./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-circular-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/forester-heap/sll-circular-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ca87716ddde5218a0bb0d9c4d67f4e1c636cb2c ......................................................................................................................................................................................................................................................................................................................................................................................................... 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-wip.dd.seqcomp-5fbdf5b [2021-08-29 09:13:18,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 09:13:18,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 09:13:18,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 09:13:18,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 09:13:18,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 09:13:18,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 09:13:18,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 09:13:18,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 09:13:18,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 09:13:18,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 09:13:18,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 09:13:18,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 09:13:18,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 09:13:18,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 09:13:18,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 09:13:18,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 09:13:18,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 09:13:18,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 09:13:18,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 09:13:18,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 09:13:18,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 09:13:18,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 09:13:18,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 09:13:18,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 09:13:18,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 09:13:18,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 09:13:18,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 09:13:18,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 09:13:18,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 09:13:18,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 09:13:18,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 09:13:18,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 09:13:18,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 09:13:18,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 09:13:18,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 09:13:18,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 09:13:18,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 09:13:18,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 09:13:18,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 09:13:18,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 09:13:18,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 09:13:18,384 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 09:13:18,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 09:13:18,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 09:13:18,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 09:13:18,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 09:13:18,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 09:13:18,388 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 09:13:18,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 09:13:18,388 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 09:13:18,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 09:13:18,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 09:13:18,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 09:13:18,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 09:13:18,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 09:13:18,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 09:13:18,390 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 09:13:18,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 09:13:18,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 09:13:18,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 09:13:18,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 09:13:18,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 09:13:18,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 09:13:18,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:13:18,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 09:13:18,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 09:13:18,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 09:13:18,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 09:13:18,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 09:13:18,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 09:13:18,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 09:13:18,393 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ca87716ddde5218a0bb0d9c4d67f4e1c636cb2c [2021-08-29 09:13:18,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 09:13:18,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 09:13:18,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 09:13:18,738 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 09:13:18,739 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 09:13:18,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-circular-2.i [2021-08-29 09:13:19,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77bfae04e/759086a709fc417781e7d977ea797c0d/FLAG2ec3345d8 [2021-08-29 09:13:19,808 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 09:13:19,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-circular-2.i [2021-08-29 09:13:19,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77bfae04e/759086a709fc417781e7d977ea797c0d/FLAG2ec3345d8 [2021-08-29 09:13:19,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77bfae04e/759086a709fc417781e7d977ea797c0d [2021-08-29 09:13:19,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 09:13:19,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 09:13:19,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 09:13:19,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 09:13:19,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 09:13:19,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:13:19" (1/1) ... [2021-08-29 09:13:19,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@648dfe9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:19, skipping insertion in model container [2021-08-29 09:13:19,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:13:19" (1/1) ... [2021-08-29 09:13:19,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 09:13:19,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 09:13:20,083 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-circular-2.i[22324,22337] [2021-08-29 09:13:20,091 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-circular-2.i[22430,22443] [2021-08-29 09:13:20,095 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-circular-2.i[22554,22567] [2021-08-29 09:13:20,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:13:20,110 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 09:13:20,170 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-circular-2.i[22324,22337] [2021-08-29 09:13:20,172 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-circular-2.i[22430,22443] [2021-08-29 09:13:20,174 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-circular-2.i[22554,22567] [2021-08-29 09:13:20,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:13:20,205 INFO L208 MainTranslator]: Completed translation [2021-08-29 09:13:20,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:20 WrapperNode [2021-08-29 09:13:20,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 09:13:20,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 09:13:20,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 09:13:20,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 09:13:20,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:20" (1/1) ... [2021-08-29 09:13:20,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:20" (1/1) ... [2021-08-29 09:13:20,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 09:13:20,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 09:13:20,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 09:13:20,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 09:13:20,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:20" (1/1) ... [2021-08-29 09:13:20,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:20" (1/1) ... [2021-08-29 09:13:20,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:20" (1/1) ... [2021-08-29 09:13:20,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:20" (1/1) ... [2021-08-29 09:13:20,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:20" (1/1) ... [2021-08-29 09:13:20,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:20" (1/1) ... [2021-08-29 09:13:20,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:20" (1/1) ... [2021-08-29 09:13:20,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 09:13:20,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 09:13:20,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 09:13:20,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 09:13:20,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:20" (1/1) ... [2021-08-29 09:13:20,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:13:20,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:13:20,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 09:13:20,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 09:13:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 09:13:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 09:13:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 09:13:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-29 09:13:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 09:13:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-29 09:13:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 09:13:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 09:13:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 09:13:20,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 09:13:20,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 09:13:20,581 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-29 09:13:20,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:13:20 BoogieIcfgContainer [2021-08-29 09:13:20,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 09:13:20,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 09:13:20,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 09:13:20,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 09:13:20,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:13:19" (1/3) ... [2021-08-29 09:13:20,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c183186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:13:20, skipping insertion in model container [2021-08-29 09:13:20,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:13:20" (2/3) ... [2021-08-29 09:13:20,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c183186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:13:20, skipping insertion in model container [2021-08-29 09:13:20,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:13:20" (3/3) ... [2021-08-29 09:13:20,592 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-circular-2.i [2021-08-29 09:13:20,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 09:13:20,597 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-29 09:13:20,644 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 09:13:20,652 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, mConcurrency=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 [2021-08-29 09:13:20,653 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-29 09:13:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 32 states have internal predecessors, (51), 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) [2021-08-29 09:13:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 09:13:20,676 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:13:20,676 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 09:13:20,677 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:13:20,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:13:20,690 INFO L82 PathProgramCache]: Analyzing trace with hash 890892102, now seen corresponding path program 1 times [2021-08-29 09:13:20,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:13:20,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619461677] [2021-08-29 09:13:20,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:13:20,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:13:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:13:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:13:20,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:13:20,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619461677] [2021-08-29 09:13:20,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619461677] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:13:20,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:13:20,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 09:13:20,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104463814] [2021-08-29 09:13:20,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 09:13:20,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:13:20,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 09:13:20,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 09:13:20,957 INFO L87 Difference]: Start difference. First operand has 33 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 32 states have internal predecessors, (51), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-29 09:13:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:13:21,049 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2021-08-29 09:13:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 09:13:21,052 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-08-29 09:13:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:13:21,058 INFO L225 Difference]: With dead ends: 64 [2021-08-29 09:13:21,059 INFO L226 Difference]: Without dead ends: 26 [2021-08-29 09:13:21,063 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 09:13:21,069 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.04ms IncrementalHoareTripleChecker+Time [2021-08-29 09:13:21,071 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.49ms Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 60.04ms Time] [2021-08-29 09:13:21,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-29 09:13:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-29 09:13:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 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) [2021-08-29 09:13:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-08-29 09:13:21,101 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2021-08-29 09:13:21,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:13:21,101 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-08-29 09:13:21,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-29 09:13:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-08-29 09:13:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-29 09:13:21,102 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:13:21,103 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:13:21,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 09:13:21,103 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:13:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:13:21,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1806883023, now seen corresponding path program 1 times [2021-08-29 09:13:21,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:13:21,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18419578] [2021-08-29 09:13:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:13:21,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:13:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:13:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:13:21,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:13:21,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18419578] [2021-08-29 09:13:21,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18419578] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:13:21,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:13:21,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 09:13:21,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265574926] [2021-08-29 09:13:21,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 09:13:21,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:13:21,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 09:13:21,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 09:13:21,261 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-08-29 09:13:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:13:21,332 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-08-29 09:13:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 09:13:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-08-29 09:13:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:13:21,333 INFO L225 Difference]: With dead ends: 42 [2021-08-29 09:13:21,333 INFO L226 Difference]: Without dead ends: 38 [2021-08-29 09:13:21,334 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.81ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 09:13:21,335 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.05ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.27ms IncrementalHoareTripleChecker+Time [2021-08-29 09:13:21,336 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 77 Unknown, 0 Unchecked, 1.05ms Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 61.27ms Time] [2021-08-29 09:13:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-29 09:13:21,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-08-29 09:13:21,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 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) [2021-08-29 09:13:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-08-29 09:13:21,341 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 7 [2021-08-29 09:13:21,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:13:21,341 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-08-29 09:13:21,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-08-29 09:13:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-08-29 09:13:21,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 09:13:21,342 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:13:21,343 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:13:21,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 09:13:21,343 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:13:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:13:21,344 INFO L82 PathProgramCache]: Analyzing trace with hash 706691337, now seen corresponding path program 1 times [2021-08-29 09:13:21,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:13:21,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062678414] [2021-08-29 09:13:21,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:13:21,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:13:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:13:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:13:21,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:13:21,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062678414] [2021-08-29 09:13:21,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062678414] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:13:21,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:13:21,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 09:13:21,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002848152] [2021-08-29 09:13:21,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 09:13:21,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:13:21,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 09:13:21,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 09:13:21,393 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-08-29 09:13:21,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:13:21,472 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2021-08-29 09:13:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 09:13:21,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 [2021-08-29 09:13:21,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:13:21,475 INFO L225 Difference]: With dead ends: 71 [2021-08-29 09:13:21,476 INFO L226 Difference]: Without dead ends: 49 [2021-08-29 09:13:21,479 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.94ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 09:13:21,481 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.69ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.79ms IncrementalHoareTripleChecker+Time [2021-08-29 09:13:21,483 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 57 Unknown, 0 Unchecked, 0.69ms Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 61.79ms Time] [2021-08-29 09:13:21,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-29 09:13:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-08-29 09:13:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.303030303030303) internal successors, (43), 34 states have internal predecessors, (43), 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) [2021-08-29 09:13:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-08-29 09:13:21,496 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 10 [2021-08-29 09:13:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:13:21,497 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-08-29 09:13:21,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-08-29 09:13:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-08-29 09:13:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 09:13:21,498 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:13:21,498 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:13:21,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 09:13:21,498 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:13:21,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:13:21,499 INFO L82 PathProgramCache]: Analyzing trace with hash -84804677, now seen corresponding path program 1 times [2021-08-29 09:13:21,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:13:21,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799925827] [2021-08-29 09:13:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:13:21,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:13:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 09:13:21,536 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 09:13:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 09:13:21,590 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 09:13:21,591 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 09:13:21,592 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-08-29 09:13:21,593 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2021-08-29 09:13:21,594 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2021-08-29 09:13:21,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 09:13:21,607 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 09:13:21,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 09:13:21 BoogieIcfgContainer [2021-08-29 09:13:21,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 09:13:21,643 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 09:13:21,644 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 09:13:21,644 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 09:13:21,644 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:13:20" (3/4) ... [2021-08-29 09:13:21,646 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 09:13:21,682 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 09:13:21,683 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 09:13:21,683 INFO L158 Benchmark]: Toolchain (without parser) took 1844.11ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 36.3MB in the beginning and 37.5MB in the end (delta: -1.2MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2021-08-29 09:13:21,684 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 58.7MB. Free memory was 41.1MB in the beginning and 41.0MB in the end (delta: 50.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:13:21,684 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.87ms. Allocated memory is still 58.7MB. Free memory was 36.0MB in the beginning and 36.4MB in the end (delta: -429.3kB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2021-08-29 09:13:21,685 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.79ms. Allocated memory is still 58.7MB. Free memory was 36.2MB in the beginning and 34.3MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:13:21,685 INFO L158 Benchmark]: Boogie Preprocessor took 33.38ms. Allocated memory is still 58.7MB. Free memory was 34.3MB in the beginning and 32.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 09:13:21,686 INFO L158 Benchmark]: RCFGBuilder took 306.52ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 32.7MB in the beginning and 49.8MB in the end (delta: -17.2MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2021-08-29 09:13:21,686 INFO L158 Benchmark]: TraceAbstraction took 1056.70ms. Allocated memory is still 71.3MB. Free memory was 49.2MB in the beginning and 39.6MB in the end (delta: 9.7MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. [2021-08-29 09:13:21,686 INFO L158 Benchmark]: Witness Printer took 39.21ms. Allocated memory is still 71.3MB. Free memory was 39.6MB in the beginning and 37.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 09:13:21,688 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 58.7MB. Free memory was 41.1MB in the beginning and 41.0MB in the end (delta: 50.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.87ms. Allocated memory is still 58.7MB. Free memory was 36.0MB in the beginning and 36.4MB in the end (delta: -429.3kB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.79ms. Allocated memory is still 58.7MB. Free memory was 36.2MB in the beginning and 34.3MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.38ms. Allocated memory is still 58.7MB. Free memory was 34.3MB in the beginning and 32.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 306.52ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 32.7MB in the beginning and 49.8MB in the end (delta: -17.2MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * TraceAbstraction took 1056.70ms. Allocated memory is still 71.3MB. Free memory was 49.2MB in the beginning and 39.6MB in the end (delta: 9.7MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. * Witness Printer took 39.21ms. Allocated memory is still 71.3MB. Free memory was 39.6MB in the beginning and 37.5MB 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, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1032]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L996] SLL* head = malloc(sizeof(SLL)); [L997] head->next = head [L998] head->data = 0 [L1000] SLL* x = head; [L1001] int state = 1; [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1025] x->data = state [L1027] EXPR head->next [L1027] x = head->next [L1028] COND FALSE !(!(((void*)0) != x)) [L1030] EXPR x->data [L1030] COND TRUE x->data != 0 [L1032] EXPR x->next [L1032] EXPR x->next->data [L1032] EXPR x->next->data != 0 && x->data > x->next->data [L1032] EXPR x->data [L1032] EXPR x->next [L1032] EXPR x->next->data [L1032] EXPR x->next->data != 0 && x->data > x->next->data [L1032] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1032] reach_error() - UnprovableResult [Line: 1023]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 962.61ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 15.56ms, AutomataDifference: 325.10ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 8.82ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 44 SdHoareTripleChecker+Valid, 183.10ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 148.28ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 49 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 169 IncrementalHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 169 mSolverCounterSat, 2.23ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.78ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 35.47ms AutomataMinimizationTime, 3 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 16.98ms SsaConstructionTime, 84.91ms SatisfiabilityAnalysisTime, 237.39ms InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 91 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-29 09:13:21,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...