./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 4fc63b2a 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_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/recursive_list.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2 --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 0.2.5-dev-4fc63b2 [2024-11-02 12:22:48,096 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:22:48,189 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:22:48,201 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:22:48,202 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:22:48,245 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:22:48,246 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:22:48,246 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:22:48,247 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:22:48,247 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:22:48,248 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:22:48,248 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:22:48,249 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:22:48,249 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:22:48,250 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:22:48,250 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:22:48,253 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:22:48,254 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:22:48,254 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:22:48,255 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:22:48,255 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:22:48,259 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:22:48,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:22:48,260 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:22:48,261 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:22:48,261 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:22:48,261 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:22:48,262 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:22:48,262 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:22:48,262 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:22:48,263 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:22:48,264 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:22:48,265 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:22:48,266 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:22:48,266 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:22:48,266 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:22:48,266 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:22:48,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:22:48,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:22:48,267 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:22:48,267 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:22:48,268 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:22:48,268 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:22:48,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:22:48,269 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:22:48,269 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:22:48,269 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:22:48,269 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_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52c76a7df26fca079cfc43e405f2f619070583ff933a68f0bba20f0a9dce8e14 [2024-11-02 12:22:48,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:22:48,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:22:48,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:22:48,589 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:22:48,589 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:22:48,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/ldv-regression/recursive_list.i Unable to find full path for "g++" [2024-11-02 12:22:50,687 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:22:50,864 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:22:50,864 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/sv-benchmarks/c/ldv-regression/recursive_list.i [2024-11-02 12:22:50,872 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/data/c6aa21d75/82ed11f6feb7494cbf2ebc45c9a6f3ef/FLAG555d7589d [2024-11-02 12:22:51,260 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/data/c6aa21d75/82ed11f6feb7494cbf2ebc45c9a6f3ef [2024-11-02 12:22:51,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:22:51,263 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:22:51,264 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:22:51,264 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:22:51,269 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:22:51,270 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,271 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@126ff3bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51, skipping insertion in model container [2024-11-02 12:22:51,271 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,298 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:22:51,496 WARN L251 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_26a1c830-066c-42a5-977f-baedbcb302d3/sv-benchmarks/c/ldv-regression/recursive_list.i[409,422] [2024-11-02 12:22:51,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:22:51,528 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:22:51,540 WARN L251 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_26a1c830-066c-42a5-977f-baedbcb302d3/sv-benchmarks/c/ldv-regression/recursive_list.i[409,422] [2024-11-02 12:22:51,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:22:51,563 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:22:51,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51 WrapperNode [2024-11-02 12:22:51,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:22:51,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:22:51,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:22:51,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:22:51,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,583 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,605 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2024-11-02 12:22:51,607 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:22:51,608 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:22:51,609 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:22:51,609 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:22:51,618 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,624 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,632 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,638 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:22:51,639 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:22:51,639 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:22:51,639 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:22:51,640 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51" (1/1) ... [2024-11-02 12:22:51,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:22:51,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:22:51,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:22:51,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:22:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:22:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:22:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:22:51,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:22:51,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:22:51,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:22:51,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:22:51,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:22:51,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:22:51,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:22:51,700 INFO L130 BoogieDeclarations]: Found specification of procedure append [2024-11-02 12:22:51,700 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2024-11-02 12:22:51,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:22:51,781 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:22:51,783 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:22:51,944 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-11-02 12:22:51,945 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:22:51,993 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:22:51,993 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-02 12:22:51,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:22:51 BoogieIcfgContainer [2024-11-02 12:22:51,994 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:22:51,997 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:22:51,997 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:22:52,001 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:22:52,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:22:51" (1/3) ... [2024-11-02 12:22:52,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c716bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:22:52, skipping insertion in model container [2024-11-02 12:22:52,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:51" (2/3) ... [2024-11-02 12:22:52,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c716bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:22:52, skipping insertion in model container [2024-11-02 12:22:52,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:22:51" (3/3) ... [2024-11-02 12:22:52,007 INFO L112 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2024-11-02 12:22:52,026 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:22:52,026 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:22:52,102 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:22:52,108 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=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;@42841c6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:22:52,109 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:22:52,112 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) [2024-11-02 12:22:52,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-02 12:22:52,119 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:52,120 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:22:52,121 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:52,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:52,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1989535423, now seen corresponding path program 1 times [2024-11-02 12:22:52,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:52,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700131757] [2024-11-02 12:22:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:52,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-02 12:22:52,437 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-02 12:22:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-02 12:22:52,551 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-02 12:22:52,553 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-02 12:22:52,555 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-02 12:22:52,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:22:52,563 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-02 12:22:52,598 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-02 12:22:52,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 12:22:52 BoogieIcfgContainer [2024-11-02 12:22:52,604 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-02 12:22:52,605 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-02 12:22:52,605 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-02 12:22:52,606 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-02 12:22:52,606 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:22:51" (3/4) ... [2024-11-02 12:22:52,608 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-02 12:22:52,665 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/witness.graphml [2024-11-02 12:22:52,669 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-02 12:22:52,670 INFO L158 Benchmark]: Toolchain (without parser) took 1407.03ms. Allocated memory was 125.8MB in the beginning and 163.6MB in the end (delta: 37.7MB). Free memory was 88.8MB in the beginning and 117.6MB in the end (delta: -28.8MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2024-11-02 12:22:52,671 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 125.8MB. Free memory is still 72.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 12:22:52,671 INFO L158 Benchmark]: CACSL2BoogieTranslator took 300.08ms. Allocated memory is still 125.8MB. Free memory was 88.8MB in the beginning and 76.3MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-02 12:22:52,672 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.59ms. Allocated memory is still 125.8MB. Free memory was 76.3MB in the beginning and 74.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:22:52,673 INFO L158 Benchmark]: Boogie Preprocessor took 30.12ms. Allocated memory is still 125.8MB. Free memory was 74.5MB in the beginning and 73.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:22:52,674 INFO L158 Benchmark]: RCFGBuilder took 355.25ms. Allocated memory is still 125.8MB. Free memory was 73.3MB in the beginning and 59.9MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-02 12:22:52,675 INFO L158 Benchmark]: TraceAbstraction took 607.35ms. Allocated memory was 125.8MB in the beginning and 163.6MB in the end (delta: 37.7MB). Free memory was 59.1MB in the beginning and 119.7MB in the end (delta: -60.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 12:22:52,676 INFO L158 Benchmark]: Witness Printer took 64.56ms. Allocated memory is still 163.6MB. Free memory was 119.7MB in the beginning and 117.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:22:52,681 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 125.8MB. Free memory is still 72.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 300.08ms. Allocated memory is still 125.8MB. Free memory was 88.8MB in the beginning and 76.3MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.59ms. Allocated memory is still 125.8MB. Free memory was 76.3MB in the beginning and 74.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.12ms. Allocated memory is still 125.8MB. Free memory was 74.5MB in the beginning and 73.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 355.25ms. Allocated memory is still 125.8MB. Free memory was 73.3MB in the beginning and 59.9MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 607.35ms. Allocated memory was 125.8MB in the beginning and 163.6MB in the end (delta: 37.7MB). Free memory was 59.1MB in the beginning and 119.7MB in the end (delta: -60.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 64.56ms. Allocated memory is still 163.6MB. Free memory was 119.7MB in the beginning and 117.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 10]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i = 1; [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 [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}] [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}] [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() [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: 0.5s, 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! [2024-11-02 12:22:52,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26a1c830-066c-42a5-977f-baedbcb302d3/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE