./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 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/recursive_list.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52c76a7df26fca079cfc43e405f2f619070583ff933a68f0bba20f0a9dce8e14 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:09:51,135 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:09:51,233 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:09:51,241 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:09:51,242 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:09:51,283 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:09:51,286 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:09:51,287 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:09:51,289 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:09:51,295 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:09:51,296 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:09:51,298 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:09:51,298 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:09:51,301 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:09:51,301 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:09:51,302 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:09:51,302 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:09:51,303 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:09:51,303 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:09:51,304 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:09:51,305 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:09:51,305 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:09:51,306 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:09:51,307 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:09:51,308 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:09:51,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:09:51,309 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:09:51,309 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:09:51,310 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:09:51,310 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:09:51,311 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:09:51,311 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:09:51,312 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:09:51,312 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:09:51,313 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:09:51,313 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:09:51,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:09:51,314 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:09:51,314 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:09:51,314 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:09:51,315 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:09:51,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:09:51,315 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:09:51,316 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:09:51,316 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:09:51,316 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52c76a7df26fca079cfc43e405f2f619070583ff933a68f0bba20f0a9dce8e14 [2023-11-19 04:09:51,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:09:51,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:09:51,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:09:51,650 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:09:51,651 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:09:51,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-regression/recursive_list.i [2023-11-19 04:09:55,446 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:09:55,706 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:09:55,707 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/sv-benchmarks/c/ldv-regression/recursive_list.i [2023-11-19 04:09:55,716 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/data/192730f70/c07c9029b0424ef1b300a411edb3b368/FLAG3d69043ad [2023-11-19 04:09:55,734 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/data/192730f70/c07c9029b0424ef1b300a411edb3b368 [2023-11-19 04:09:55,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:09:55,742 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:09:55,747 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:09:55,748 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:09:55,753 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:09:55,756 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:09:55" (1/1) ... [2023-11-19 04:09:55,758 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3469386a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:55, skipping insertion in model container [2023-11-19 04:09:55,758 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:09:55" (1/1) ... [2023-11-19 04:09:55,783 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:09:55,936 WARN L240 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_73d1162d-e778-4af2-9da4-23dca0a5d70c/sv-benchmarks/c/ldv-regression/recursive_list.i[409,422] [2023-11-19 04:09:55,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:09:55,970 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:09:55,983 WARN L240 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_73d1162d-e778-4af2-9da4-23dca0a5d70c/sv-benchmarks/c/ldv-regression/recursive_list.i[409,422] [2023-11-19 04:09:55,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:09:56,005 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:09:56,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56 WrapperNode [2023-11-19 04:09:56,006 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:09:56,007 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:09:56,008 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:09:56,008 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:09:56,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56" (1/1) ... [2023-11-19 04:09:56,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56" (1/1) ... [2023-11-19 04:09:56,049 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 51 [2023-11-19 04:09:56,050 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:09:56,051 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:09:56,051 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:09:56,051 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:09:56,061 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56" (1/1) ... [2023-11-19 04:09:56,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56" (1/1) ... [2023-11-19 04:09:56,078 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56" (1/1) ... [2023-11-19 04:09:56,079 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56" (1/1) ... [2023-11-19 04:09:56,088 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56" (1/1) ... [2023-11-19 04:09:56,092 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56" (1/1) ... [2023-11-19 04:09:56,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56" (1/1) ... [2023-11-19 04:09:56,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56" (1/1) ... [2023-11-19 04:09:56,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:09:56,098 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:09:56,098 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:09:56,098 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:09:56,099 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56" (1/1) ... [2023-11-19 04:09:56,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:09:56,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:09:56,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:09:56,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:09:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:09:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:09:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:09:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:09:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:09:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:09:56,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:09:56,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:09:56,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:09:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:09:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure append [2023-11-19 04:09:56,186 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2023-11-19 04:09:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:09:56,287 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:09:56,289 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:09:56,452 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:09:56,496 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:09:56,496 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:09:56,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:09:56 BoogieIcfgContainer [2023-11-19 04:09:56,502 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:09:56,505 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:09:56,506 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:09:56,510 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:09:56,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:09:55" (1/3) ... [2023-11-19 04:09:56,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2de716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:09:56, skipping insertion in model container [2023-11-19 04:09:56,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:56" (2/3) ... [2023-11-19 04:09:56,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2de716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:09:56, skipping insertion in model container [2023-11-19 04:09:56,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:09:56" (3/3) ... [2023-11-19 04:09:56,514 INFO L112 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2023-11-19 04:09:56,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:09:56,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:09:56,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:09:56,597 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, 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;@1e1f8008, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:09:56,597 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:09:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 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) [2023-11-19 04:09:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:09:56,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:09:56,611 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:09:56,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:09:56,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:09:56,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1960796674, now seen corresponding path program 1 times [2023-11-19 04:09:56,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:09:56,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77514333] [2023-11-19 04:09:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:09:56,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:09:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:09:56,879 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 04:09:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:09:57,006 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 04:09:57,009 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 04:09:57,010 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 04:09:57,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:09:57,017 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-19 04:09:57,023 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 04:09:57,038 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret6 [2023-11-19 04:09:57,040 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret7 [2023-11-19 04:09:57,040 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem9 [2023-11-19 04:09:57,043 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem10 could not be translated [2023-11-19 04:09:57,043 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem8 [2023-11-19 04:09:57,053 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:09:57 BoogieIcfgContainer [2023-11-19 04:09:57,053 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 04:09:57,054 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 04:09:57,054 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 04:09:57,055 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 04:09:57,055 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:09:56" (3/4) ... [2023-11-19 04:09:57,057 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-19 04:09:57,063 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret6 [2023-11-19 04:09:57,064 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret7 [2023-11-19 04:09:57,093 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem8 [2023-11-19 04:09:57,093 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem10 could not be translated [2023-11-19 04:09:57,093 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem9 [2023-11-19 04:09:57,137 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/witness.graphml [2023-11-19 04:09:57,137 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 04:09:57,138 INFO L158 Benchmark]: Toolchain (without parser) took 1395.92ms. Allocated memory was 155.2MB in the beginning and 197.1MB in the end (delta: 41.9MB). Free memory was 109.5MB in the beginning and 165.5MB in the end (delta: -56.0MB). Peak memory consumption was 55.8MB. Max. memory is 16.1GB. [2023-11-19 04:09:57,139 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 155.2MB. Free memory is still 100.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:09:57,140 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.24ms. Allocated memory is still 155.2MB. Free memory was 109.5MB in the beginning and 99.0MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 04:09:57,140 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.51ms. Allocated memory is still 155.2MB. Free memory was 99.0MB in the beginning and 97.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:09:57,141 INFO L158 Benchmark]: Boogie Preprocessor took 46.35ms. Allocated memory is still 155.2MB. Free memory was 97.4MB in the beginning and 96.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 04:09:57,141 INFO L158 Benchmark]: RCFGBuilder took 404.06ms. Allocated memory is still 155.2MB. Free memory was 96.2MB in the beginning and 82.9MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 04:09:57,142 INFO L158 Benchmark]: TraceAbstraction took 548.00ms. Allocated memory is still 155.2MB. Free memory was 82.3MB in the beginning and 59.8MB in the end (delta: 22.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-19 04:09:57,163 INFO L158 Benchmark]: Witness Printer took 83.06ms. Allocated memory was 155.2MB in the beginning and 197.1MB in the end (delta: 41.9MB). Free memory was 59.8MB in the beginning and 165.5MB in the end (delta: -105.7MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2023-11-19 04:09:57,165 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 155.2MB. Free memory is still 100.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.24ms. Allocated memory is still 155.2MB. Free memory was 109.5MB in the beginning and 99.0MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.51ms. Allocated memory is still 155.2MB. Free memory was 99.0MB in the beginning and 97.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 46.35ms. Allocated memory is still 155.2MB. Free memory was 97.4MB in the beginning and 96.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 404.06ms. Allocated memory is still 155.2MB. Free memory was 96.2MB in the beginning and 82.9MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 548.00ms. Allocated memory is still 155.2MB. Free memory was 82.3MB in the beginning and 59.8MB in the end (delta: 22.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Witness Printer took 83.06ms. Allocated memory was 155.2MB in the beginning and 197.1MB in the end (delta: 41.9MB). Free memory was 59.8MB in the beginning and 165.5MB in the end (delta: -105.7MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret6 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret7 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem9 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem8 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret6 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret7 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem8 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem9 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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; [L39] struct list *l,m; [L40] l = &m [L41] l->next = 0 [L42] l->n = 0 VAL [i=1, l={5:0}, m={5:0}] [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; [L44] RET, EXPR append(l, 1) VAL [i=1, l={5:0}, m={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; [L45] RET, EXPR append(l, 2) VAL [i=1, l={-1:0}, m={5:0}] [L45] l = append(l, 2) [L50] EXPR l->next [L50] EXPR l->next->next [L50] EXPR l->next->next->n VAL [i=1, l={-2:0}, m={5:0}] [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, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, 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=12occurred 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, 11 NumberOfCodeBlocks, 11 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! [2023-11-19 04:09:57,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d1162d-e778-4af2-9da4-23dca0a5d70c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (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