./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/sll2c_prepend_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f682d6a9f9df80cf11b356f08ea6be5ab5adaf1b414fc8a476877af8610cc552 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 22:14:19,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 22:14:19,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 22:14:19,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 22:14:19,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 22:14:19,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 22:14:19,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 22:14:19,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 22:14:19,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 22:14:19,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 22:14:19,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 22:14:19,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 22:14:19,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 22:14:19,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 22:14:19,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 22:14:19,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 22:14:19,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 22:14:19,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 22:14:19,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 22:14:19,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 22:14:19,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 22:14:19,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 22:14:19,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 22:14:19,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 22:14:19,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 22:14:19,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 22:14:19,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 22:14:19,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 22:14:19,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 22:14:19,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 22:14:19,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 22:14:19,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 22:14:19,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 22:14:19,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 22:14:19,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 22:14:19,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 22:14:19,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 22:14:19,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 22:14:19,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 22:14:19,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 22:14:19,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 22:14:19,508 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 22:14:19,532 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 22:14:19,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 22:14:19,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 22:14:19,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 22:14:19,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 22:14:19,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 22:14:19,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 22:14:19,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 22:14:19,534 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 22:14:19,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 22:14:19,535 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 22:14:19,535 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 22:14:19,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 22:14:19,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 22:14:19,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 22:14:19,535 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 22:14:19,535 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 22:14:19,536 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 22:14:19,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 22:14:19,536 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 22:14:19,536 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 22:14:19,536 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 22:14:19,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 22:14:19,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 22:14:19,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 22:14:19,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 22:14:19,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 22:14:19,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 22:14:19,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 22:14:19,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 22:14:19,537 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 22:14:19,538 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 22:14:19,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 22:14:19,538 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 22:14:19,538 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f682d6a9f9df80cf11b356f08ea6be5ab5adaf1b414fc8a476877af8610cc552 [2023-02-18 22:14:19,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 22:14:19,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 22:14:19,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 22:14:19,714 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 22:14:19,714 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 22:14:19,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_prepend_equal.i [2023-02-18 22:14:20,670 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 22:14:20,816 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 22:14:20,816 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i [2023-02-18 22:14:20,824 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c4ef3c7f/ceb8769df0cc4c698bd871d783f4b8e5/FLAG483777169 [2023-02-18 22:14:20,835 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c4ef3c7f/ceb8769df0cc4c698bd871d783f4b8e5 [2023-02-18 22:14:20,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 22:14:20,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 22:14:20,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 22:14:20,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 22:14:20,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 22:14:20,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:14:20" (1/1) ... [2023-02-18 22:14:20,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1096968b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:20, skipping insertion in model container [2023-02-18 22:14:20,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:14:20" (1/1) ... [2023-02-18 22:14:20,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 22:14:20,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 22:14:21,123 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i[24458,24471] [2023-02-18 22:14:21,128 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 22:14:21,136 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 22:14:21,163 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i[24458,24471] [2023-02-18 22:14:21,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 22:14:21,180 INFO L208 MainTranslator]: Completed translation [2023-02-18 22:14:21,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21 WrapperNode [2023-02-18 22:14:21,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 22:14:21,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 22:14:21,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 22:14:21,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 22:14:21,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21" (1/1) ... [2023-02-18 22:14:21,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21" (1/1) ... [2023-02-18 22:14:21,208 INFO L138 Inliner]: procedures = 127, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 143 [2023-02-18 22:14:21,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 22:14:21,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 22:14:21,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 22:14:21,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 22:14:21,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21" (1/1) ... [2023-02-18 22:14:21,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21" (1/1) ... [2023-02-18 22:14:21,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21" (1/1) ... [2023-02-18 22:14:21,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21" (1/1) ... [2023-02-18 22:14:21,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21" (1/1) ... [2023-02-18 22:14:21,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21" (1/1) ... [2023-02-18 22:14:21,236 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21" (1/1) ... [2023-02-18 22:14:21,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21" (1/1) ... [2023-02-18 22:14:21,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 22:14:21,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 22:14:21,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 22:14:21,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 22:14:21,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21" (1/1) ... [2023-02-18 22:14:21,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 22:14:21,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:21,270 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) [2023-02-18 22:14:21,313 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 [2023-02-18 22:14:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 22:14:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 22:14:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-18 22:14:21,322 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-18 22:14:21,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 22:14:21,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 22:14:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 22:14:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 22:14:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 22:14:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 22:14:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 22:14:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 22:14:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 22:14:21,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 22:14:21,455 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 22:14:21,456 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 22:14:21,711 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 22:14:21,715 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 22:14:21,715 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 22:14:21,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:14:21 BoogieIcfgContainer [2023-02-18 22:14:21,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 22:14:21,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 22:14:21,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 22:14:21,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 22:14:21,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 10:14:20" (1/3) ... [2023-02-18 22:14:21,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a06634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:14:21, skipping insertion in model container [2023-02-18 22:14:21,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:21" (2/3) ... [2023-02-18 22:14:21,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a06634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:14:21, skipping insertion in model container [2023-02-18 22:14:21,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:14:21" (3/3) ... [2023-02-18 22:14:21,722 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_equal.i [2023-02-18 22:14:21,733 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 22:14:21,733 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2023-02-18 22:14:21,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 22:14:21,774 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6d02c2f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 22:14:21,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-02-18 22:14:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 114 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:21,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 22:14:21,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:21,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 22:14:21,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:21,786 INFO L85 PathProgramCache]: Analyzing trace with hash 895152213, now seen corresponding path program 1 times [2023-02-18 22:14:21,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:21,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482779813] [2023-02-18 22:14:21,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:21,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:14:21,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:21,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482779813] [2023-02-18 22:14:21,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482779813] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:21,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:21,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 22:14:21,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943794415] [2023-02-18 22:14:21,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:21,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 22:14:21,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:21,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 22:14:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:14:21,989 INFO L87 Difference]: Start difference. First operand has 119 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 114 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:14:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:22,099 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2023-02-18 22:14:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 22:14:22,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 22:14:22,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:22,107 INFO L225 Difference]: With dead ends: 117 [2023-02-18 22:14:22,107 INFO L226 Difference]: Without dead ends: 114 [2023-02-18 22:14:22,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:14:22,111 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:22,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 183 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:14:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-18 22:14:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-02-18 22:14:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 109 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2023-02-18 22:14:22,136 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 6 [2023-02-18 22:14:22,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:22,136 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2023-02-18 22:14:22,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:14:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2023-02-18 22:14:22,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 22:14:22,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:22,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 22:14:22,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 22:14:22,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:22,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:22,138 INFO L85 PathProgramCache]: Analyzing trace with hash 895152214, now seen corresponding path program 1 times [2023-02-18 22:14:22,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:22,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456841815] [2023-02-18 22:14:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:22,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:14:22,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:22,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456841815] [2023-02-18 22:14:22,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456841815] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:22,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:22,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 22:14:22,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823320931] [2023-02-18 22:14:22,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:22,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 22:14:22,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:22,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 22:14:22,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:14:22,195 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:14:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:22,262 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2023-02-18 22:14:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 22:14:22,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 22:14:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:22,265 INFO L225 Difference]: With dead ends: 112 [2023-02-18 22:14:22,265 INFO L226 Difference]: Without dead ends: 112 [2023-02-18 22:14:22,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:14:22,267 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:22,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 22:14:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-18 22:14:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-02-18 22:14:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 60 states have (on average 1.9) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2023-02-18 22:14:22,274 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 6 [2023-02-18 22:14:22,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:22,274 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2023-02-18 22:14:22,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:14:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2023-02-18 22:14:22,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 22:14:22,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:22,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:22,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 22:14:22,276 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:22,277 INFO L85 PathProgramCache]: Analyzing trace with hash 972366423, now seen corresponding path program 1 times [2023-02-18 22:14:22,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:22,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691402615] [2023-02-18 22:14:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:22,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:22,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:14:22,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:22,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691402615] [2023-02-18 22:14:22,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691402615] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:22,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:22,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 22:14:22,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592654792] [2023-02-18 22:14:22,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:22,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 22:14:22,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:22,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 22:14:22,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 22:14:22,369 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 22:14:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:22,449 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2023-02-18 22:14:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 22:14:22,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-18 22:14:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:22,450 INFO L225 Difference]: With dead ends: 119 [2023-02-18 22:14:22,451 INFO L226 Difference]: Without dead ends: 119 [2023-02-18 22:14:22,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 22:14:22,452 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 5 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:22,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 275 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:14:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-18 22:14:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2023-02-18 22:14:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 108 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2023-02-18 22:14:22,458 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 13 [2023-02-18 22:14:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:22,459 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2023-02-18 22:14:22,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 22:14:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2023-02-18 22:14:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 22:14:22,459 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:22,460 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:22,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 22:14:22,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:22,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:22,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1029573860, now seen corresponding path program 1 times [2023-02-18 22:14:22,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:22,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599120357] [2023-02-18 22:14:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:22,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:22,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:22,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 22:14:22,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:22,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599120357] [2023-02-18 22:14:22,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599120357] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:22,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:22,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 22:14:22,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336599289] [2023-02-18 22:14:22,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:22,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 22:14:22,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:22,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 22:14:22,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 22:14:22,616 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 22:14:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:22,779 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2023-02-18 22:14:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:14:22,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-02-18 22:14:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:22,782 INFO L225 Difference]: With dead ends: 113 [2023-02-18 22:14:22,782 INFO L226 Difference]: Without dead ends: 113 [2023-02-18 22:14:22,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 22:14:22,783 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 13 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:22,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 387 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:14:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-18 22:14:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2023-02-18 22:14:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 61 states have (on average 1.8688524590163935) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2023-02-18 22:14:22,788 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 22 [2023-02-18 22:14:22,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:22,788 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2023-02-18 22:14:22,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 22:14:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2023-02-18 22:14:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 22:14:22,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:22,789 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:22,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 22:14:22,789 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1029573859, now seen corresponding path program 1 times [2023-02-18 22:14:22,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:22,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505002287] [2023-02-18 22:14:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:22,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:22,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:22,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 22:14:22,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:22,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505002287] [2023-02-18 22:14:22,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505002287] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:22,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:22,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 22:14:22,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781142453] [2023-02-18 22:14:22,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:22,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 22:14:22,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:22,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 22:14:22,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 22:14:22,968 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 22:14:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:23,128 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2023-02-18 22:14:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:14:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-02-18 22:14:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:23,130 INFO L225 Difference]: With dead ends: 112 [2023-02-18 22:14:23,130 INFO L226 Difference]: Without dead ends: 112 [2023-02-18 22:14:23,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 22:14:23,131 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 11 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:23,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 411 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:14:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-18 22:14:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2023-02-18 22:14:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.8524590163934427) internal successors, (113), 106 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2023-02-18 22:14:23,135 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 22 [2023-02-18 22:14:23,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:23,136 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2023-02-18 22:14:23,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 22:14:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2023-02-18 22:14:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 22:14:23,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:23,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:23,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 22:14:23,137 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:23,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:23,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1673413691, now seen corresponding path program 1 times [2023-02-18 22:14:23,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:23,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543257078] [2023-02-18 22:14:23,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:23,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:23,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:23,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 22:14:23,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:23,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543257078] [2023-02-18 22:14:23,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543257078] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:23,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984733900] [2023-02-18 22:14:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:23,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:23,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:23,299 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) [2023-02-18 22:14:23,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 22:14:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:23,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 22:14:23,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:23,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:14:23,447 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_256 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_256))) is different from true [2023-02-18 22:14:23,453 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_256 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_256))) is different from true [2023-02-18 22:14:23,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:23,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-18 22:14:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-02-18 22:14:23,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 22:14:23,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984733900] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 22:14:23,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 22:14:23,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 18 [2023-02-18 22:14:23,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513106265] [2023-02-18 22:14:23,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:23,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 22:14:23,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:23,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 22:14:23,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=219, Unknown=2, NotChecked=62, Total=342 [2023-02-18 22:14:23,637 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 22:14:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:23,870 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2023-02-18 22:14:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:14:23,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-02-18 22:14:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:23,871 INFO L225 Difference]: With dead ends: 128 [2023-02-18 22:14:23,871 INFO L226 Difference]: Without dead ends: 128 [2023-02-18 22:14:23,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=271, Unknown=2, NotChecked=70, Total=420 [2023-02-18 22:14:23,872 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 97 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:23,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 483 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 475 Invalid, 0 Unknown, 266 Unchecked, 0.2s Time] [2023-02-18 22:14:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-18 22:14:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 110. [2023-02-18 22:14:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 61 states have (on average 1.8360655737704918) internal successors, (112), 105 states have internal predecessors, (112), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2023-02-18 22:14:23,876 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 25 [2023-02-18 22:14:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:23,876 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2023-02-18 22:14:23,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 22:14:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2023-02-18 22:14:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 22:14:23,877 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:23,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:23,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 22:14:24,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-18 22:14:24,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1673413690, now seen corresponding path program 1 times [2023-02-18 22:14:24,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:24,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198756658] [2023-02-18 22:14:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:24,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:24,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:24,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 22:14:24,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:24,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198756658] [2023-02-18 22:14:24,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198756658] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:24,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288543547] [2023-02-18 22:14:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:24,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:24,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:24,420 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) [2023-02-18 22:14:24,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 22:14:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:24,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 22:14:24,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:24,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:14:24,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:14:24,678 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_363 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_363))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-18 22:14:24,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:24,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-18 22:14:24,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:24,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-18 22:14:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-18 22:14:24,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:24,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288543547] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:24,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:14:24,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2023-02-18 22:14:24,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303261194] [2023-02-18 22:14:24,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:24,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 22:14:24,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:24,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 22:14:24,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=289, Unknown=1, NotChecked=34, Total=380 [2023-02-18 22:14:24,751 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 22:14:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:25,130 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2023-02-18 22:14:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 22:14:25,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2023-02-18 22:14:25,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:25,131 INFO L225 Difference]: With dead ends: 110 [2023-02-18 22:14:25,131 INFO L226 Difference]: Without dead ends: 110 [2023-02-18 22:14:25,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=350, Unknown=1, NotChecked=38, Total=462 [2023-02-18 22:14:25,132 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 101 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:25,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 622 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 871 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2023-02-18 22:14:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-18 22:14:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2023-02-18 22:14:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 61 states have (on average 1.819672131147541) internal successors, (111), 104 states have internal predecessors, (111), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2023-02-18 22:14:25,135 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 25 [2023-02-18 22:14:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:25,136 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2023-02-18 22:14:25,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 22:14:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2023-02-18 22:14:25,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 22:14:25,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:25,137 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:25,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 22:14:25,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-02-18 22:14:25,342 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:25,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:25,343 INFO L85 PathProgramCache]: Analyzing trace with hash 512234271, now seen corresponding path program 1 times [2023-02-18 22:14:25,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:25,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636147017] [2023-02-18 22:14:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:25,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:25,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:25,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:25,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 22:14:25,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:25,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636147017] [2023-02-18 22:14:25,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636147017] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:25,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111923788] [2023-02-18 22:14:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:25,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:25,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:25,606 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 22:14:25,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 22:14:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 22:14:25,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:25,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:14:25,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 22:14:25,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:25,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 39 [2023-02-18 22:14:25,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 22:14:25,781 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-02-18 22:14:25,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:25,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 31 [2023-02-18 22:14:25,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 22:14:25,809 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_524 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_524))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-18 22:14:25,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:25,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-02-18 22:14:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 18 not checked. [2023-02-18 22:14:25,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:25,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111923788] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:25,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:14:25,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2023-02-18 22:14:25,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410754547] [2023-02-18 22:14:25,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:25,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 22:14:25,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:25,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 22:14:25,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=171, Unknown=2, NotChecked=54, Total=272 [2023-02-18 22:14:25,870 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 22:14:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:26,270 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2023-02-18 22:14:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 22:14:26,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2023-02-18 22:14:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:26,271 INFO L225 Difference]: With dead ends: 118 [2023-02-18 22:14:26,271 INFO L226 Difference]: Without dead ends: 118 [2023-02-18 22:14:26,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=246, Unknown=2, NotChecked=66, Total=380 [2023-02-18 22:14:26,272 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 244 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:26,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 385 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 542 Invalid, 0 Unknown, 240 Unchecked, 0.4s Time] [2023-02-18 22:14:26,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-18 22:14:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2023-02-18 22:14:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 95 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2023-02-18 22:14:26,275 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 37 [2023-02-18 22:14:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:26,275 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2023-02-18 22:14:26,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 22:14:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2023-02-18 22:14:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 22:14:26,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:26,276 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:26,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 22:14:26,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:26,482 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:26,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:26,482 INFO L85 PathProgramCache]: Analyzing trace with hash 512234272, now seen corresponding path program 1 times [2023-02-18 22:14:26,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:26,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811823857] [2023-02-18 22:14:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:26,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:26,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:26,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:26,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 22:14:26,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:26,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811823857] [2023-02-18 22:14:26,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811823857] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:26,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506518283] [2023-02-18 22:14:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:26,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:26,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:26,887 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 22:14:26,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 22:14:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:27,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-18 22:14:27,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:27,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:14:27,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-18 22:14:27,055 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_683 Int)) (= |c_#length| (store |c_old(#length)| |c_node_create_~temp~0#1.base| v_ArrVal_683))) (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2023-02-18 22:14:27,058 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_683 Int)) (= |c_#length| (store |c_old(#length)| |c_node_create_#res#1.base| v_ArrVal_683))) (< |c_node_create_#res#1.base| |c_#StackHeapBarrier|)) is different from true [2023-02-18 22:14:27,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:27,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-18 22:14:27,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-18 22:14:27,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:27,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-18 22:14:27,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 22:14:27,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:27,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 35 [2023-02-18 22:14:27,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 22:14:27,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:27,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 42 [2023-02-18 22:14:27,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-02-18 22:14:27,297 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_688 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_688))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-18 22:14:27,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:27,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-02-18 22:14:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 18 not checked. [2023-02-18 22:14:27,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:27,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506518283] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:27,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:14:27,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2023-02-18 22:14:27,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369437303] [2023-02-18 22:14:27,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:27,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 22:14:27,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:27,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 22:14:27,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=631, Unknown=3, NotChecked=156, Total=870 [2023-02-18 22:14:27,369 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 28 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 22:14:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:28,058 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2023-02-18 22:14:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 22:14:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 37 [2023-02-18 22:14:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:28,059 INFO L225 Difference]: With dead ends: 119 [2023-02-18 22:14:28,059 INFO L226 Difference]: Without dead ends: 119 [2023-02-18 22:14:28,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=1438, Unknown=3, NotChecked=240, Total=1892 [2023-02-18 22:14:28,060 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 459 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:28,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 496 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 854 Invalid, 0 Unknown, 360 Unchecked, 0.5s Time] [2023-02-18 22:14:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-18 22:14:28,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2023-02-18 22:14:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 86 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2023-02-18 22:14:28,064 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 37 [2023-02-18 22:14:28,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:28,065 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2023-02-18 22:14:28,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 22:14:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2023-02-18 22:14:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 22:14:28,065 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:28,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:28,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 22:14:28,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:28,266 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash -47629334, now seen corresponding path program 1 times [2023-02-18 22:14:28,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:28,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102290278] [2023-02-18 22:14:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:28,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 22:14:28,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:28,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102290278] [2023-02-18 22:14:28,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102290278] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:28,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:28,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 22:14:28,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947931742] [2023-02-18 22:14:28,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:28,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 22:14:28,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:28,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 22:14:28,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 22:14:28,403 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 22:14:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:28,499 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2023-02-18 22:14:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:14:28,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-18 22:14:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:28,500 INFO L225 Difference]: With dead ends: 107 [2023-02-18 22:14:28,500 INFO L226 Difference]: Without dead ends: 107 [2023-02-18 22:14:28,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 22:14:28,500 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 68 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:28,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 266 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:14:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-18 22:14:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2023-02-18 22:14:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 84 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:28,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2023-02-18 22:14:28,502 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 40 [2023-02-18 22:14:28,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:28,503 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2023-02-18 22:14:28,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 22:14:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2023-02-18 22:14:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 22:14:28,503 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:28,503 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:28,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 22:14:28,503 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:28,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:28,504 INFO L85 PathProgramCache]: Analyzing trace with hash -47629333, now seen corresponding path program 1 times [2023-02-18 22:14:28,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:28,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633741709] [2023-02-18 22:14:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:28,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 22:14:28,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:28,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633741709] [2023-02-18 22:14:28,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633741709] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:28,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:28,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 22:14:28,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978212841] [2023-02-18 22:14:28,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:28,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 22:14:28,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:28,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 22:14:28,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 22:14:28,629 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 22:14:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:28,727 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2023-02-18 22:14:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:14:28,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-18 22:14:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:28,728 INFO L225 Difference]: With dead ends: 87 [2023-02-18 22:14:28,728 INFO L226 Difference]: Without dead ends: 87 [2023-02-18 22:14:28,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 22:14:28,729 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 69 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:28,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 277 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:14:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-02-18 22:14:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-02-18 22:14:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 61 states have (on average 1.459016393442623) internal successors, (89), 82 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2023-02-18 22:14:28,731 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 40 [2023-02-18 22:14:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:28,731 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2023-02-18 22:14:28,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 22:14:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2023-02-18 22:14:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 22:14:28,732 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:28,732 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:28,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 22:14:28,732 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:28,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1476263067, now seen corresponding path program 1 times [2023-02-18 22:14:28,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:28,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153936043] [2023-02-18 22:14:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:28,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 22:14:29,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:29,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153936043] [2023-02-18 22:14:29,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153936043] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:29,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645064109] [2023-02-18 22:14:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:29,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:29,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:29,041 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 22:14:29,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 22:14:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:29,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-18 22:14:29,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:29,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:14:29,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-02-18 22:14:29,315 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1057 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1057))))) is different from true [2023-02-18 22:14:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:29,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-18 22:14:29,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:29,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 44 [2023-02-18 22:14:29,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 60 [2023-02-18 22:14:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-02-18 22:14:29,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:29,391 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1062 (Array Int Int)) (|v_node_create_~temp~0#1.base_30| Int)) (or (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_30| 1) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_30| v_ArrVal_1062) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)) 1) (not (< |v_node_create_~temp~0#1.base_30| |c_#StackHeapBarrier|)))) is different from false [2023-02-18 22:14:29,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645064109] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:29,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:14:29,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2023-02-18 22:14:29,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846470522] [2023-02-18 22:14:29,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:29,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 22:14:29,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:29,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 22:14:29,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=623, Unknown=3, NotChecked=102, Total=812 [2023-02-18 22:14:29,396 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 28 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 22:14:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:30,064 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2023-02-18 22:14:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 22:14:30,065 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2023-02-18 22:14:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:30,066 INFO L225 Difference]: With dead ends: 150 [2023-02-18 22:14:30,066 INFO L226 Difference]: Without dead ends: 150 [2023-02-18 22:14:30,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=1190, Unknown=5, NotChecked=146, Total=1560 [2023-02-18 22:14:30,067 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 490 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:30,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 881 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1190 Invalid, 3 Unknown, 140 Unchecked, 0.5s Time] [2023-02-18 22:14:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-18 22:14:30,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 86. [2023-02-18 22:14:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.435483870967742) internal successors, (89), 81 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2023-02-18 22:14:30,069 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 41 [2023-02-18 22:14:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:30,069 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2023-02-18 22:14:30,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 22:14:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2023-02-18 22:14:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 22:14:30,070 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:30,070 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:30,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 22:14:30,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 22:14:30,276 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1476263066, now seen corresponding path program 1 times [2023-02-18 22:14:30,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:30,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387990984] [2023-02-18 22:14:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:30,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:30,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:30,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:30,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 22:14:30,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:30,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387990984] [2023-02-18 22:14:30,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387990984] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:30,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442548630] [2023-02-18 22:14:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:30,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:30,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:30,773 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 22:14:30,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 22:14:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:30,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 22:14:30,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:30,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:14:30,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:14:31,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-02-18 22:14:31,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-18 22:14:31,186 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_1223 (Array Int Int)) (v_ArrVal_1222 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1222)) (= (select |c_old(#valid)| |node_create_~temp~0#1.base|) 0) (<= |node_create_~temp~0#1.base| (+ |c_#StackHeapBarrier| (- 1))) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1223)))) is different from true [2023-02-18 22:14:31,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:31,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 22:14:31,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:31,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2023-02-18 22:14:31,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:31,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-02-18 22:14:31,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:31,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2023-02-18 22:14:31,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-18 22:14:31,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-18 22:14:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-02-18 22:14:31,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:31,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442548630] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:31,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:14:31,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2023-02-18 22:14:31,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880767638] [2023-02-18 22:14:31,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:31,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 22:14:31,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:31,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 22:14:31,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=893, Unknown=1, NotChecked=60, Total=1056 [2023-02-18 22:14:31,371 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 29 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 22:14:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:32,153 INFO L93 Difference]: Finished difference Result 139 states and 152 transitions. [2023-02-18 22:14:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 22:14:32,154 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2023-02-18 22:14:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:32,154 INFO L225 Difference]: With dead ends: 139 [2023-02-18 22:14:32,154 INFO L226 Difference]: Without dead ends: 139 [2023-02-18 22:14:32,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=1525, Unknown=1, NotChecked=80, Total=1806 [2023-02-18 22:14:32,155 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 200 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:32,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1144 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1413 Invalid, 0 Unknown, 101 Unchecked, 0.6s Time] [2023-02-18 22:14:32,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-18 22:14:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 94. [2023-02-18 22:14:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 89 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2023-02-18 22:14:32,157 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 41 [2023-02-18 22:14:32,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:32,158 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2023-02-18 22:14:32,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 22:14:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2023-02-18 22:14:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 22:14:32,158 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:32,158 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-02-18 22:14:32,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 22:14:32,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:32,359 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:32,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:32,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1928392465, now seen corresponding path program 1 times [2023-02-18 22:14:32,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:32,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517879140] [2023-02-18 22:14:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:32,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:32,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:32,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:32,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 22:14:32,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:32,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517879140] [2023-02-18 22:14:32,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517879140] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:32,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169064072] [2023-02-18 22:14:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:32,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:32,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:32,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 22:14:32,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 22:14:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:32,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-18 22:14:32,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:33,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-18 22:14:33,144 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1413 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1413))) (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2023-02-18 22:14:33,146 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1414 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1414))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-18 22:14:33,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:33,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-18 22:14:33,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-02-18 22:14:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-02-18 22:14:33,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:33,225 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_36| Int) (v_ArrVal_1418 (Array Int Int))) (let ((.cse0 (* (- 1) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_36| v_ArrVal_1418) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|)))) (or (not (< |v_node_create_~temp~0#1.base_36| |c_#StackHeapBarrier|)) (<= .cse0 (- 1)) (<= 0 (+ .cse0 (- 1)))))) is different from false [2023-02-18 22:14:33,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169064072] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:33,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:14:33,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2023-02-18 22:14:33,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870282144] [2023-02-18 22:14:33,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:33,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 22:14:33,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:33,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 22:14:33,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=961, Unknown=3, NotChecked=192, Total=1260 [2023-02-18 22:14:33,228 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 22:14:33,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:33,728 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2023-02-18 22:14:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 22:14:33,728 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2023-02-18 22:14:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:33,729 INFO L225 Difference]: With dead ends: 97 [2023-02-18 22:14:33,729 INFO L226 Difference]: Without dead ends: 97 [2023-02-18 22:14:33,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=1674, Unknown=5, NotChecked=258, Total=2162 [2023-02-18 22:14:33,730 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 338 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:33,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 744 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 807 Invalid, 0 Unknown, 182 Unchecked, 0.3s Time] [2023-02-18 22:14:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-18 22:14:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2023-02-18 22:14:33,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 86 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:14:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2023-02-18 22:14:33,732 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 44 [2023-02-18 22:14:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:33,732 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2023-02-18 22:14:33,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 22:14:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2023-02-18 22:14:33,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 22:14:33,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:33,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-02-18 22:14:33,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 22:14:33,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:33,939 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-18 22:14:33,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:33,939 INFO L85 PathProgramCache]: Analyzing trace with hash -710984888, now seen corresponding path program 1 times [2023-02-18 22:14:33,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:33,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001151387] [2023-02-18 22:14:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:33,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:34,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:34,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:34,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 22:14:34,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:34,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001151387] [2023-02-18 22:14:34,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001151387] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:34,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570071147] [2023-02-18 22:14:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:34,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:34,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:34,658 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 22:14:34,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 22:14:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:34,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-18 22:14:34,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:34,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:14:34,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:34,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-18 22:14:34,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 22:14:35,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:35,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 70 [2023-02-18 22:14:35,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 44 [2023-02-18 22:14:35,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:35,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 166 treesize of output 132 [2023-02-18 22:14:35,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 72 [2023-02-18 22:14:35,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2023-02-18 22:14:35,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 22:14:35,171 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:14:35,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-02-18 22:14:35,255 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)) (exists ((v_ArrVal_1582 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1582))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1581 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1581))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-18 22:14:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:35,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:35,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 172 treesize of output 180 [2023-02-18 22:14:35,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:35,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 147 [2023-02-18 22:14:35,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:35,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 154 [2023-02-18 22:14:35,304 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:14:36,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6209 treesize of output 5453 [2023-02-18 22:14:42,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:42,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 233 select indices, 233 select index equivalence classes, 0 disjoint index pairs (out of 27028 index pairs), introduced 353 new quantified variables, introduced 27028 case distinctions, treesize of input 8649 treesize of output 221663