./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/splice-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/splice-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3368805c1b8fd734b0faf0a6dc34f33a5f2dfc4632d20a018a29950383fb6a5c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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-e943c26 [2021-10-20 05:38:56,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:38:56,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:38:56,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:38:56,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:38:56,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:38:56,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:38:56,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:38:56,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:38:56,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:38:56,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:38:56,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:38:56,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:38:56,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:38:56,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:38:56,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:38:56,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:38:56,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:38:56,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:38:56,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:38:56,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:38:56,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:38:56,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:38:56,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:38:56,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:38:56,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:38:56,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:38:56,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:38:56,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:38:56,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:38:56,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:38:56,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:38:56,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:38:56,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:38:56,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:38:56,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:38:56,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:38:56,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:38:56,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:38:56,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:38:56,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:38:56,602 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:38:56,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:38:56,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:38:56,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:38:56,630 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:38:56,630 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:38:56,630 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:38:56,630 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:38:56,631 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:38:56,631 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:38:56,631 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:38:56,632 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:38:56,632 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:38:56,632 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:38:56,633 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:38:56,633 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:38:56,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:38:56,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:38:56,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:38:56,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:38:56,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:38:56,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:38:56,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:38:56,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:38:56,636 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:38:56,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:38:56,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:38:56,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:38:56,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:38:56,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:38:56,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:38:56,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:38:56,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:38:56,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:38:56,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:38:56,638 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:38:56,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:38:56,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:38:56,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:38:56,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:38:56,640 INFO L138 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_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3368805c1b8fd734b0faf0a6dc34f33a5f2dfc4632d20a018a29950383fb6a5c [2021-10-20 05:38:56,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:38:56,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:38:56,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:38:56,898 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:38:56,899 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:38:56,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/list-properties/splice-1.i [2021-10-20 05:38:56,980 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/data/32242ed63/034dea4af1f54270af21f88d6a654c29/FLAGee47a4d6a [2021-10-20 05:38:57,477 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:38:57,480 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/sv-benchmarks/c/list-properties/splice-1.i [2021-10-20 05:38:57,506 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/data/32242ed63/034dea4af1f54270af21f88d6a654c29/FLAGee47a4d6a [2021-10-20 05:38:57,807 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/data/32242ed63/034dea4af1f54270af21f88d6a654c29 [2021-10-20 05:38:57,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:38:57,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:38:57,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:38:57,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:38:57,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:38:57,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:38:57" (1/1) ... [2021-10-20 05:38:57,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5980db05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:57, skipping insertion in model container [2021-10-20 05:38:57,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:38:57" (1/1) ... [2021-10-20 05:38:57,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:38:57,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:38:58,175 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_7ad8bb16-1a0d-482f-8572-63666fe0ef17/sv-benchmarks/c/list-properties/splice-1.i[23721,23734] [2021-10-20 05:38:58,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:38:58,187 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:38:58,229 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_7ad8bb16-1a0d-482f-8572-63666fe0ef17/sv-benchmarks/c/list-properties/splice-1.i[23721,23734] [2021-10-20 05:38:58,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:38:58,260 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:38:58,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:58 WrapperNode [2021-10-20 05:38:58,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:38:58,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:38:58,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:38:58,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:38:58,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:58" (1/1) ... [2021-10-20 05:38:58,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:58" (1/1) ... [2021-10-20 05:38:58,310 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:38:58,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:38:58,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:38:58,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:38:58,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:58" (1/1) ... [2021-10-20 05:38:58,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:58" (1/1) ... [2021-10-20 05:38:58,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:58" (1/1) ... [2021-10-20 05:38:58,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:58" (1/1) ... [2021-10-20 05:38:58,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:58" (1/1) ... [2021-10-20 05:38:58,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:58" (1/1) ... [2021-10-20 05:38:58,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:58" (1/1) ... [2021-10-20 05:38:58,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:38:58,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:38:58,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:38:58,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:38:58,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:58" (1/1) ... [2021-10-20 05:38:58,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:38:58,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:38:58,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:38:58,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:38:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-20 05:38:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-20 05:38:58,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-20 05:38:58,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-20 05:38:58,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:38:58,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-20 05:38:58,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:38:58,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:38:58,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:38:58,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:38:58,935 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-20 05:38:58,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:38:58 BoogieIcfgContainer [2021-10-20 05:38:58,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:38:58,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:38:58,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:38:58,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:38:58,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:38:57" (1/3) ... [2021-10-20 05:38:58,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ce39dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:38:58, skipping insertion in model container [2021-10-20 05:38:58,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:58" (2/3) ... [2021-10-20 05:38:58,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ce39dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:38:58, skipping insertion in model container [2021-10-20 05:38:58,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:38:58" (3/3) ... [2021-10-20 05:38:58,956 INFO L111 eAbstractionObserver]: Analyzing ICFG splice-1.i [2021-10-20 05:38:58,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:38:58,962 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:38:59,024 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:38:59,030 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=FINITE_AUTOMATA, 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 [2021-10-20 05:38:59,031 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 05:38:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 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) [2021-10-20 05:38:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-20 05:38:59,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:59,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:38:59,052 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:38:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:59,058 INFO L82 PathProgramCache]: Analyzing trace with hash 248657047, now seen corresponding path program 1 times [2021-10-20 05:38:59,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:59,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736625089] [2021-10-20 05:38:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:59,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:59,244 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:59,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736625089] [2021-10-20 05:38:59,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736625089] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:59,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:59,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:38:59,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031875606] [2021-10-20 05:38:59,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-20 05:38:59,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-20 05:38:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 05:38:59,278 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-10-20 05:38:59,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:59,294 INFO L93 Difference]: Finished difference Result 33 states and 49 transitions. [2021-10-20 05:38:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-20 05:38:59,297 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) Word has length 10 [2021-10-20 05:38:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:59,309 INFO L225 Difference]: With dead ends: 33 [2021-10-20 05:38:59,309 INFO L226 Difference]: Without dead ends: 16 [2021-10-20 05:38:59,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 05:38:59,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-20 05:38:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-20 05:38:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2021-10-20 05:38:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-10-20 05:38:59,360 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2021-10-20 05:38:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:59,361 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-10-20 05:38:59,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-10-20 05:38:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-10-20 05:38:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-20 05:38:59,362 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:59,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:38:59,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:38:59,363 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:38:59,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:59,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1597106802, now seen corresponding path program 1 times [2021-10-20 05:38:59,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:59,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341688839] [2021-10-20 05:38:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:59,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:59,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:59,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341688839] [2021-10-20 05:38:59,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341688839] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:59,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:59,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:38:59,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687979819] [2021-10-20 05:38:59,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:38:59,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:59,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:38:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:38:59,517 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-10-20 05:38:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:59,591 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2021-10-20 05:38:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:38:59,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) Word has length 12 [2021-10-20 05:38:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:59,593 INFO L225 Difference]: With dead ends: 33 [2021-10-20 05:38:59,593 INFO L226 Difference]: Without dead ends: 22 [2021-10-20 05:38:59,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:38:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-20 05:38:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2021-10-20 05:38:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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) [2021-10-20 05:38:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-10-20 05:38:59,605 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2021-10-20 05:38:59,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:59,606 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-10-20 05:38:59,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-10-20 05:38:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-10-20 05:38:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-20 05:38:59,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:59,608 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:38:59,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 05:38:59,611 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:38:59,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:59,612 INFO L82 PathProgramCache]: Analyzing trace with hash -743682125, now seen corresponding path program 1 times [2021-10-20 05:38:59,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:59,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81028354] [2021-10-20 05:38:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:59,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 05:38:59,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:59,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81028354] [2021-10-20 05:38:59,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81028354] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:59,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:59,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:38:59,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747229889] [2021-10-20 05:38:59,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:38:59,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:59,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:38:59,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:38:59,741 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-20 05:38:59,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:59,805 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-10-20 05:38:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:38:59,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) Word has length 15 [2021-10-20 05:38:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:59,807 INFO L225 Difference]: With dead ends: 32 [2021-10-20 05:38:59,807 INFO L226 Difference]: Without dead ends: 26 [2021-10-20 05:38:59,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:38:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-20 05:38:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-10-20 05:38:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2021-10-20 05:38:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-20 05:38:59,818 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2021-10-20 05:38:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:59,819 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-20 05:38:59,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-20 05:38:59,819 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-20 05:38:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-20 05:38:59,820 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:59,821 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:38:59,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 05:38:59,821 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:38:59,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:59,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1577954531, now seen corresponding path program 1 times [2021-10-20 05:38:59,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:59,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882298976] [2021-10-20 05:38:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:59,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 05:38:59,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:59,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882298976] [2021-10-20 05:38:59,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882298976] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:59,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:59,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:38:59,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825555006] [2021-10-20 05:38:59,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:38:59,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:59,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:38:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:38:59,956 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-10-20 05:38:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:59,999 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-10-20 05:39:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:39:00,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) Word has length 16 [2021-10-20 05:39:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:39:00,001 INFO L225 Difference]: With dead ends: 27 [2021-10-20 05:39:00,001 INFO L226 Difference]: Without dead ends: 20 [2021-10-20 05:39:00,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:39:00,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-20 05:39:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-20 05:39:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2021-10-20 05:39:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-10-20 05:39:00,006 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 16 [2021-10-20 05:39:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:39:00,006 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-10-20 05:39:00,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-10-20 05:39:00,007 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-10-20 05:39:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-20 05:39:00,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:39:00,008 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:39:00,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 05:39:00,008 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:39:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:39:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1197504362, now seen corresponding path program 1 times [2021-10-20 05:39:00,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:39:00,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195661954] [2021-10-20 05:39:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:39:00,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:39:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:39:00,068 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 05:39:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:39:00,143 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-20 05:39:00,144 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 05:39:00,145 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:39:00,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-20 05:39:00,155 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:39:00,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:39:00 BoogieIcfgContainer [2021-10-20 05:39:00,195 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:39:00,196 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:39:00,196 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:39:00,196 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:39:00,197 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:38:58" (3/4) ... [2021-10-20 05:39:00,199 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-20 05:39:00,248 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:39:00,248 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:39:00,250 INFO L168 Benchmark]: Toolchain (without parser) took 2436.86 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 78.0 MB in the beginning and 96.7 MB in the end (delta: -18.7 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:39:00,250 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 111.1 MB. Free memory is still 63.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:39:00,251 INFO L168 Benchmark]: CACSL2BoogieTranslator took 447.94 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 77.7 MB in the beginning and 109.6 MB in the end (delta: -31.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 05:39:00,251 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.60 ms. Allocated memory is still 142.6 MB. Free memory was 109.6 MB in the beginning and 107.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:39:00,252 INFO L168 Benchmark]: Boogie Preprocessor took 56.16 ms. Allocated memory is still 142.6 MB. Free memory was 107.7 MB in the beginning and 106.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:39:00,252 INFO L168 Benchmark]: RCFGBuilder took 570.57 ms. Allocated memory is still 142.6 MB. Free memory was 106.3 MB in the beginning and 88.8 MB in the end (delta: 17.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-20 05:39:00,253 INFO L168 Benchmark]: TraceAbstraction took 1255.80 ms. Allocated memory is still 142.6 MB. Free memory was 88.8 MB in the beginning and 99.8 MB in the end (delta: -11.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:39:00,253 INFO L168 Benchmark]: Witness Printer took 52.31 ms. Allocated memory is still 142.6 MB. Free memory was 99.8 MB in the beginning and 96.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:39:00,256 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 111.1 MB. Free memory is still 63.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 447.94 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 77.7 MB in the beginning and 109.6 MB in the end (delta: -31.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.60 ms. Allocated memory is still 142.6 MB. Free memory was 109.6 MB in the beginning and 107.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.16 ms. Allocated memory is still 142.6 MB. Free memory was 107.7 MB in the beginning and 106.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 570.57 ms. Allocated memory is still 142.6 MB. Free memory was 106.3 MB in the beginning and 88.8 MB in the end (delta: 17.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1255.80 ms. Allocated memory is still 142.6 MB. Free memory was 88.8 MB in the beginning and 99.8 MB in the end (delta: -11.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 52.31 ms. Allocated memory is still 142.6 MB. Free memory was 99.8 MB in the beginning and 96.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 584]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List l1; [L537] List l2; [L538] List b; [L539] List u; [L540] List p = a; [L541] COND TRUE __VERIFIER_nondet_int() [L542] COND TRUE \read(flag) [L543] p->h = 1 [L544] flag = 0 [L549] t = (List) malloc(sizeof(struct node)) [L550] COND FALSE !(t == 0) [L551] p->n = t [L552] EXPR p->n [L552] p = p->n [L541] COND FALSE !(__VERIFIER_nondet_int()) [L554] p->h = 3 [L555] EXPR a->h [L555] COND FALSE !(a->h == 3) [L556] flag = 1 [L557] l1 = 0 [L558] l2 = 0 [L559] p = a [L560] EXPR p->h [L560] COND TRUE p->h != 3 [L561] t = p [L562] EXPR p->n [L562] p = p->n [L563] COND TRUE \read(flag) [L564] t->n = l1 [L565] l1 = t [L566] flag = 0 [L560] EXPR p->h [L560] COND FALSE !(p->h != 3) [L573] p = l1 [L574] COND TRUE p != 0 [L575] EXPR p->h [L575] COND TRUE p->h != 2 [L584] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1131.7ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 12.9ms, AutomataDifference: 252.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 77 SDtfs, 10 SDslu, 61 SDs, 0 SdLazy, 65 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 95.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=3, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 54.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 21.2ms SsaConstructionTime, 185.3ms SatisfiabilityAnalysisTime, 325.0ms InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 49 ConstructedInterpolants, 0 QuantifiedInterpolants, 123 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 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! [2021-10-20 05:39:00,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ad8bb16-1a0d-482f-8572-63666fe0ef17/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...