./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/ldv-regression/recursive_list.i --full-output --witness-type violation_witness --validate ./svcomp-yaml-violation-generation.2024-08-01_14-26-22.files/Default/recursive_list.yml/witness.yml --preprocessor.replace.while.statements.and.if-then-else.statements false --icfgbuilder.size.of.a.code.block SequenceOfStatements --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26998269 Calling Ultimate with: /root/.sdkman/candidates/java/current/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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/ldv-regression/recursive_list.i ./svcomp-yaml-violation-generation.2024-08-01_14-26-22.files/Default/recursive_list.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --preprocessor.replace.while.statements.and.if-then-else.statements false --icfgbuilder.size.of.a.code.block SequenceOfStatements --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.yaml-violation-witnesses-2699826-m [2024-08-14 14:29:27,511 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-08-14 14:29:27,589 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-08-14 14:29:27,594 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-08-14 14:29:27,595 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-08-14 14:29:27,614 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-08-14 14:29:27,615 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-08-14 14:29:27,615 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-08-14 14:29:27,615 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-08-14 14:29:27,616 INFO L153 SettingsManager]: * Use memory slicer=true [2024-08-14 14:29:27,616 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-08-14 14:29:27,616 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-08-14 14:29:27,617 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-08-14 14:29:27,617 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-08-14 14:29:27,617 INFO L153 SettingsManager]: * Use SBE=true [2024-08-14 14:29:27,618 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-08-14 14:29:27,618 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-08-14 14:29:27,618 INFO L153 SettingsManager]: * sizeof long=4 [2024-08-14 14:29:27,619 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-08-14 14:29:27,619 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-08-14 14:29:27,619 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-08-14 14:29:27,619 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-08-14 14:29:27,620 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-08-14 14:29:27,620 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-08-14 14:29:27,620 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-08-14 14:29:27,620 INFO L153 SettingsManager]: * sizeof long double=12 [2024-08-14 14:29:27,621 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-08-14 14:29:27,621 INFO L153 SettingsManager]: * Use constant arrays=true [2024-08-14 14:29:27,621 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-08-14 14:29:27,621 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-08-14 14:29:27,622 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-08-14 14:29:27,622 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-08-14 14:29:27,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-08-14 14:29:27,622 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-08-14 14:29:27,623 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-08-14 14:29:27,623 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-08-14 14:29:27,623 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-08-14 14:29:27,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-08-14 14:29:27,623 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-08-14 14:29:27,624 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-08-14 14:29:27,624 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-08-14 14:29:27,624 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-08-14 14:29:27,624 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-08-14 14:29:27,624 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder: Size of a code block -> SequenceOfStatements [2024-08-14 14:29:27,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-08-14 14:29:27,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-08-14 14:29:27,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-08-14 14:29:27,843 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-08-14 14:29:27,844 INFO L274 PluginConnector]: Witness Parser initialized [2024-08-14 14:29:27,845 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./svcomp-yaml-violation-generation.2024-08-01_14-26-22.files/Default/recursive_list.yml/witness.yml [2024-08-14 14:29:27,912 INFO L270 PluginConnector]: Initializing CDTParser... [2024-08-14 14:29:27,912 INFO L274 PluginConnector]: CDTParser initialized [2024-08-14 14:29:27,912 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/recursive_list.i [2024-08-14 14:29:29,197 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-08-14 14:29:29,345 INFO L384 CDTParser]: Found 1 translation units. [2024-08-14 14:29:29,345 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/recursive_list.i [2024-08-14 14:29:29,350 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd1d7bd70/6f55c6d49fda428d96e0021da1f6799e/FLAG46e6188b2 [2024-08-14 14:29:29,758 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd1d7bd70/6f55c6d49fda428d96e0021da1f6799e [2024-08-14 14:29:29,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-08-14 14:29:29,764 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2024-08-14 14:29:29,765 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-08-14 14:29:29,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-08-14 14:29:29,770 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-08-14 14:29:29,771 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser VIOLATION_WITNESS 14.08 02:29:27" (1/2) ... [2024-08-14 14:29:29,771 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e3a9adf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator VIOLATION_WITNESS 14.08 02:29:29, skipping insertion in model container [2024-08-14 14:29:29,772 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser VIOLATION_WITNESS 14.08 02:29:27" (1/2) ... [2024-08-14 14:29:29,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6b7968ef and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator VIOLATION_WITNESS 14.08 02:29:29, skipping insertion in model container [2024-08-14 14:29:29,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.08 02:29:29" (2/2) ... [2024-08-14 14:29:29,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e3a9adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:29:29, skipping insertion in model container [2024-08-14 14:29:29,773 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.08 02:29:29" (2/2) ... [2024-08-14 14:29:29,791 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-08-14 14:29:29,910 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/recursive_list.i[409,422] [2024-08-14 14:29:29,933 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-08-14 14:29:29,941 INFO L200 MainTranslator]: Completed pre-run [2024-08-14 14:29:29,953 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/recursive_list.i[409,422] [2024-08-14 14:29:29,957 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-08-14 14:29:29,972 INFO L204 MainTranslator]: Completed translation [2024-08-14 14:29:29,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:29:29 WrapperNode [2024-08-14 14:29:29,973 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-08-14 14:29:29,974 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-08-14 14:29:29,974 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-08-14 14:29:29,974 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-08-14 14:29:29,983 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:29:29" (1/1) ... [2024-08-14 14:29:29,983 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:29:29" (1/1) ... [2024-08-14 14:29:29,988 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:29:29" (1/1) ... [2024-08-14 14:29:30,001 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]. [2024-08-14 14:29:30,002 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:29:29" (1/1) ... [2024-08-14 14:29:30,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:29:29" (1/1) ... [2024-08-14 14:29:30,008 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:29:29" (1/1) ... [2024-08-14 14:29:30,009 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:29:29" (1/1) ... [2024-08-14 14:29:30,010 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:29:29" (1/1) ... [2024-08-14 14:29:30,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-08-14 14:29:30,012 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-08-14 14:29:30,012 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-08-14 14:29:30,012 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-08-14 14:29:30,013 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:29:29" (1/1) ... [2024-08-14 14:29:30,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-08-14 14:29:30,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-08-14 14:29:30,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-08-14 14:29:30,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2024-08-14 14:29:30,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-08-14 14:29:30,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-08-14 14:29:30,094 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2024-08-14 14:29:30,094 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2024-08-14 14:29:30,094 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_memory [2024-08-14 14:29:30,094 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2024-08-14 14:29:30,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-08-14 14:29:30,095 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2024-08-14 14:29:30,096 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2024-08-14 14:29:30,096 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2024-08-14 14:29:30,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-08-14 14:29:30,096 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2024-08-14 14:29:30,096 INFO L130 BoogieDeclarations]: Found specification of procedure err [2024-08-14 14:29:30,097 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_memory [2024-08-14 14:29:30,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-08-14 14:29:30,097 INFO L130 BoogieDeclarations]: Found specification of procedure append [2024-08-14 14:29:30,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-08-14 14:29:30,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-08-14 14:29:30,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-08-14 14:29:30,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-08-14 14:29:30,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-08-14 14:29:30,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-08-14 14:29:30,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-08-14 14:29:30,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-08-14 14:29:30,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-08-14 14:29:30,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-08-14 14:29:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-08-14 14:29:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-08-14 14:29:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-08-14 14:29:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-08-14 14:29:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-08-14 14:29:30,184 INFO L273 CfgBuilder]: Building ICFG [2024-08-14 14:29:30,187 INFO L304 CfgBuilder]: Building CFG for each procedure with an implementation [2024-08-14 14:29:30,284 INFO L1266 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~malloc4.base, #t~malloc4.offset; [2024-08-14 14:29:30,349 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-08-14 14:29:30,350 INFO L327 CfgBuilder]: Performing block encoding [2024-08-14 14:29:30,360 INFO L349 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-08-14 14:29:30,360 INFO L354 CfgBuilder]: Removed 0 assume(true) statements. [2024-08-14 14:29:30,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.08 02:29:30 BoogieIcfgContainer [2024-08-14 14:29:30,360 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-08-14 14:29:30,364 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-08-14 14:29:30,365 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-08-14 14:29:30,368 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-08-14 14:29:30,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser VIOLATION_WITNESS 14.08 02:29:27" (1/4) ... [2024-08-14 14:29:30,369 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206fbb3f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction VIOLATION_WITNESS 14.08 02:29:30, skipping insertion in model container [2024-08-14 14:29:30,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.08 02:29:29" (2/4) ... [2024-08-14 14:29:30,369 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206fbb3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.08 02:29:30, skipping insertion in model container [2024-08-14 14:29:30,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.08 02:29:29" (3/4) ... [2024-08-14 14:29:30,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206fbb3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.08 02:29:30, skipping insertion in model container [2024-08-14 14:29:30,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.08 02:29:30" (4/4) ... [2024-08-14 14:29:30,372 INFO L119 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2024-08-14 14:29:30,373 WARN L130 eAbstractionObserver]: Found a witness in the YAML format. I will only consider traces that are accepted by the witness [2024-08-14 14:29:30,391 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-08-14 14:29:30,391 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-08-14 14:29:30,419 INFO L92 WitnessUtils]: Constructing product of automaton with 30 states and violation witness of the following lengths: [11] [2024-08-14 14:29:30,423 INFO L82 GeneralOperation]: Start removeDeadEnds. Operand has 30 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-08-14 14:29:30,462 INFO L88 GeneralOperation]: Finished removeDeadEnds. Reduced from 43 states to 30 states. [2024-08-14 14:29:30,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-08-14 14:29:30,488 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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;@6f8a5d4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-08-14 14:29:30,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-08-14 14:29:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2024-08-14 14:29:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-08-14 14:29:30,493 INFO L187 NwaCegarLoop]: Found error trace [2024-08-14 14:29:30,494 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-08-14 14:29:30,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errErr0ASSERT_VIOLATIONERROR_FUNCTION === [errErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-08-14 14:29:30,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-08-14 14:29:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1456495185, now seen corresponding path program 1 times [2024-08-14 14:29:30,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-08-14 14:29:30,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244670222] [2024-08-14 14:29:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-08-14 14:29:30,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-08-14 14:29:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-08-14 14:29:30,667 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-08-14 14:29:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-08-14 14:29:30,752 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-08-14 14:29:30,755 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-08-14 14:29:30,757 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location errErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-08-14 14:29:30,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-08-14 14:29:30,763 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-08-14 14:29:30,766 INFO L196 ceAbstractionStarter]: Computing trace abstraction results [2024-08-14 14:29:30,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.08 02:29:30 BoogieIcfgContainer [2024-08-14 14:29:30,786 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-08-14 14:29:30,787 INFO L158 Benchmark]: Toolchain (without parser) took 1023.62ms. Allocated memory is still 165.7MB. Free memory was 107.4MB in the beginning and 53.5MB in the end (delta: 53.9MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2024-08-14 14:29:30,787 INFO L158 Benchmark]: Witness Parser took 0.26ms. Allocated memory is still 165.7MB. Free memory is still 130.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-08-14 14:29:30,788 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 165.7MB. Free memory was 127.7MB in the beginning and 127.5MB in the end (delta: 176.2kB). There was no memory consumed. Max. memory is 16.1GB. [2024-08-14 14:29:30,788 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.73ms. Allocated memory is still 165.7MB. Free memory was 106.7MB in the beginning and 95.4MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-08-14 14:29:30,789 INFO L158 Benchmark]: Boogie Preprocessor took 37.86ms. Allocated memory is still 165.7MB. Free memory was 95.4MB in the beginning and 92.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-08-14 14:29:30,789 INFO L158 Benchmark]: IcfgBuilder took 348.38ms. Allocated memory is still 165.7MB. Free memory was 92.7MB in the beginning and 78.7MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-08-14 14:29:30,789 INFO L158 Benchmark]: TraceAbstraction took 421.81ms. Allocated memory is still 165.7MB. Free memory was 78.0MB in the beginning and 53.5MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-08-14 14:29:30,791 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.26ms. Allocated memory is still 165.7MB. Free memory is still 130.0MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.16ms. Allocated memory is still 165.7MB. Free memory was 127.7MB in the beginning and 127.5MB in the end (delta: 176.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 207.73ms. Allocated memory is still 165.7MB. Free memory was 106.7MB in the beginning and 95.4MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.86ms. Allocated memory is still 165.7MB. Free memory was 95.4MB in the beginning and 92.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * IcfgBuilder took 348.38ms. Allocated memory is still 165.7MB. Free memory was 92.7MB in the beginning and 78.7MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 421.81ms. Allocated memory is still 165.7MB. Free memory was 78.0MB in the beginning and 53.5MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 10]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i = 1; VAL [\old(i)=53, i=1] [L39] struct list *l,m; [L40] l = &m [L41] l->next = 0 [L42] l->n = 0 VAL [i=1, l={5:0}] [L44] CALL, EXPR append(l, 1) VAL [\old(l)={5:0}, \old(n)=1, i=1] [L27] struct list *new_el; VAL [\old(l)={5:0}, \old(n)=1, i=1, l={5:0}, n=1] [L29] CALL, EXPR allocate_memory() VAL [i=1] [L22] return malloc(8U); [L29] RET, EXPR allocate_memory() VAL [\old(l)={5:0}, \old(n)=1, i=1, l={5:0}, n=1] [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 [\old(l)={-1:0}, \old(n)=2, i=1] [L27] struct list *new_el; VAL [\old(l)={-1:0}, \old(n)=2, i=1, l={-1:0}, n=2] [L29] CALL, EXPR allocate_memory() VAL [i=1] [L22] return malloc(8U); [L29] RET, EXPR allocate_memory() VAL [\old(l)={-1:0}, \old(n)=2, i=1, l={-1:0}, n=2] [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, l={-1:0}] [L50] COND TRUE l->next->next->n == 0 [L50] CALL err() VAL [i=1] [L10] reach_error() VAL [i=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 33 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: 0.1s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 29 NumberOfCodeBlocks, 29 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! [2024-08-14 14:29:30,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE