./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 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 --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 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 06:27:09,834 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 06:27:09,902 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 06:27:09,907 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 06:27:09,909 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 06:27:09,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 06:27:09,930 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 06:27:09,930 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 06:27:09,931 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 06:27:09,932 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 06:27:09,933 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 06:27:09,933 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 06:27:09,933 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 06:27:09,934 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 06:27:09,935 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 06:27:09,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 06:27:09,936 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 06:27:09,936 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 06:27:09,936 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 06:27:09,936 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 06:27:09,936 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 06:27:09,941 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 06:27:09,941 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 06:27:09,941 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 06:27:09,942 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 06:27:09,942 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 06:27:09,942 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 06:27:09,942 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 06:27:09,942 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 06:27:09,943 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 06:27:09,943 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 06:27:09,943 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 06:27:09,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 06:27:09,943 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 06:27:09,943 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 06:27:09,944 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 06:27:09,944 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 06:27:09,944 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 06:27:09,944 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 06:27:09,944 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 06:27:09,944 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 06:27:09,945 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 06:27:09,945 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52c76a7df26fca079cfc43e405f2f619070583ff933a68f0bba20f0a9dce8e14 [2024-11-16 06:27:10,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 06:27:10,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 06:27:10,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 06:27:10,175 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 06:27:10,176 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 06:27:10,177 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/recursive_list.i [2024-11-16 06:27:11,622 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 06:27:11,757 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 06:27:11,758 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/recursive_list.i [2024-11-16 06:27:11,766 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e24cf42/e2412d9de97940fa80478da001f5cc87/FLAGa854226c3 [2024-11-16 06:27:11,776 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e24cf42/e2412d9de97940fa80478da001f5cc87 [2024-11-16 06:27:11,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 06:27:11,778 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 06:27:11,779 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 06:27:11,779 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 06:27:11,787 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 06:27:11,787 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:11,788 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc5c157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11, skipping insertion in model container [2024-11-16 06:27:11,788 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:11,801 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 06:27:11,929 WARN L250 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] [2024-11-16 06:27:11,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 06:27:11,961 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 06:27:11,969 WARN L250 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] [2024-11-16 06:27:11,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 06:27:11,991 INFO L204 MainTranslator]: Completed translation [2024-11-16 06:27:11,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11 WrapperNode [2024-11-16 06:27:11,992 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 06:27:11,993 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 06:27:11,993 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 06:27:11,993 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 06:27:11,999 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:12,006 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:12,019 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2024-11-16 06:27:12,020 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 06:27:12,021 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 06:27:12,021 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 06:27:12,021 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 06:27:12,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:12,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:12,034 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:12,045 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-16 06:27:12,045 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:12,046 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:12,052 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:12,053 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:12,053 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:12,054 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:12,059 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 06:27:12,060 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 06:27:12,060 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 06:27:12,060 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 06:27:12,061 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (1/1) ... [2024-11-16 06:27:12,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 06:27:12,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:27:12,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 06:27:12,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 06:27:12,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-16 06:27:12,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-16 06:27:12,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 06:27:12,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 06:27:12,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 06:27:12,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 06:27:12,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-16 06:27:12,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-16 06:27:12,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 06:27:12,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 06:27:12,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 06:27:12,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 06:27:12,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 06:27:12,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 06:27:12,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 06:27:12,139 INFO L130 BoogieDeclarations]: Found specification of procedure append [2024-11-16 06:27:12,139 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2024-11-16 06:27:12,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 06:27:12,225 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 06:27:12,227 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 06:27:12,343 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc allocate_memory_#t~malloc4#1.base, allocate_memory_#t~malloc4#1.offset; [2024-11-16 06:27:12,359 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-11-16 06:27:12,360 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 06:27:12,369 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 06:27:12,369 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 06:27:12,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:27:12 BoogieIcfgContainer [2024-11-16 06:27:12,369 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 06:27:12,371 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 06:27:12,371 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 06:27:12,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 06:27:12,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 06:27:11" (1/3) ... [2024-11-16 06:27:12,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25769d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 06:27:12, skipping insertion in model container [2024-11-16 06:27:12,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:27:11" (2/3) ... [2024-11-16 06:27:12,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25769d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 06:27:12, skipping insertion in model container [2024-11-16 06:27:12,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:27:12" (3/3) ... [2024-11-16 06:27:12,376 INFO L112 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2024-11-16 06:27:12,388 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 06:27:12,389 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 06:27:12,434 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 06:27:12,439 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@14bb954e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 06:27:12,440 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 06:27:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 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) [2024-11-16 06:27:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-16 06:27:12,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:27:12,449 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:27:12,449 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:27:12,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:27:12,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1070791010, now seen corresponding path program 1 times [2024-11-16 06:27:12,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:27:12,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706715510] [2024-11-16 06:27:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:27:12,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:27:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 06:27:12,650 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 06:27:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 06:27:12,744 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 06:27:12,745 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 06:27:12,746 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-16 06:27:12,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 06:27:12,751 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-16 06:27:12,767 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-16 06:27:12,769 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 06:27:12 BoogieIcfgContainer [2024-11-16 06:27:12,769 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-16 06:27:12,770 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-16 06:27:12,770 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-16 06:27:12,770 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-16 06:27:12,770 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:27:12" (3/4) ... [2024-11-16 06:27:12,771 INFO L137 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-16 06:27:12,802 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-16 06:27:12,802 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-16 06:27:12,803 INFO L158 Benchmark]: Toolchain (without parser) took 1024.91ms. Allocated memory was 163.6MB in the beginning and 251.7MB in the end (delta: 88.1MB). Free memory was 111.2MB in the beginning and 211.2MB in the end (delta: -100.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-16 06:27:12,804 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 163.6MB. Free memory was 123.0MB in the beginning and 122.8MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-16 06:27:12,804 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.28ms. Allocated memory is still 163.6MB. Free memory was 111.2MB in the beginning and 98.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-16 06:27:12,804 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.08ms. Allocated memory is still 163.6MB. Free memory was 98.6MB in the beginning and 97.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 06:27:12,805 INFO L158 Benchmark]: Boogie Preprocessor took 38.84ms. Allocated memory is still 163.6MB. Free memory was 97.0MB in the beginning and 94.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 06:27:12,805 INFO L158 Benchmark]: IcfgBuilder took 309.56ms. Allocated memory is still 163.6MB. Free memory was 94.9MB in the beginning and 82.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-16 06:27:12,805 INFO L158 Benchmark]: TraceAbstraction took 398.25ms. Allocated memory was 163.6MB in the beginning and 251.7MB in the end (delta: 88.1MB). Free memory was 81.5MB in the beginning and 213.3MB in the end (delta: -131.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-16 06:27:12,806 INFO L158 Benchmark]: Witness Printer took 32.89ms. Allocated memory is still 251.7MB. Free memory was 213.3MB in the beginning and 211.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 06:27:12,808 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 163.6MB. Free memory was 123.0MB in the beginning and 122.8MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 213.28ms. Allocated memory is still 163.6MB. Free memory was 111.2MB in the beginning and 98.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.08ms. Allocated memory is still 163.6MB. Free memory was 98.6MB in the beginning and 97.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.84ms. Allocated memory is still 163.6MB. Free memory was 97.0MB in the beginning and 94.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * IcfgBuilder took 309.56ms. Allocated memory is still 163.6MB. Free memory was 94.9MB in the beginning and 82.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 398.25ms. Allocated memory was 163.6MB in the beginning and 251.7MB in the end (delta: 88.1MB). Free memory was 81.5MB in the beginning and 213.3MB in the end (delta: -131.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 32.89ms. Allocated memory is still 251.7MB. Free memory was 213.3MB in the beginning and 211.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 10]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i = 1; VAL [i=1] [L39] struct list *l,m; [L40] l = &m [L41] l->next = 0 [L42] l->n = 0 VAL [i=1] [L44] CALL, EXPR append(l, 1) VAL [i=1] [L27] struct list *new_el; [L29] CALL, EXPR allocate_memory() [L22] return malloc(8U); [L29] RET, EXPR allocate_memory() [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; VAL [\old(l)={5:0}, \old(n)=1, \result={-1:0}, i=1] [L44] RET, EXPR append(l, 1) VAL [i=1, l={5:0}] [L44] l = append(l, 1) [L45] CALL, EXPR append(l, 2) VAL [i=1] [L27] struct list *new_el; [L29] CALL, EXPR allocate_memory() [L22] return malloc(8U); [L29] RET, EXPR allocate_memory() [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; VAL [\old(l)={-1:0}, \old(n)=2, \result={-2:0}, i=1] [L45] RET, EXPR append(l, 2) VAL [i=1, l={-1:0}] [L45] l = append(l, 2) [L50] EXPR l->next [L50] EXPR l->next->next [L50] EXPR l->next->next->n VAL [i=1] [L50] COND TRUE l->next->next->n == 0 [L50] CALL err() [L10] reach_error() VAL [i=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 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! [2024-11-16 06:27:12,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE