./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/verifythis/tree_del_rec.c -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 3d5c80ebc24229a709692e92e1e7cb6c93b163ba ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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-20ed64e [2021-08-26 09:02:14,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 09:02:14,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 09:02:14,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 09:02:14,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 09:02:14,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 09:02:14,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 09:02:14,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 09:02:14,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 09:02:14,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 09:02:14,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 09:02:14,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 09:02:14,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 09:02:14,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 09:02:14,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 09:02:14,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 09:02:14,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 09:02:14,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 09:02:14,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 09:02:14,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 09:02:14,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 09:02:14,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 09:02:14,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 09:02:14,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 09:02:14,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 09:02:14,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 09:02:14,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 09:02:14,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 09:02:14,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 09:02:14,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 09:02:14,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 09:02:14,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 09:02:14,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 09:02:14,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 09:02:14,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 09:02:14,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 09:02:14,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 09:02:14,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 09:02:14,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 09:02:14,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 09:02:14,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 09:02:14,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 09:02:14,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 09:02:14,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 09:02:14,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 09:02:14,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 09:02:14,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 09:02:14,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 09:02:14,418 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 09:02:14,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 09:02:14,419 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 09:02:14,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 09:02:14,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 09:02:14,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 09:02:14,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 09:02:14,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 09:02:14,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 09:02:14,420 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 09:02:14,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 09:02:14,421 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 09:02:14,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 09:02:14,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 09:02:14,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 09:02:14,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 09:02:14,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 09:02:14,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 09:02:14,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 09:02:14,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 09:02:14,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 09:02:14,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 09:02:14,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 09:02:14,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 09:02:14,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2021-08-26 09:02:14,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 09:02:14,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 09:02:14,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 09:02:14,780 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 09:02:14,781 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 09:02:14,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-08-26 09:02:14,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe859e101/85bf16cf3ea1496ab6e167d5caee93b0/FLAG0a75ca63f [2021-08-26 09:02:15,242 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 09:02:15,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-08-26 09:02:15,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe859e101/85bf16cf3ea1496ab6e167d5caee93b0/FLAG0a75ca63f [2021-08-26 09:02:15,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe859e101/85bf16cf3ea1496ab6e167d5caee93b0 [2021-08-26 09:02:15,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 09:02:15,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 09:02:15,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 09:02:15,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 09:02:15,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 09:02:15,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:02:15" (1/1) ... [2021-08-26 09:02:15,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61af4d30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15, skipping insertion in model container [2021-08-26 09:02:15,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:02:15" (1/1) ... [2021-08-26 09:02:15,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 09:02:15,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 09:02:15,775 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/verifythis/tree_del_rec.c[585,598] [2021-08-26 09:02:15,786 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-26 09:02:15,787 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-26 09:02:15,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 09:02:15,812 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 09:02:15,842 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/verifythis/tree_del_rec.c[585,598] [2021-08-26 09:02:15,864 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-26 09:02:15,865 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-26 09:02:15,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 09:02:15,885 INFO L208 MainTranslator]: Completed translation [2021-08-26 09:02:15,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15 WrapperNode [2021-08-26 09:02:15,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 09:02:15,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 09:02:15,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 09:02:15,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 09:02:15,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15" (1/1) ... [2021-08-26 09:02:15,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15" (1/1) ... [2021-08-26 09:02:15,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 09:02:15,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 09:02:15,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 09:02:15,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 09:02:15,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15" (1/1) ... [2021-08-26 09:02:15,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15" (1/1) ... [2021-08-26 09:02:15,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15" (1/1) ... [2021-08-26 09:02:15,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15" (1/1) ... [2021-08-26 09:02:15,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15" (1/1) ... [2021-08-26 09:02:15,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15" (1/1) ... [2021-08-26 09:02:15,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15" (1/1) ... [2021-08-26 09:02:15,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 09:02:15,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 09:02:15,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 09:02:15,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 09:02:15,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15" (1/1) ... [2021-08-26 09:02:15,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 09:02:15,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:02:15,994 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) [2021-08-26 09:02:16,021 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 [2021-08-26 09:02:16,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 09:02:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 09:02:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-08-26 09:02:16,039 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-08-26 09:02:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 09:02:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-08-26 09:02:16,041 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-08-26 09:02:16,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 09:02:16,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 09:02:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-08-26 09:02:16,042 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-08-26 09:02:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 09:02:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 09:02:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-08-26 09:02:16,042 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-08-26 09:02:16,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 09:02:16,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 09:02:16,043 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-08-26 09:02:16,043 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-08-26 09:02:16,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 09:02:16,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 09:02:16,550 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-08-26 09:02:16,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:02:16 BoogieIcfgContainer [2021-08-26 09:02:16,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 09:02:16,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 09:02:16,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 09:02:16,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 09:02:16,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 09:02:15" (1/3) ... [2021-08-26 09:02:16,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554fa79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:02:16, skipping insertion in model container [2021-08-26 09:02:16,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:15" (2/3) ... [2021-08-26 09:02:16,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554fa79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:02:16, skipping insertion in model container [2021-08-26 09:02:16,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:02:16" (3/3) ... [2021-08-26 09:02:16,559 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-08-26 09:02:16,563 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 09:02:16,563 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-08-26 09:02:16,598 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 09:02:16,603 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 [2021-08-26 09:02:16,604 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-26 09:02:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 61 states have internal predecessors, (77), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-08-26 09:02:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 09:02:16,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:16,625 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:02:16,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-26 09:02:16,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:16,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1169561837, now seen corresponding path program 1 times [2021-08-26 09:02:16,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:16,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640231368] [2021-08-26 09:02:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:16,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:16,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:16,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-26 09:02:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:16,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-08-26 09:02:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:16,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-26 09:02:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 09:02:16,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:16,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640231368] [2021-08-26 09:02:16,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640231368] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:02:16,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:02:16,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 09:02:16,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692717691] [2021-08-26 09:02:16,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 09:02:16,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 09:02:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-26 09:02:16,995 INFO L87 Difference]: Start difference. First operand has 83 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 61 states have internal predecessors, (77), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-26 09:02:17,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:17,409 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2021-08-26 09:02:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 09:02:17,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-08-26 09:02:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:17,419 INFO L225 Difference]: With dead ends: 149 [2021-08-26 09:02:17,419 INFO L226 Difference]: Without dead ends: 84 [2021-08-26 09:02:17,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 09:02:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-26 09:02:17,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2021-08-26 09:02:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 57 states have internal predecessors, (64), 16 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (19), 16 states have call predecessors, (19), 16 states have call successors, (19) [2021-08-26 09:02:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2021-08-26 09:02:17,464 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 30 [2021-08-26 09:02:17,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:17,464 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2021-08-26 09:02:17,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-26 09:02:17,465 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2021-08-26 09:02:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-26 09:02:17,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:17,468 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:02:17,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 09:02:17,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-26 09:02:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:17,469 INFO L82 PathProgramCache]: Analyzing trace with hash 309270478, now seen corresponding path program 1 times [2021-08-26 09:02:17,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:17,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013294998] [2021-08-26 09:02:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:17,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:17,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:17,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-26 09:02:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:17,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-08-26 09:02:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:17,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:17,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-26 09:02:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:17,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-26 09:02:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-26 09:02:17,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:17,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013294998] [2021-08-26 09:02:17,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013294998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:02:17,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137411007] [2021-08-26 09:02:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:17,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:02:17,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:02:17,863 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:02:17,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 09:02:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 09:02:18,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:02:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-26 09:02:18,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137411007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:02:18,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:02:18,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-08-26 09:02:18,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851879573] [2021-08-26 09:02:18,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 09:02:18,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:18,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 09:02:18,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-26 09:02:18,355 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-26 09:02:18,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:18,797 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2021-08-26 09:02:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 09:02:18,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 42 [2021-08-26 09:02:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:18,800 INFO L225 Difference]: With dead ends: 143 [2021-08-26 09:02:18,800 INFO L226 Difference]: Without dead ends: 84 [2021-08-26 09:02:18,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-26 09:02:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-26 09:02:18,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2021-08-26 09:02:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 59 states have internal predecessors, (65), 16 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2021-08-26 09:02:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2021-08-26 09:02:18,813 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 42 [2021-08-26 09:02:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:18,813 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2021-08-26 09:02:18,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-26 09:02:18,814 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2021-08-26 09:02:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-26 09:02:18,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:18,816 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:02:18,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 09:02:19,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:02:19,029 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-26 09:02:19,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:19,030 INFO L82 PathProgramCache]: Analyzing trace with hash 962350225, now seen corresponding path program 1 times [2021-08-26 09:02:19,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:19,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609408202] [2021-08-26 09:02:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:19,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-26 09:02:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-26 09:02:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-26 09:02:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-26 09:02:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-26 09:02:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-08-26 09:02:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-26 09:02:19,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:19,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609408202] [2021-08-26 09:02:19,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609408202] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:02:19,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:02:19,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-26 09:02:19,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333577174] [2021-08-26 09:02:19,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 09:02:19,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:19,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 09:02:19,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-26 09:02:19,270 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-08-26 09:02:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:19,611 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2021-08-26 09:02:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 09:02:19,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2021-08-26 09:02:19,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:19,613 INFO L225 Difference]: With dead ends: 143 [2021-08-26 09:02:19,613 INFO L226 Difference]: Without dead ends: 86 [2021-08-26 09:02:19,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-26 09:02:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-26 09:02:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-08-26 09:02:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.2) internal successors, (66), 61 states have internal predecessors, (66), 16 states have call successors, (16), 5 states have call predecessors, (16), 8 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2021-08-26 09:02:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2021-08-26 09:02:19,626 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 52 [2021-08-26 09:02:19,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:19,627 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2021-08-26 09:02:19,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-08-26 09:02:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2021-08-26 09:02:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-26 09:02:19,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:19,629 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:02:19,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 09:02:19,630 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-26 09:02:19,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:19,630 INFO L82 PathProgramCache]: Analyzing trace with hash -431413566, now seen corresponding path program 1 times [2021-08-26 09:02:19,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:19,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086349890] [2021-08-26 09:02:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:19,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-26 09:02:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-26 09:02:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-26 09:02:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-26 09:02:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-08-26 09:02:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-26 09:02:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-08-26 09:02:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-08-26 09:02:19,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:19,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086349890] [2021-08-26 09:02:19,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086349890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:02:19,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072937647] [2021-08-26 09:02:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:19,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:02:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:02:19,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:02:19,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 09:02:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 09:02:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:02:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-08-26 09:02:20,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072937647] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:02:20,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 09:02:20,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 17 [2021-08-26 09:02:20,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800221845] [2021-08-26 09:02:20,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 09:02:20,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:20,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 09:02:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-08-26 09:02:20,297 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-08-26 09:02:20,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:20,404 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2021-08-26 09:02:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 09:02:20,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2021-08-26 09:02:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:20,406 INFO L225 Difference]: With dead ends: 135 [2021-08-26 09:02:20,406 INFO L226 Difference]: Without dead ends: 85 [2021-08-26 09:02:20,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-08-26 09:02:20,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-26 09:02:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-08-26 09:02:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 63 states have internal predecessors, (67), 16 states have call successors, (16), 5 states have call predecessors, (16), 9 states have return successors, (25), 16 states have call predecessors, (25), 16 states have call successors, (25) [2021-08-26 09:02:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2021-08-26 09:02:20,416 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 65 [2021-08-26 09:02:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:20,417 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2021-08-26 09:02:20,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-08-26 09:02:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2021-08-26 09:02:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-08-26 09:02:20,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:20,419 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:02:20,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 09:02:20,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-26 09:02:20,643 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-26 09:02:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:20,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1851220005, now seen corresponding path program 1 times [2021-08-26 09:02:20,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:20,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52464139] [2021-08-26 09:02:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:20,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 09:02:20,675 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 09:02:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 09:02:20,740 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 09:02:20,741 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 09:02:20,742 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:02:20,744 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:02:20,744 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:02:20,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:02:20,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-26 09:02:20,750 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 09:02:20,776 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,777 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,777 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,777 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,778 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,778 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,779 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,779 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,779 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,779 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,779 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,779 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 09:02:20 BoogieIcfgContainer [2021-08-26 09:02:20,827 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 09:02:20,828 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 09:02:20,828 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 09:02:20,828 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 09:02:20,829 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:02:16" (3/4) ... [2021-08-26 09:02:20,830 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 09:02:20,835 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,835 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,835 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,835 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,836 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,836 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,837 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,837 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,837 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,837 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,837 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,837 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:20,904 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 09:02:20,905 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 09:02:20,906 INFO L168 Benchmark]: Toolchain (without parser) took 5249.80 ms. Allocated memory was 60.8 MB in the beginning and 107.0 MB in the end (delta: 46.1 MB). Free memory was 38.9 MB in the beginning and 60.2 MB in the end (delta: -21.3 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:20,907 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 60.8 MB. Free memory was 41.6 MB in the beginning and 41.5 MB in the end (delta: 28.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 09:02:20,907 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.04 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 42.3 MB in the end (delta: -3.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:20,907 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.55 ms. Allocated memory is still 60.8 MB. Free memory was 42.3 MB in the beginning and 40.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:20,908 INFO L168 Benchmark]: Boogie Preprocessor took 30.58 ms. Allocated memory is still 60.8 MB. Free memory was 40.6 MB in the beginning and 38.6 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 09:02:20,908 INFO L168 Benchmark]: RCFGBuilder took 603.64 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 38.6 MB in the beginning and 50.6 MB in the end (delta: -12.0 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:20,909 INFO L168 Benchmark]: TraceAbstraction took 4273.48 ms. Allocated memory was 73.4 MB in the beginning and 107.0 MB in the end (delta: 33.6 MB). Free memory was 50.3 MB in the beginning and 66.5 MB in the end (delta: -16.2 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:20,909 INFO L168 Benchmark]: Witness Printer took 76.80 ms. Allocated memory is still 107.0 MB. Free memory was 66.5 MB in the beginning and 60.2 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:20,912 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 60.8 MB. Free memory was 41.6 MB in the beginning and 41.5 MB in the end (delta: 28.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 223.04 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 42.3 MB in the end (delta: -3.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.55 ms. Allocated memory is still 60.8 MB. Free memory was 42.3 MB in the beginning and 40.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.58 ms. Allocated memory is still 60.8 MB. Free memory was 40.6 MB in the beginning and 38.6 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 603.64 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 38.6 MB in the beginning and 50.6 MB in the end (delta: -12.0 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4273.48 ms. Allocated memory was 73.4 MB in the beginning and 107.0 MB in the end (delta: 33.6 MB). Free memory was 50.3 MB in the beginning and 66.5 MB in the end (delta: -16.2 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. * Witness Printer took 76.80 ms. Allocated memory is still 107.0 MB. Free memory was 66.5 MB in the beginning and 60.2 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled * 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: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L102] CALL nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [n={-1:0}, nondet_tree()={0:0}] [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [n={-1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={-1:0}, n={-1:0}] [L102] RET nondet_tree() [L78] CALL, EXPR min(t) VAL [n={-1:0}] [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left VAL [a=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->left) VAL [a=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] int b = min(n->left); [L42] EXPR n->right VAL [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L42] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L78] RET, EXPR min(t) [L78] int a = min(t); [L79] int b; [L81] CALL, EXPR size(t) VAL [t={-1:0}] [L73] COND FALSE !(!t) [L74] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L74] CALL, EXPR size(t->left) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L74] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L74] CALL, EXPR size(t->right) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L74] return size(t->left) + size(t->right) + 1; [L81] RET, EXPR size(t) [L81] int n = size(t); [L9] COND FALSE !(!cond) [L83] int *x = calloc(n, sizeof(int)); [L84] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-2:0}, t={-1:0}] [L62] COND FALSE !(!t) [L65] EXPR t->left VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}] [L65] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L65] i = tree_inorder(t->left, a, i) [L66] EXPR i++ [L66] EXPR t->data [L66] a[i++] = t->data [L67] EXPR t->right VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}] [L67] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-2:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L67] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L67] i = tree_inorder(t->right, a, i) [L68] return i; VAL [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L84] RET tree_inorder(t, x, n) [L85] x[0] [L16] COND TRUE !cond [L16] reach_error() - UnprovableResult [Line: 16]: 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: 16]: 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: 16]: 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 6 procedures, 83 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 4151.9ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 17.6ms, AutomataDifference: 1343.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 329 SDtfs, 240 SDslu, 1437 SDs, 0 SdLazy, 776 SolverSat, 116 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 727.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 699.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=4, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 63.6ms AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 63.8ms SsaConstructionTime, 207.6ms SatisfiabilityAnalysisTime, 1665.7ms InterpolantComputationTime, 373 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 290 ConstructedInterpolants, 0 QuantifiedInterpolants, 906 SizeOfPredicates, 10 NumberOfNonLiveVariables, 589 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 105/111 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! [2021-08-26 09:02:20,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...