./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.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_incorrect.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 f1439388ab0e0331a25110b61c93eea2b0d4bab5 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 09:02:18,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 09:02:18,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 09:02:18,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 09:02:18,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 09:02:18,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 09:02:18,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 09:02:18,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 09:02:18,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 09:02:18,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 09:02:18,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 09:02:18,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 09:02:18,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 09:02:18,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 09:02:18,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 09:02:18,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 09:02:18,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 09:02:18,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 09:02:18,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 09:02:18,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 09:02:18,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 09:02:18,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 09:02:18,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 09:02:18,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 09:02:18,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 09:02:18,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 09:02:18,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 09:02:18,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 09:02:18,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 09:02:18,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 09:02:18,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 09:02:18,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 09:02:18,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 09:02:18,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 09:02:18,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 09:02:18,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 09:02:18,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 09:02:18,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 09:02:18,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 09:02:18,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 09:02:18,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 09:02:18,907 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 09:02:18,943 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 09:02:18,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 09:02:18,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 09:02:18,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 09:02:18,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 09:02:18,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 09:02:18,947 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 09:02:18,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 09:02:18,948 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 09:02:18,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 09:02:18,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 09:02:18,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 09:02:18,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 09:02:18,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 09:02:18,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 09:02:18,950 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 09:02:18,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 09:02:18,950 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 09:02:18,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 09:02:18,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 09:02:18,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 09:02:18,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 09:02:18,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 09:02:18,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 09:02:18,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 09:02:18,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 09:02:18,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 09:02:18,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 09:02:18,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 09:02:18,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 09:02:18,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1439388ab0e0331a25110b61c93eea2b0d4bab5 [2021-08-26 09:02:19,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 09:02:19,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 09:02:19,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 09:02:19,323 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 09:02:19,324 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 09:02:19,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2021-08-26 09:02:19,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b05bfda0f/da21bb167d8c4da9807c40a6f6fa8c50/FLAGc9ad91d7c [2021-08-26 09:02:19,821 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 09:02:19,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2021-08-26 09:02:19,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b05bfda0f/da21bb167d8c4da9807c40a6f6fa8c50/FLAGc9ad91d7c [2021-08-26 09:02:19,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b05bfda0f/da21bb167d8c4da9807c40a6f6fa8c50 [2021-08-26 09:02:19,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 09:02:19,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 09:02:19,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 09:02:19,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 09:02:19,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 09:02:19,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:02:19" (1/1) ... [2021-08-26 09:02:19,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635282b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:19, skipping insertion in model container [2021-08-26 09:02:19,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:02:19" (1/1) ... [2021-08-26 09:02:19,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 09:02:19,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 09:02:20,038 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_incorrect.c[618,631] [2021-08-26 09:02:20,071 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-26 09:02:20,073 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-26 09:02:20,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 09:02:20,125 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 09:02:20,139 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_incorrect.c[618,631] [2021-08-26 09:02:20,147 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-26 09:02:20,148 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-26 09:02:20,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 09:02:20,212 INFO L208 MainTranslator]: Completed translation [2021-08-26 09:02:20,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:20 WrapperNode [2021-08-26 09:02:20,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 09:02:20,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 09:02:20,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 09:02:20,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 09:02:20,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:20" (1/1) ... [2021-08-26 09:02:20,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:20" (1/1) ... [2021-08-26 09:02:20,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 09:02:20,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 09:02:20,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 09:02:20,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 09:02:20,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:20" (1/1) ... [2021-08-26 09:02:20,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:20" (1/1) ... [2021-08-26 09:02:20,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:20" (1/1) ... [2021-08-26 09:02:20,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:20" (1/1) ... [2021-08-26 09:02:20,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:20" (1/1) ... [2021-08-26 09:02:20,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:20" (1/1) ... [2021-08-26 09:02:20,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:20" (1/1) ... [2021-08-26 09:02:20,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 09:02:20,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 09:02:20,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 09:02:20,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 09:02:20,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:20" (1/1) ... [2021-08-26 09:02:20,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 09:02:20,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:02:20,367 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 09:02:20,372 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 09:02:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 09:02:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 09:02:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-08-26 09:02:20,406 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-08-26 09:02:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 09:02:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-08-26 09:02:20,406 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-08-26 09:02:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 09:02:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 09:02:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-08-26 09:02:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-08-26 09:02:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 09:02:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 09:02:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-08-26 09:02:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-08-26 09:02:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 09:02:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 09:02:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-08-26 09:02:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-08-26 09:02:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 09:02:20,983 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 09:02:20,983 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-08-26 09:02:20,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:02:20 BoogieIcfgContainer [2021-08-26 09:02:20,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 09:02:20,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 09:02:20,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 09:02:20,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 09:02:20,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 09:02:19" (1/3) ... [2021-08-26 09:02:20,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7913133c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:02:20, skipping insertion in model container [2021-08-26 09:02:20,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:02:20" (2/3) ... [2021-08-26 09:02:20,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7913133c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:02:20, skipping insertion in model container [2021-08-26 09:02:20,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:02:20" (3/3) ... [2021-08-26 09:02:20,998 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2021-08-26 09:02:21,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 09:02:21,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-08-26 09:02:21,056 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 09:02:21,062 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 09:02:21,063 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-26 09:02:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 55 states have (on average 1.309090909090909) internal successors, (72), 59 states have internal predecessors, (72), 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 09:02:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 09:02:21,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:21,094 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 09:02:21,095 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 09:02:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1095170897, now seen corresponding path program 1 times [2021-08-26 09:02:21,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:21,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508378132] [2021-08-26 09:02:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:21,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:21,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:21,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-26 09:02:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:21,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-08-26 09:02:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:21,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-26 09:02:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:21,370 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 09:02:21,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:21,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508378132] [2021-08-26 09:02:21,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508378132] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:02:21,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:02:21,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 09:02:21,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565743367] [2021-08-26 09:02:21,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 09:02:21,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:21,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 09:02:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 09:02:21,391 INFO L87 Difference]: Start difference. First operand has 81 states, 55 states have (on average 1.309090909090909) internal successors, (72), 59 states have internal predecessors, (72), 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 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-26 09:02:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:21,633 INFO L93 Difference]: Finished difference Result 142 states and 184 transitions. [2021-08-26 09:02:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 09:02:21,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-08-26 09:02:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:21,643 INFO L225 Difference]: With dead ends: 142 [2021-08-26 09:02:21,643 INFO L226 Difference]: Without dead ends: 81 [2021-08-26 09:02:21,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 09:02:21,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-26 09:02:21,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-08-26 09:02:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.196078431372549) internal successors, (61), 54 states have internal predecessors, (61), 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 09:02:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2021-08-26 09:02:21,683 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 30 [2021-08-26 09:02:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:21,684 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2021-08-26 09:02:21,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-26 09:02:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2021-08-26 09:02:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 09:02:21,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:21,686 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 09:02:21,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 09:02:21,687 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 09:02:21,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:21,688 INFO L82 PathProgramCache]: Analyzing trace with hash -394106319, now seen corresponding path program 1 times [2021-08-26 09:02:21,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:21,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945770916] [2021-08-26 09:02:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:21,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:21,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:21,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-26 09:02:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:21,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-08-26 09:02:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:21,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-26 09:02:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:21,834 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 09:02:21,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:21,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945770916] [2021-08-26 09:02:21,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945770916] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:02:21,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:02:21,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 09:02:21,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466985487] [2021-08-26 09:02:21,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 09:02:21,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 09:02:21,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-26 09:02:21,838 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. 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 09:02:22,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:22,050 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2021-08-26 09:02:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 09:02:22,051 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 09:02:22,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:22,053 INFO L225 Difference]: With dead ends: 136 [2021-08-26 09:02:22,053 INFO L226 Difference]: Without dead ends: 83 [2021-08-26 09:02:22,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 09:02:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-26 09:02:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2021-08-26 09:02:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 56 states have internal predecessors, (62), 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 09:02:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-08-26 09:02:22,066 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 30 [2021-08-26 09:02:22,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:22,067 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-08-26 09:02:22,067 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 09:02:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-08-26 09:02:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-26 09:02:22,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:22,069 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 09:02:22,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 09:02:22,070 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 09:02:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:22,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1904559170, now seen corresponding path program 1 times [2021-08-26 09:02:22,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:22,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421943882] [2021-08-26 09:02:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:22,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:22,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:22,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-26 09:02:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:22,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-08-26 09:02:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:22,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:22,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-26 09:02:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:22,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-26 09:02:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:22,246 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 09:02:22,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:22,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421943882] [2021-08-26 09:02:22,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421943882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:02:22,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541691443] [2021-08-26 09:02:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:22,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:02:22,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:02:22,253 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 09:02:22,285 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 09:02:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:22,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 09:02:22,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:02:22,750 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 09:02:22,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541691443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:02:22,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:02:22,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2021-08-26 09:02:22,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640287019] [2021-08-26 09:02:22,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 09:02:22,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:22,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 09:02:22,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-26 09:02:22,754 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-08-26 09:02:23,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:23,149 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2021-08-26 09:02:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 09:02:23,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 42 [2021-08-26 09:02:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:23,162 INFO L225 Difference]: With dead ends: 142 [2021-08-26 09:02:23,163 INFO L226 Difference]: Without dead ends: 83 [2021-08-26 09:02:23,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-26 09:02:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-26 09:02:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-08-26 09:02:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 58 states have internal predecessors, (63), 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 09:02:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-08-26 09:02:23,184 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 42 [2021-08-26 09:02:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:23,185 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-08-26 09:02:23,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-08-26 09:02:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-08-26 09:02:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-26 09:02:23,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:23,193 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 09:02:23,229 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 09:02:23,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:02:23,410 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 09:02:23,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:23,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1838253317, now seen corresponding path program 1 times [2021-08-26 09:02:23,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:23,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148323859] [2021-08-26 09:02:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:23,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:23,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:23,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-26 09:02:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:23,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-26 09:02:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:23,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-26 09:02:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:23,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-26 09:02:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:23,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:23,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-26 09:02:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:23,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-08-26 09:02:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:23,656 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 09:02:23,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:23,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148323859] [2021-08-26 09:02:23,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148323859] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:02:23,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:02:23,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-26 09:02:23,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142806843] [2021-08-26 09:02:23,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 09:02:23,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:23,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 09:02:23,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-26 09:02:23,659 INFO L87 Difference]: Start difference. First operand 80 states and 100 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 09:02:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:23,998 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2021-08-26 09:02:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 09:02:23,999 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 09:02:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:24,000 INFO L225 Difference]: With dead ends: 142 [2021-08-26 09:02:24,001 INFO L226 Difference]: Without dead ends: 85 [2021-08-26 09:02:24,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-26 09:02:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-26 09:02:24,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-08-26 09:02:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 60 states have internal predecessors, (64), 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 09:02:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2021-08-26 09:02:24,011 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 52 [2021-08-26 09:02:24,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:24,012 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2021-08-26 09:02:24,012 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 09:02:24,012 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2021-08-26 09:02:24,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-26 09:02:24,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:24,013 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 09:02:24,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 09:02:24,014 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 09:02:24,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:24,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1543692906, now seen corresponding path program 1 times [2021-08-26 09:02:24,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:24,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885778766] [2021-08-26 09:02:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:24,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:24,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:24,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-26 09:02:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:24,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-26 09:02:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:24,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-26 09:02:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:24,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:24,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-26 09:02:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:24,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-08-26 09:02:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:24,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:02:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:24,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-26 09:02:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:24,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-08-26 09:02:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:24,352 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 09:02:24,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:02:24,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885778766] [2021-08-26 09:02:24,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885778766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:02:24,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456338527] [2021-08-26 09:02:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:24,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:02:24,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:02:24,357 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 09:02:24,380 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 09:02:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:02:24,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 09:02:24,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:02:24,782 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 09:02:24,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456338527] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:02:24,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 09:02:24,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 17 [2021-08-26 09:02:24,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071582995] [2021-08-26 09:02:24,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 09:02:24,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:02:24,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 09:02:24,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-08-26 09:02:24,785 INFO L87 Difference]: Start difference. First operand 82 states and 103 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 09:02:24,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:02:24,912 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2021-08-26 09:02:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 09:02:24,913 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 09:02:24,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:02:24,917 INFO L225 Difference]: With dead ends: 134 [2021-08-26 09:02:24,917 INFO L226 Difference]: Without dead ends: 84 [2021-08-26 09:02:24,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-08-26 09:02:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-26 09:02:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-08-26 09:02:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 62 states have internal predecessors, (65), 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 09:02:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2021-08-26 09:02:24,929 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 65 [2021-08-26 09:02:24,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:02:24,929 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2021-08-26 09:02:24,930 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 09:02:24,930 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2021-08-26 09:02:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-08-26 09:02:24,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:02:24,931 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 09:02:24,955 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 09:02:25,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:02:25,153 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-26 09:02:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:02:25,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1767582969, now seen corresponding path program 1 times [2021-08-26 09:02:25,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:02:25,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777907399] [2021-08-26 09:02:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:02:25,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:02:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 09:02:25,195 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 09:02:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 09:02:25,278 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 09:02:25,278 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 09:02:25,279 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:02:25,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:02:25,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:02:25,282 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:02:25,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-26 09:02:25,291 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 09:02:25,306 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,307 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,308 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,308 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,310 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,311 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,311 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,311 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,311 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,312 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,312 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,312 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 09:02:25 BoogieIcfgContainer [2021-08-26 09:02:25,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 09:02:25,350 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 09:02:25,350 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 09:02:25,351 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 09:02:25,351 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:02:20" (3/4) ... [2021-08-26 09:02:25,353 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 09:02:25,362 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,362 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,363 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,363 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,364 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,364 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,364 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,364 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,364 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,365 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,365 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,365 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-26 09:02:25,438 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 09:02:25,438 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 09:02:25,439 INFO L168 Benchmark]: Toolchain (without parser) took 5588.02 ms. Allocated memory was 58.7 MB in the beginning and 134.2 MB in the end (delta: 75.5 MB). Free memory was 36.5 MB in the beginning and 68.1 MB in the end (delta: -31.6 MB). Peak memory consumption was 43.7 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:25,440 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 39.4 MB in the end (delta: 25.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 09:02:25,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.91 ms. Allocated memory is still 58.7 MB. Free memory was 36.3 MB in the beginning and 39.9 MB in the end (delta: -3.6 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:25,441 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.23 ms. Allocated memory is still 58.7 MB. Free memory was 39.9 MB in the beginning and 38.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:25,441 INFO L168 Benchmark]: Boogie Preprocessor took 59.22 ms. Allocated memory is still 58.7 MB. Free memory was 38.0 MB in the beginning and 36.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 09:02:25,441 INFO L168 Benchmark]: RCFGBuilder took 646.45 ms. Allocated memory was 58.7 MB in the beginning and 75.5 MB in the end (delta: 16.8 MB). Free memory was 36.2 MB in the beginning and 49.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:25,442 INFO L168 Benchmark]: TraceAbstraction took 4358.20 ms. Allocated memory was 75.5 MB in the beginning and 134.2 MB in the end (delta: 58.7 MB). Free memory was 48.6 MB in the beginning and 74.4 MB in the end (delta: -25.8 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:25,442 INFO L168 Benchmark]: Witness Printer took 87.72 ms. Allocated memory is still 134.2 MB. Free memory was 74.4 MB in the beginning and 68.1 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-26 09:02:25,444 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 39.4 MB in the end (delta: 25.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 358.91 ms. Allocated memory is still 58.7 MB. Free memory was 36.3 MB in the beginning and 39.9 MB in the end (delta: -3.6 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.23 ms. Allocated memory is still 58.7 MB. Free memory was 39.9 MB in the beginning and 38.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.22 ms. Allocated memory is still 58.7 MB. Free memory was 38.0 MB in the beginning and 36.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 646.45 ms. Allocated memory was 58.7 MB in the beginning and 75.5 MB in the end (delta: 16.8 MB). Free memory was 36.2 MB in the beginning and 49.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4358.20 ms. Allocated memory was 75.5 MB in the beginning and 134.2 MB in the end (delta: 58.7 MB). Free memory was 48.6 MB in the beginning and 74.4 MB in the end (delta: -25.8 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. * Witness Printer took 87.72 ms. Allocated memory is still 134.2 MB. Free memory was 74.4 MB in the beginning and 68.1 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: [L98] 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}] [L98] RET nondet_tree() [L76] CALL, EXPR min(t) VAL [n={-1:0}] [L37] COND FALSE !(!n) [L40] EXPR n->left VAL [n={-1:0}, n={-1:0}, n->left={0:0}] [L40] 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}] [L40] RET, EXPR min(n->left) VAL [min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L40] int a = min(n->left); [L41] EXPR n->right VAL [a=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L41] 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}] [L41] RET, EXPR min(n->right) VAL [a=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; VAL [\result=2147483647, a=2147483647, b=2147483647, n={-1:0}, n={-1:0}] [L76] RET, EXPR min(t) [L76] int a = min(t); [L77] int b; [L79] CALL, EXPR size(t) VAL [t={-1:0}] [L71] COND FALSE !(!t) [L72] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L72] CALL, EXPR size(t->left) VAL [t={0:0}] [L71] COND TRUE !t [L71] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L72] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L72] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L72] CALL, EXPR size(t->right) VAL [t={0:0}] [L71] COND TRUE !t [L71] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L72] 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}] [L72] return size(t->left) + size(t->right) + 1; [L79] RET, EXPR size(t) [L79] int n = size(t); [L10] COND FALSE !(!cond) [L81] int *x = calloc(n, sizeof(int)); [L82] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-3:0}, t={-1:0}] [L60] COND FALSE !(!t) [L63] EXPR t->left VAL [\old(i)=1, a={-3:0}, a={-3:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}] [L63] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-3:0}, t={0:0}] [L60] COND TRUE !t [L61] return i; VAL [\old(i)=1, \result=1, a={-3:0}, a={-3:0}, i=1, t={0:0}, t={0:0}] [L63] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-3:0}, a={-3:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L63] i = tree_inorder(t->left, a, i) [L64] EXPR i++ [L64] EXPR t->data [L64] a[i++] = t->data [L65] EXPR t->right VAL [\old(i)=1, a={-3:0}, a={-3:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}] [L65] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-3:0}, t={0:0}] [L60] COND TRUE !t [L61] return i; VAL [\old(i)=2, \result=2, a={-3:0}, a={-3:0}, i=2, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-3:0}, a={-3:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L65] i = tree_inorder(t->right, a, i) [L66] return i; VAL [\old(i)=1, \result=2, a={-3:0}, a={-3:0}, i=2, t={-1:0}, t={-1:0}] [L82] RET tree_inorder(t, x, n) [L83] 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, 81 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 4231.8ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 29.4ms, AutomataDifference: 1374.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 398 SDtfs, 224 SDslu, 1432 SDs, 0 SdLazy, 809 SolverSat, 110 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 743.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 565.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=5, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 72.4ms AutomataMinimizationTime, 5 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 66.0ms SsaConstructionTime, 224.6ms SatisfiabilityAnalysisTime, 1621.8ms InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 319 ConstructedInterpolants, 0 QuantifiedInterpolants, 947 SizeOfPredicates, 10 NumberOfNonLiveVariables, 586 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 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 09:02:25,493 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...