./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5c80ebc24229a709692e92e1e7cb6c93b163ba ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 15:34:51,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:34:51,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:34:51,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:34:51,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:34:51,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:34:51,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:34:51,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:34:51,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:34:51,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:34:51,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:34:51,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:34:51,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:34:51,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:34:51,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:34:52,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:34:52,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:34:52,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:34:52,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:34:52,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:34:52,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:34:52,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:34:52,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:34:52,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:34:52,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:34:52,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:34:52,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:34:52,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:34:52,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:34:52,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:34:52,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:34:52,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:34:52,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:34:52,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:34:52,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:34:52,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:34:52,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:34:52,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:34:52,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:34:52,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:34:52,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:34:52,041 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:34:52,073 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:34:52,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:34:52,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:34:52,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:34:52,077 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:34:52,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:34:52,077 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:34:52,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:34:52,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:34:52,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:34:52,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:34:52,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:34:52,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:34:52,079 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:34:52,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:34:52,080 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:34:52,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:34:52,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:34:52,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:34:52,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:34:52,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:34:52,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:34:52,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:34:52,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:34:52,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:34:52,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:34:52,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:34:52,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:34:52,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:34:52,084 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:/tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2020-12-01 15:34:52,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:34:52,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:34:52,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:34:52,433 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:34:52,434 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:34:52,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2020-12-01 15:34:52,572 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/data/11252ba82/7ae52ffdd72743288de20b4a4b95c5bd/FLAGf610be664 [2020-12-01 15:34:53,234 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:34:53,235 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/sv-benchmarks/c/verifythis/tree_del_rec.c [2020-12-01 15:34:53,243 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/data/11252ba82/7ae52ffdd72743288de20b4a4b95c5bd/FLAGf610be664 [2020-12-01 15:34:53,579 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/data/11252ba82/7ae52ffdd72743288de20b4a4b95c5bd [2020-12-01 15:34:53,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:34:53,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:34:53,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:34:53,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:34:53,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:34:53,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:34:53" (1/1) ... [2020-12-01 15:34:53,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76270d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:53, skipping insertion in model container [2020-12-01 15:34:53,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:34:53" (1/1) ... [2020-12-01 15:34:53,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:34:53,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:34:53,899 WARN L1500 CHandler]: Possible shadowing of function min [2020-12-01 15:34:53,902 WARN L1500 CHandler]: Possible shadowing of function min [2020-12-01 15:34:53,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:34:53,963 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:34:54,006 WARN L1500 CHandler]: Possible shadowing of function min [2020-12-01 15:34:54,013 WARN L1500 CHandler]: Possible shadowing of function min [2020-12-01 15:34:54,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:34:54,064 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:34:54,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:54 WrapperNode [2020-12-01 15:34:54,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:34:54,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:34:54,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:34:54,067 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:34:54,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:54" (1/1) ... [2020-12-01 15:34:54,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:54" (1/1) ... [2020-12-01 15:34:54,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:34:54,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:34:54,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:34:54,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:34:54,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:54" (1/1) ... [2020-12-01 15:34:54,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:54" (1/1) ... [2020-12-01 15:34:54,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:54" (1/1) ... [2020-12-01 15:34:54,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:54" (1/1) ... [2020-12-01 15:34:54,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:54" (1/1) ... [2020-12-01 15:34:54,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:54" (1/1) ... [2020-12-01 15:34:54,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:54" (1/1) ... [2020-12-01 15:34:54,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:34:54,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:34:54,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:34:54,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:34:54,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:34:54,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-01 15:34:54,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:34:54,332 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-12-01 15:34:54,332 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-12-01 15:34:54,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 15:34:54,332 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-12-01 15:34:54,333 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-12-01 15:34:54,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 15:34:54,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-01 15:34:54,333 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-12-01 15:34:54,333 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-12-01 15:34:54,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:34:54,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-01 15:34:54,334 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-12-01 15:34:54,334 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-12-01 15:34:54,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:34:54,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:34:54,335 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-12-01 15:34:54,335 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-12-01 15:34:54,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 15:34:55,051 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:34:55,052 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-01 15:34:55,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:34:55 BoogieIcfgContainer [2020-12-01 15:34:55,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:34:55,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:34:55,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:34:55,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:34:55,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:34:53" (1/3) ... [2020-12-01 15:34:55,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56bddb92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:34:55, skipping insertion in model container [2020-12-01 15:34:55,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:34:54" (2/3) ... [2020-12-01 15:34:55,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56bddb92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:34:55, skipping insertion in model container [2020-12-01 15:34:55,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:34:55" (3/3) ... [2020-12-01 15:34:55,081 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2020-12-01 15:34:55,111 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:34:55,115 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-01 15:34:55,128 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-01 15:34:55,161 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:34:55,161 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:34:55,161 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:34:55,161 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:34:55,162 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:34:55,162 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:34:55,162 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:34:55,162 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:34:55,187 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-12-01 15:34:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-01 15:34:55,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:34:55,199 INFO L422 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] [2020-12-01 15:34:55,200 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:34:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:34:55,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1705108219, now seen corresponding path program 1 times [2020-12-01 15:34:55,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:34:55,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415795003] [2020-12-01 15:34:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:34:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:55,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:34:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:55,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 15:34:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:55,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-12-01 15:34:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:55,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-12-01 15:34:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:34:55,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415795003] [2020-12-01 15:34:55,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:34:55,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-01 15:34:55,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963191338] [2020-12-01 15:34:55,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:34:55,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:34:55,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:34:55,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:34:55,666 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 7 states. [2020-12-01 15:34:56,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:34:56,126 INFO L93 Difference]: Finished difference Result 153 states and 204 transitions. [2020-12-01 15:34:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:34:56,128 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-12-01 15:34:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:34:56,140 INFO L225 Difference]: With dead ends: 153 [2020-12-01 15:34:56,140 INFO L226 Difference]: Without dead ends: 84 [2020-12-01 15:34:56,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:34:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-01 15:34:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2020-12-01 15:34:56,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-01 15:34:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2020-12-01 15:34:56,198 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 30 [2020-12-01 15:34:56,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:34:56,199 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2020-12-01 15:34:56,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:34:56,199 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2020-12-01 15:34:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-01 15:34:56,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:34:56,203 INFO L422 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] [2020-12-01 15:34:56,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:34:56,204 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:34:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:34:56,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2043852858, now seen corresponding path program 1 times [2020-12-01 15:34:56,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:34:56,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217613206] [2020-12-01 15:34:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:34:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:56,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:34:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:56,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-01 15:34:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:56,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-12-01 15:34:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:56,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:34:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:56,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-01 15:34:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:56,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-12-01 15:34:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-01 15:34:56,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217613206] [2020-12-01 15:34:56,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110143035] [2020-12-01 15:34:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:34:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:56,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-01 15:34:56,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:34:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-01 15:34:56,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:34:56,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2020-12-01 15:34:56,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930134585] [2020-12-01 15:34:56,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 15:34:56,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:34:56,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 15:34:56,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:34:56,960 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 11 states. [2020-12-01 15:34:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:34:57,517 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2020-12-01 15:34:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:34:57,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-12-01 15:34:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:34:57,532 INFO L225 Difference]: With dead ends: 143 [2020-12-01 15:34:57,533 INFO L226 Difference]: Without dead ends: 84 [2020-12-01 15:34:57,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-12-01 15:34:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-01 15:34:57,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-12-01 15:34:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-01 15:34:57,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2020-12-01 15:34:57,562 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 42 [2020-12-01 15:34:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:34:57,564 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2020-12-01 15:34:57,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 15:34:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2020-12-01 15:34:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-01 15:34:57,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:34:57,576 INFO L422 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] [2020-12-01 15:34:57,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-01 15:34:57,784 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:34:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:34:57,784 INFO L82 PathProgramCache]: Analyzing trace with hash 130958985, now seen corresponding path program 1 times [2020-12-01 15:34:57,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:34:57,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940133901] [2020-12-01 15:34:57,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:34:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:57,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:34:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:57,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-01 15:34:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:57,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-01 15:34:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:57,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-01 15:34:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:57,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-01 15:34:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:34:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-01 15:34:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-12-01 15:34:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-01 15:34:58,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940133901] [2020-12-01 15:34:58,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:34:58,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-01 15:34:58,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822243781] [2020-12-01 15:34:58,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:34:58,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:34:58,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:34:58,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:34:58,033 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand 10 states. [2020-12-01 15:34:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:34:58,456 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2020-12-01 15:34:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:34:58,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-12-01 15:34:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:34:58,465 INFO L225 Difference]: With dead ends: 143 [2020-12-01 15:34:58,465 INFO L226 Difference]: Without dead ends: 86 [2020-12-01 15:34:58,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:34:58,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-01 15:34:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-12-01 15:34:58,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-01 15:34:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2020-12-01 15:34:58,492 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 52 [2020-12-01 15:34:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:34:58,495 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2020-12-01 15:34:58,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:34:58,496 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2020-12-01 15:34:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-01 15:34:58,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:34:58,498 INFO L422 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] [2020-12-01 15:34:58,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-01 15:34:58,500 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:34:58,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:34:58,501 INFO L82 PathProgramCache]: Analyzing trace with hash 748985290, now seen corresponding path program 1 times [2020-12-01 15:34:58,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:34:58,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425492406] [2020-12-01 15:34:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:34:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:34:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-01 15:34:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-01 15:34:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-01 15:34:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:34:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-01 15:34:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-01 15:34:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:34:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-01 15:34:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-12-01 15:34:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-01 15:34:58,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425492406] [2020-12-01 15:34:58,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549109583] [2020-12-01 15:34:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:34:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:34:58,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-01 15:34:58,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:34:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-01 15:34:59,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:34:59,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 17 [2020-12-01 15:34:59,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58849361] [2020-12-01 15:34:59,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:34:59,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:34:59,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:34:59,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-12-01 15:34:59,190 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand 8 states. [2020-12-01 15:34:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:34:59,345 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2020-12-01 15:34:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:34:59,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-12-01 15:34:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:34:59,352 INFO L225 Difference]: With dead ends: 135 [2020-12-01 15:34:59,352 INFO L226 Difference]: Without dead ends: 85 [2020-12-01 15:34:59,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-12-01 15:34:59,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-01 15:34:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-01 15:34:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-01 15:34:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2020-12-01 15:34:59,376 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 65 [2020-12-01 15:34:59,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:34:59,378 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2020-12-01 15:34:59,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:34:59,379 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2020-12-01 15:34:59,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-01 15:34:59,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:34:59,380 INFO L422 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] [2020-12-01 15:34:59,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:34:59,607 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:34:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:34:59,607 INFO L82 PathProgramCache]: Analyzing trace with hash -912424147, now seen corresponding path program 1 times [2020-12-01 15:34:59,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:34:59,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181468697] [2020-12-01 15:34:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:34:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:34:59,659 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:34:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:34:59,744 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:34:59,802 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:34:59,803 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:34:59,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-01 15:34:59,848 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,858 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,858 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,859 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,860 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,860 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,861 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,861 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,861 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,861 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,862 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,862 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:34:59 BoogieIcfgContainer [2020-12-01 15:34:59,959 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:34:59,960 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:34:59,960 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:34:59,960 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:34:59,960 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:34:55" (3/4) ... [2020-12-01 15:34:59,962 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:34:59,967 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,967 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,967 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,967 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,969 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,969 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,969 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,969 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,970 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,970 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,970 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:34:59,970 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-01 15:35:00,062 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_94138c4c-b3c4-4b2b-a9a1-1043ec6bf303/bin/uautomizer/witness.graphml [2020-12-01 15:35:00,062 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:35:00,064 INFO L168 Benchmark]: Toolchain (without parser) took 6471.39 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 60.9 MB in the beginning and 35.4 MB in the end (delta: 25.5 MB). Peak memory consumption was 55.0 MB. Max. memory is 16.1 GB. [2020-12-01 15:35:00,065 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 92.3 MB. Free memory was 49.2 MB in the beginning and 49.1 MB in the end (delta: 38.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:35:00,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 467.95 ms. Allocated memory is still 92.3 MB. Free memory was 60.7 MB in the beginning and 67.9 MB in the end (delta: -7.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:35:00,067 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.35 ms. Allocated memory is still 92.3 MB. Free memory was 67.9 MB in the beginning and 66.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:35:00,067 INFO L168 Benchmark]: Boogie Preprocessor took 92.96 ms. Allocated memory is still 92.3 MB. Free memory was 66.3 MB in the beginning and 64.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:35:00,068 INFO L168 Benchmark]: RCFGBuilder took 805.62 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 64.2 MB in the beginning and 99.2 MB in the end (delta: -35.0 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. [2020-12-01 15:35:00,069 INFO L168 Benchmark]: TraceAbstraction took 4902.68 ms. Allocated memory is still 121.6 MB. Free memory was 98.6 MB in the beginning and 41.7 MB in the end (delta: 56.9 MB). Peak memory consumption was 57.7 MB. Max. memory is 16.1 GB. [2020-12-01 15:35:00,070 INFO L168 Benchmark]: Witness Printer took 102.74 ms. Allocated memory is still 121.6 MB. Free memory was 41.7 MB in the beginning and 35.4 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-01 15:35:00,074 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 92.3 MB. Free memory was 49.2 MB in the beginning and 49.1 MB in the end (delta: 38.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 467.95 ms. Allocated memory is still 92.3 MB. Free memory was 60.7 MB in the beginning and 67.9 MB in the end (delta: -7.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 86.35 ms. Allocated memory is still 92.3 MB. Free memory was 67.9 MB in the beginning and 66.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 92.96 ms. Allocated memory is still 92.3 MB. Free memory was 66.3 MB in the beginning and 64.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 805.62 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 64.2 MB in the beginning and 99.2 MB in the end (delta: -35.0 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4902.68 ms. Allocated memory is still 121.6 MB. Free memory was 98.6 MB in the beginning and 41.7 MB in the end (delta: 56.9 MB). Peak memory consumption was 57.7 MB. Max. memory is 16.1 GB. * Witness Printer took 102.74 ms. Allocated memory is still 121.6 MB. Free memory was 41.7 MB in the beginning and 35.4 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: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L102] CALL nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, 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 [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L102] RET nondet_tree() [L78] CALL, EXPR min(t) VAL [n={-1:0}] [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left VAL [a=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->left) VAL [a=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] int b = min(n->left); [L42] EXPR n->right VAL [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L42] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L78] RET, EXPR min(t) [L78] int a = min(t); [L79] int b; [L81] CALL, EXPR size(t) VAL [t={-1:0}] [L73] COND FALSE !(!t) [L74] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L74] CALL, EXPR size(t->left) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L74] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L74] CALL, EXPR size(t->right) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L74] return size(t->left) + size(t->right) + 1; [L81] RET, EXPR size(t) [L81] int n = size(t); [L9] COND FALSE !(!cond) [L83] int *x = calloc(n, sizeof(int)); [L84] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-2:0}, t={-1:0}] [L62] COND FALSE !(!t) [L65] EXPR t->left VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}] [L65] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L65] i = tree_inorder(t->left, a, i) [L66] EXPR i++ [L66] EXPR t->data [L66] a[i++] = t->data [L67] EXPR t->right VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}] [L67] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-2:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L67] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L67] i = tree_inorder(t->right, a, i) [L68] return i; VAL [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L84] RET tree_inorder(t, x, n) [L85] x[0] [L16] COND TRUE !cond [L14] __assert_fail("0", "tree_del_rec.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 87 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.6s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 329 SDtfs, 244 SDslu, 1442 SDs, 0 SdLazy, 779 SolverSat, 118 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 373 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 290 ConstructedInterpolants, 0 QuantifiedInterpolants, 46902 SizeOfPredicates, 13 NumberOfNonLiveVariables, 593 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 105/111 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...