673 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:38:17,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-10-28 14:38:17,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be994c99c/c93b3e86955d432884df0533adf7e1e8/FLAG50ccae41d [2020-10-28 14:38:18,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be994c99c/c93b3e86955d432884df0533adf7e1e8 [2020-10-28 14:38:18,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:38:18,059 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:38:18,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:38:18,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:38:18,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:38:18,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:38:18" (1/1) ... [2020-10-28 14:38:18,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229e11d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:18, skipping insertion in model container [2020-10-28 14:38:18,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:38:18" (1/1) ... [2020-10-28 14:38:18,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:38:18,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:38:18,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:38:18,358 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:38:18,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:38:18,395 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:38:18,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:18 WrapperNode [2020-10-28 14:38:18,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:38:18,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:38:18,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:38:18,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:38:18,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:18" (1/1) ... [2020-10-28 14:38:18,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:18" (1/1) ... [2020-10-28 14:38:18,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:18" (1/1) ... [2020-10-28 14:38:18,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:18" (1/1) ... [2020-10-28 14:38:18,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:18" (1/1) ... [2020-10-28 14:38:18,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:18" (1/1) ... [2020-10-28 14:38:18,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:18" (1/1) ... [2020-10-28 14:38:18,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:38:18,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:38:18,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:38:18,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:38:18,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:18" (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 [2020-10-28 14:38:18,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:38:18,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:38:18,515 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:38:18,515 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-10-28 14:38:18,515 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_memory [2020-10-28 14:38:18,516 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2020-10-28 14:38:18,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:38:18,516 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:38:18,516 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:38:18,516 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:38:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:38:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:38:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-10-28 14:38:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_memory [2020-10-28 14:38:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:38:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure append [2020-10-28 14:38:18,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:38:18,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:38:18,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:38:18,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:38:18,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:38:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:38:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:38:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:38:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:38:18,791 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:38:18,791 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 14:38:18,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:38:18 BoogieIcfgContainer [2020-10-28 14:38:18,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:38:18,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:38:18,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:38:18,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:38:18,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:38:18" (1/3) ... [2020-10-28 14:38:18,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b987409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:38:18, skipping insertion in model container [2020-10-28 14:38:18,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:18" (2/3) ... [2020-10-28 14:38:18,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b987409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:38:18, skipping insertion in model container [2020-10-28 14:38:18,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:38:18" (3/3) ... [2020-10-28 14:38:18,801 INFO L111 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2020-10-28 14:38:18,813 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:38:18,818 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:38:18,844 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:38:18,893 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:38:18,893 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:38:18,893 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:38:18,893 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:38:18,893 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:38:18,894 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:38:18,894 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:38:18,903 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:38:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-28 14:38:18,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:38:18,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:18,958 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] [2020-10-28 14:38:18,959 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:18,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:18,966 INFO L82 PathProgramCache]: Analyzing trace with hash 598284727, now seen corresponding path program 1 times [2020-10-28 14:38:18,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:18,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690629191] [2020-10-28 14:38:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:38:19,232 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:38:19,234 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:38:19,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:38:19,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:38:19 BoogieIcfgContainer [2020-10-28 14:38:19,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:38:19,258 INFO L168 Benchmark]: Toolchain (without parser) took 1203.26 ms. Allocated memory is still 155.2 MB. Free memory was 130.5 MB in the beginning and 86.7 MB in the end (delta: 43.8 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:38:19,259 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 125.8 MB. Free memory is still 85.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:38:19,260 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.01 ms. Allocated memory is still 155.2 MB. Free memory was 129.9 MB in the beginning and 120.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:38:19,261 INFO L168 Benchmark]: Boogie Preprocessor took 38.42 ms. Allocated memory is still 155.2 MB. Free memory was 120.2 MB in the beginning and 118.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:38:19,262 INFO L168 Benchmark]: RCFGBuilder took 356.19 ms. Allocated memory is still 155.2 MB. Free memory was 118.7 MB in the beginning and 102.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-10-28 14:38:19,262 INFO L168 Benchmark]: TraceAbstraction took 460.44 ms. Allocated memory is still 155.2 MB. Free memory was 101.8 MB in the beginning and 86.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-28 14:38:19,266 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 125.8 MB. Free memory is still 85.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 333.01 ms. Allocated memory is still 155.2 MB. Free memory was 129.9 MB in the beginning and 120.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.42 ms. Allocated memory is still 155.2 MB. Free memory was 120.2 MB in the beginning and 118.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 356.19 ms. Allocated memory is still 155.2 MB. Free memory was 118.7 MB in the beginning and 102.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 460.44 ms. Allocated memory is still 155.2 MB. Free memory was 101.8 MB in the beginning and 86.7 MB in the end (delta: 15.2 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: 0.3s, 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, 0.1s 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...