./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 b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/recursive_list.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52c76a7df26fca079cfc43e405f2f619070583ff933a68f0bba20f0a9dce8e14 ....................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:42:42,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:42:42,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:42:42,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:42:42,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:42:42,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:42:42,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:42:42,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:42:42,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:42:42,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:42:42,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:42:42,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:42:42,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:42:42,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:42:42,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:42:42,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:42:42,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:42:42,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:42:42,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:42:42,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:42:42,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:42:42,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:42:42,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:42:42,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:42:42,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:42:42,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:42:42,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:42:42,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:42:42,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:42:42,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:42:42,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:42:42,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:42:42,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:42:42,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:42:42,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:42:42,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:42:42,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:42:42,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:42:42,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:42:42,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:42:42,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:42:42,235 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 08:42:42,273 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:42:42,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:42:42,274 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:42:42,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:42:42,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:42:42,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:42:42,277 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:42:42,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:42:42,278 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:42:42,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:42:42,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:42:42,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:42:42,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:42:42,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:42:42,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:42:42,281 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:42:42,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:42:42,282 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:42:42,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:42:42,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:42:42,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:42:42,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:42:42,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:42:42,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:42:42,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:42:42,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:42:42,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:42:42,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:42:42,287 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:42:42,287 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:42:42,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:42:42,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:42:42,288 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52c76a7df26fca079cfc43e405f2f619070583ff933a68f0bba20f0a9dce8e14 [2021-10-28 08:42:42,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:42:42,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:42:42,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:42:42,640 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:42:42,640 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:42:42,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/ldv-regression/recursive_list.i [2021-10-28 08:42:42,727 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/data/88cf36a82/7e229c41ac1b46a282f2ab3595173ea0/FLAGea5b7bcb8 [2021-10-28 08:42:43,265 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:42:43,268 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/sv-benchmarks/c/ldv-regression/recursive_list.i [2021-10-28 08:42:43,282 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/data/88cf36a82/7e229c41ac1b46a282f2ab3595173ea0/FLAGea5b7bcb8 [2021-10-28 08:42:43,597 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/data/88cf36a82/7e229c41ac1b46a282f2ab3595173ea0 [2021-10-28 08:42:43,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:42:43,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:42:43,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:42:43,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:42:43,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:42:43,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:42:43" (1/1) ... [2021-10-28 08:42:43,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5a6ca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43, skipping insertion in model container [2021-10-28 08:42:43,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:42:43" (1/1) ... [2021-10-28 08:42:43,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:42:43,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:42:43,812 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/sv-benchmarks/c/ldv-regression/recursive_list.i[409,422] [2021-10-28 08:42:43,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:42:43,885 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:42:43,903 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/sv-benchmarks/c/ldv-regression/recursive_list.i[409,422] [2021-10-28 08:42:43,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:42:43,941 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:42:43,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43 WrapperNode [2021-10-28 08:42:43,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:42:43,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:42:43,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:42:43,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:42:43,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43" (1/1) ... [2021-10-28 08:42:43,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43" (1/1) ... [2021-10-28 08:42:44,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:42:44,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:42:44,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:42:44,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:42:44,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43" (1/1) ... [2021-10-28 08:42:44,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43" (1/1) ... [2021-10-28 08:42:44,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43" (1/1) ... [2021-10-28 08:42:44,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43" (1/1) ... [2021-10-28 08:42:44,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43" (1/1) ... [2021-10-28 08:42:44,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43" (1/1) ... [2021-10-28 08:42:44,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43" (1/1) ... [2021-10-28 08:42:44,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:42:44,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:42:44,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:42:44,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:42:44,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43" (1/1) ... [2021-10-28 08:42:44,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:42:44,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:42:44,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:42:44,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:42:44,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:42:44,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:42:44,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:42:44,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:42:44,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:42:44,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:42:44,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:42:44,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:42:44,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:42:44,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:42:44,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:42:44,551 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-28 08:42:44,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:42:44 BoogieIcfgContainer [2021-10-28 08:42:44,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:42:44,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:42:44,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:42:44,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:42:44,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:42:43" (1/3) ... [2021-10-28 08:42:44,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59038909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:42:44, skipping insertion in model container [2021-10-28 08:42:44,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:43" (2/3) ... [2021-10-28 08:42:44,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59038909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:42:44, skipping insertion in model container [2021-10-28 08:42:44,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:42:44" (3/3) ... [2021-10-28 08:42:44,575 INFO L111 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2021-10-28 08:42:44,582 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:42:44,582 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:42:44,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:42:44,654 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 08:42:44,654 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 08:42:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:42:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:42:44,678 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:44,679 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:44,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:42:44,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:44,687 INFO L85 PathProgramCache]: Analyzing trace with hash 87858985, now seen corresponding path program 1 times [2021-10-28 08:42:44,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:44,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157793511] [2021-10-28 08:42:44,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:44,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:42:44,929 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:42:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:42:45,048 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 08:42:45,060 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:42:45,068 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:42:45,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:42:45,074 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-10-28 08:42:45,078 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:42:45,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:42:45 BoogieIcfgContainer [2021-10-28 08:42:45,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:42:45,114 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:42:45,114 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:42:45,114 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:42:45,115 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:42:44" (3/4) ... [2021-10-28 08:42:45,118 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 08:42:45,198 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:42:45,198 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:42:45,200 INFO L168 Benchmark]: Toolchain (without parser) took 1597.39 ms. Allocated memory was 79.7 MB in the beginning and 104.9 MB in the end (delta: 25.2 MB). Free memory was 41.2 MB in the beginning and 72.6 MB in the end (delta: -31.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:42:45,207 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 79.7 MB. Free memory is still 57.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:42:45,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.83 ms. Allocated memory was 79.7 MB in the beginning and 104.9 MB in the end (delta: 25.2 MB). Free memory was 41.0 MB in the beginning and 80.1 MB in the end (delta: -39.1 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-10-28 08:42:45,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.95 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:42:45,209 INFO L168 Benchmark]: Boogie Preprocessor took 29.05 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 77.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:42:45,210 INFO L168 Benchmark]: RCFGBuilder took 507.63 ms. Allocated memory is still 104.9 MB. Free memory was 77.2 MB in the beginning and 65.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 08:42:45,210 INFO L168 Benchmark]: TraceAbstraction took 553.29 ms. Allocated memory is still 104.9 MB. Free memory was 65.3 MB in the beginning and 75.5 MB in the end (delta: -10.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:42:45,211 INFO L168 Benchmark]: Witness Printer took 84.52 ms. Allocated memory is still 104.9 MB. Free memory was 75.5 MB in the beginning and 72.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:42:45,214 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 79.7 MB. Free memory is still 57.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 337.83 ms. Allocated memory was 79.7 MB in the beginning and 104.9 MB in the end (delta: 25.2 MB). Free memory was 41.0 MB in the beginning and 80.1 MB in the end (delta: -39.1 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.95 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.05 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 77.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 507.63 ms. Allocated memory is still 104.9 MB. Free memory was 77.2 MB in the beginning and 65.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 553.29 ms. Allocated memory is still 104.9 MB. Free memory was 65.3 MB in the beginning and 75.5 MB in the end (delta: -10.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 84.52 ms. Allocated memory is still 104.9 MB. Free memory was 75.5 MB in the beginning and 72.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * 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 [L27] struct list *new_el; [L22] return malloc(8U); [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; VAL [i=1] [L44] l = append(l, 1) [L27] struct list *new_el; [L22] return malloc(8U); [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; VAL [i=1] [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 [L10] reach_error() VAL [i=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 8 NumberOfCodeBlocks, 8 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! [2021-10-28 08:42:45,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63302906-c9aa-487c-a8c7-9472dd626309/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...