./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.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_unequal.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 f2f6ef7968fa573a7da88ae0a516f1d800f437d82b0fa75227e8d7d318952eb1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 22:14:24,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 22:14:24,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 22:14:24,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 22:14:24,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 22:14:24,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 22:14:24,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 22:14:24,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 22:14:24,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 22:14:24,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 22:14:24,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 22:14:24,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 22:14:24,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 22:14:24,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 22:14:24,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 22:14:24,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 22:14:24,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 22:14:24,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 22:14:24,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 22:14:24,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 22:14:24,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 22:14:24,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 22:14:24,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 22:14:24,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 22:14:24,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 22:14:24,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 22:14:24,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 22:14:24,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 22:14:24,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 22:14:24,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 22:14:24,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 22:14:24,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 22:14:24,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 22:14:24,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 22:14:24,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 22:14:24,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 22:14:24,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 22:14:24,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 22:14:24,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 22:14:24,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 22:14:24,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 22:14:24,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 22:14:24,186 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 22:14:24,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 22:14:24,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 22:14:24,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 22:14:24,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 22:14:24,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 22:14:24,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 22:14:24,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 22:14:24,189 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 22:14:24,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 22:14:24,190 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 22:14:24,190 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 22:14:24,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 22:14:24,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 22:14:24,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 22:14:24,190 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 22:14:24,190 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 22:14:24,190 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 22:14:24,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 22:14:24,191 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 22:14:24,191 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 22:14:24,191 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 22:14:24,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 22:14:24,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 22:14:24,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 22:14:24,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 22:14:24,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 22:14:24,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 22:14:24,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 22:14:24,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 22:14:24,193 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 22:14:24,193 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 22:14:24,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 22:14:24,193 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 22:14:24,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2f6ef7968fa573a7da88ae0a516f1d800f437d82b0fa75227e8d7d318952eb1 [2023-02-18 22:14:24,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 22:14:24,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 22:14:24,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 22:14:24,420 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 22:14:24,420 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 22:14:24,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2023-02-18 22:14:25,293 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 22:14:25,490 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 22:14:25,490 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2023-02-18 22:14:25,497 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98810830b/5a8a2b15a0de4bd9b0fceda88e16f711/FLAG2b449078f [2023-02-18 22:14:25,507 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98810830b/5a8a2b15a0de4bd9b0fceda88e16f711 [2023-02-18 22:14:25,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 22:14:25,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 22:14:25,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 22:14:25,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 22:14:25,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 22:14:25,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4069a6bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25, skipping insertion in model container [2023-02-18 22:14:25,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 22:14:25,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 22:14:25,737 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_unequal.i[24547,24560] [2023-02-18 22:14:25,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 22:14:25,745 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 22:14:25,795 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_unequal.i[24547,24560] [2023-02-18 22:14:25,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 22:14:25,817 INFO L208 MainTranslator]: Completed translation [2023-02-18 22:14:25,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25 WrapperNode [2023-02-18 22:14:25,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 22:14:25,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 22:14:25,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 22:14:25,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 22:14:25,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,846 INFO L138 Inliner]: procedures = 127, calls = 45, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2023-02-18 22:14:25,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 22:14:25,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 22:14:25,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 22:14:25,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 22:14:25,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,864 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 22:14:25,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 22:14:25,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 22:14:25,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 22:14:25,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25" (1/1) ... [2023-02-18 22:14:25,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 22:14:25,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:25,901 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 22:14:25,908 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 22:14:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 22:14:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 22:14:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-18 22:14:25,929 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-18 22:14:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 22:14:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 22:14:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 22:14:25,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 22:14:25,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 22:14:25,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 22:14:25,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 22:14:25,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 22:14:25,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 22:14:25,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 22:14:26,073 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 22:14:26,082 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 22:14:26,400 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 22:14:26,410 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 22:14:26,411 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 22:14:26,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:14:26 BoogieIcfgContainer [2023-02-18 22:14:26,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 22:14:26,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 22:14:26,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 22:14:26,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 22:14:26,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 10:14:25" (1/3) ... [2023-02-18 22:14:26,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5777c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:14:26, skipping insertion in model container [2023-02-18 22:14:26,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:14:25" (2/3) ... [2023-02-18 22:14:26,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5777c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:14:26, skipping insertion in model container [2023-02-18 22:14:26,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:14:26" (3/3) ... [2023-02-18 22:14:26,420 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_unequal.i [2023-02-18 22:14:26,431 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 22:14:26,432 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2023-02-18 22:14:26,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 22:14:26,467 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;@45270f08, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 22:14:26,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-02-18 22:14:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 122 states have internal predecessors, (136), 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 22:14:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 22:14:26,474 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:26,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 22:14:26,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:26,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:26,478 INFO L85 PathProgramCache]: Analyzing trace with hash 895521621, now seen corresponding path program 1 times [2023-02-18 22:14:26,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:26,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427253203] [2023-02-18 22:14:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:26,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:26,655 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 22:14:26,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:26,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427253203] [2023-02-18 22:14:26,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427253203] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:26,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:26,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 22:14:26,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102900566] [2023-02-18 22:14:26,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:26,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 22:14:26,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:26,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 22:14:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:14:26,688 INFO L87 Difference]: Start difference. First operand has 127 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 122 states have internal predecessors, (136), 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 22:14:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:26,804 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2023-02-18 22:14:26,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 22:14:26,807 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 22:14:26,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:26,812 INFO L225 Difference]: With dead ends: 125 [2023-02-18 22:14:26,812 INFO L226 Difference]: Without dead ends: 122 [2023-02-18 22:14:26,813 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 22:14:26,816 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:26,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 197 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:14:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-18 22:14:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-02-18 22:14:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 64 states have (on average 1.953125) internal successors, (125), 117 states have internal predecessors, (125), 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 22:14:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2023-02-18 22:14:26,842 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 6 [2023-02-18 22:14:26,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:26,843 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2023-02-18 22:14:26,843 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 22:14:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2023-02-18 22:14:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 22:14:26,843 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:26,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 22:14:26,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 22:14:26,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:26,845 INFO L85 PathProgramCache]: Analyzing trace with hash 895521622, now seen corresponding path program 1 times [2023-02-18 22:14:26,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:26,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355903126] [2023-02-18 22:14:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:26,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:26,896 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 22:14:26,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:26,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355903126] [2023-02-18 22:14:26,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355903126] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:26,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:26,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 22:14:26,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913416429] [2023-02-18 22:14:26,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:26,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 22:14:26,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:26,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 22:14:26,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:14:26,899 INFO L87 Difference]: Start difference. First operand 122 states and 131 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 22:14:26,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:26,954 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2023-02-18 22:14:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 22:14:26,955 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 22:14:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:26,956 INFO L225 Difference]: With dead ends: 120 [2023-02-18 22:14:26,956 INFO L226 Difference]: Without dead ends: 120 [2023-02-18 22:14:26,956 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 22:14:26,957 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:26,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 199 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 22:14:26,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-18 22:14:26,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-02-18 22:14:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 64 states have (on average 1.921875) internal successors, (123), 115 states have internal predecessors, (123), 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 22:14:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2023-02-18 22:14:26,964 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 6 [2023-02-18 22:14:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:26,964 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2023-02-18 22:14:26,964 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 22:14:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2023-02-18 22:14:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 22:14:26,965 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:26,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:26,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 22:14:26,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:26,966 INFO L85 PathProgramCache]: Analyzing trace with hash 164994135, now seen corresponding path program 1 times [2023-02-18 22:14:26,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:26,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184940097] [2023-02-18 22:14:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:26,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:27,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:27,054 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 22:14:27,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:27,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184940097] [2023-02-18 22:14:27,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184940097] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:27,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:27,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 22:14:27,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116587358] [2023-02-18 22:14:27,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:27,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 22:14:27,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:27,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 22:14:27,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 22:14:27,058 INFO L87 Difference]: Start difference. First operand 120 states and 129 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 22:14:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:27,136 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2023-02-18 22:14:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 22:14:27,137 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 22:14:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:27,138 INFO L225 Difference]: With dead ends: 127 [2023-02-18 22:14:27,138 INFO L226 Difference]: Without dead ends: 127 [2023-02-18 22:14:27,138 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 22:14:27,139 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 5 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:27,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 296 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:14:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-18 22:14:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2023-02-18 22:14:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 65 states have (on average 1.9076923076923078) internal successors, (124), 116 states have internal predecessors, (124), 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 22:14:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2023-02-18 22:14:27,146 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 13 [2023-02-18 22:14:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:27,146 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2023-02-18 22:14:27,147 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 22:14:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2023-02-18 22:14:27,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 22:14:27,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:27,147 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:27,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 22:14:27,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:27,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:27,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1546453220, now seen corresponding path program 1 times [2023-02-18 22:14:27,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:27,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005646900] [2023-02-18 22:14:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:27,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:27,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:27,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:27,266 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 22:14:27,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:27,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005646900] [2023-02-18 22:14:27,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005646900] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:27,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:27,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 22:14:27,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100341860] [2023-02-18 22:14:27,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:27,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 22:14:27,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:27,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 22:14:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 22:14:27,268 INFO L87 Difference]: Start difference. First operand 121 states and 130 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 22:14:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:27,452 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2023-02-18 22:14:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:14:27,453 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 22:14:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:27,454 INFO L225 Difference]: With dead ends: 121 [2023-02-18 22:14:27,454 INFO L226 Difference]: Without dead ends: 121 [2023-02-18 22:14:27,455 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 22:14:27,456 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 13 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:27,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 419 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 22:14:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-18 22:14:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2023-02-18 22:14:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 115 states have internal predecessors, (123), 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 22:14:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2023-02-18 22:14:27,472 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 22 [2023-02-18 22:14:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:27,473 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2023-02-18 22:14:27,473 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 22:14:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2023-02-18 22:14:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 22:14:27,474 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:27,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:14:27,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 22:14:27,474 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:27,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:27,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1546453219, now seen corresponding path program 1 times [2023-02-18 22:14:27,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:27,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247205002] [2023-02-18 22:14:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:27,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:27,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:27,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:27,719 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 22:14:27,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:27,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247205002] [2023-02-18 22:14:27,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247205002] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:27,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:27,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 22:14:27,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239869435] [2023-02-18 22:14:27,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:27,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 22:14:27,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:27,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 22:14:27,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 22:14:27,727 INFO L87 Difference]: Start difference. First operand 120 states and 129 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 22:14:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:27,916 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2023-02-18 22:14:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:14:27,916 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 22:14:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:27,917 INFO L225 Difference]: With dead ends: 120 [2023-02-18 22:14:27,917 INFO L226 Difference]: Without dead ends: 120 [2023-02-18 22:14:27,917 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 22:14:27,918 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 11 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:27,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 443 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 22:14:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-18 22:14:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2023-02-18 22:14:27,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 65 states have (on average 1.876923076923077) internal successors, (122), 114 states have internal predecessors, (122), 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 22:14:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2023-02-18 22:14:27,922 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 22 [2023-02-18 22:14:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:27,922 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2023-02-18 22:14:27,922 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 22:14:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2023-02-18 22:14:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 22:14:27,923 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:27,923 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 22:14:27,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 22:14:27,923 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:27,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1726296005, now seen corresponding path program 1 times [2023-02-18 22:14:27,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:27,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240981234] [2023-02-18 22:14:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:27,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,088 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 22:14:28,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240981234] [2023-02-18 22:14:28,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240981234] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049683290] [2023-02-18 22:14:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:28,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:28,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:28,091 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 22:14:28,092 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 22:14:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 22:14:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:28,218 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 22:14:28,252 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 22:14:28,259 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 22:14:28,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:28,268 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 22:14:28,307 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 22:14:28,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:28,423 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 22:14:28,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049683290] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 22:14:28,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 22:14:28,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 18 [2023-02-18 22:14:28,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956425576] [2023-02-18 22:14:28,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:28,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 22:14:28,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:28,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 22:14:28,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=219, Unknown=2, NotChecked=62, Total=342 [2023-02-18 22:14:28,427 INFO L87 Difference]: Start difference. First operand 119 states and 128 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 22:14:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:28,638 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2023-02-18 22:14:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:14:28,638 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 22:14:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:28,639 INFO L225 Difference]: With dead ends: 136 [2023-02-18 22:14:28,639 INFO L226 Difference]: Without dead ends: 136 [2023-02-18 22:14:28,639 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 22:14:28,642 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 208 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:28,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 441 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 425 Invalid, 0 Unknown, 246 Unchecked, 0.2s Time] [2023-02-18 22:14:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-18 22:14:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2023-02-18 22:14:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 65 states have (on average 1.8615384615384616) internal successors, (121), 113 states have internal predecessors, (121), 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 22:14:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2023-02-18 22:14:28,648 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 25 [2023-02-18 22:14:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:28,648 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2023-02-18 22:14:28,649 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 22:14:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2023-02-18 22:14:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 22:14:28,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:28,649 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 22:14:28,659 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 22:14:28,857 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 22:14:28,857 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:28,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1726296006, now seen corresponding path program 1 times [2023-02-18 22:14:28,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:28,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529393332] [2023-02-18 22:14:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:28,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:28,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:29,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 22:14:29,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:29,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529393332] [2023-02-18 22:14:29,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529393332] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:29,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951556026] [2023-02-18 22:14:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:29,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:29,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:29,045 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 22:14:29,047 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 22:14:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:29,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 22:14:29,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:29,138 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 22:14:29,140 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 22:14:29,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:29,217 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 22:14:29,220 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 22:14:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:14:29,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:29,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951556026] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:29,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:14:29,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2023-02-18 22:14:29,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744899971] [2023-02-18 22:14:29,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:29,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 22:14:29,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:29,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 22:14:29,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-02-18 22:14:29,295 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 13 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 22:14:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:29,766 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2023-02-18 22:14:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 22:14:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 13 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 22:14:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:29,770 INFO L225 Difference]: With dead ends: 119 [2023-02-18 22:14:29,770 INFO L226 Difference]: Without dead ends: 119 [2023-02-18 22:14:29,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-02-18 22:14:29,771 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 217 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:29,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 828 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 22:14:29,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-18 22:14:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2023-02-18 22:14:29,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 65 states have (on average 1.8461538461538463) internal successors, (120), 112 states have internal predecessors, (120), 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 22:14:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2023-02-18 22:14:29,774 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 25 [2023-02-18 22:14:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:29,775 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2023-02-18 22:14:29,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 13 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 22:14:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2023-02-18 22:14:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 22:14:29,775 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:29,775 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 22:14:29,785 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 22:14:29,976 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 22:14:29,976 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:29,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1086704927, now seen corresponding path program 1 times [2023-02-18 22:14:29,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:29,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175536780] [2023-02-18 22:14:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:29,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:30,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:30,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:30,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:30,222 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 22:14:30,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:30,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175536780] [2023-02-18 22:14:30,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175536780] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:30,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147480095] [2023-02-18 22:14:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:30,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:30,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:30,224 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 22:14:30,226 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 22:14:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 22:14:30,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:30,333 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 22:14:30,339 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 22:14:30,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:30,363 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 22:14:30,379 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 22:14:30,381 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_523 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_523))) is different from true [2023-02-18 22:14:30,384 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_523 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_523))) is different from true [2023-02-18 22:14:30,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:30,389 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 22:14:30,424 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 22:14:30,427 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 22:14:30,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:30,439 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 22:14:30,440 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 22:14:30,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:30,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147480095] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:30,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:14:30,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 18 [2023-02-18 22:14:30,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201352113] [2023-02-18 22:14:30,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:30,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 22:14:30,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:30,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 22:14:30,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=226, Unknown=3, NotChecked=96, Total=380 [2023-02-18 22:14:30,466 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 22:14:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:30,744 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2023-02-18 22:14:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 22:14:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2023-02-18 22:14:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:30,746 INFO L225 Difference]: With dead ends: 126 [2023-02-18 22:14:30,746 INFO L226 Difference]: Without dead ends: 126 [2023-02-18 22:14:30,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=311, Unknown=3, NotChecked=114, Total=506 [2023-02-18 22:14:30,746 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 362 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:30,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 345 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 450 Invalid, 0 Unknown, 393 Unchecked, 0.2s Time] [2023-02-18 22:14:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-18 22:14:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2023-02-18 22:14:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 103 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 22:14:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2023-02-18 22:14:30,750 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 37 [2023-02-18 22:14:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:30,750 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2023-02-18 22:14:30,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 22:14:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2023-02-18 22:14:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 22:14:30,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:30,751 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 22:14:30,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 22:14:30,951 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 22:14:30,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:30,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1086704928, now seen corresponding path program 1 times [2023-02-18 22:14:30,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:30,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124769409] [2023-02-18 22:14:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:30,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:31,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:31,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:31,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:31,336 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 22:14:31,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:31,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124769409] [2023-02-18 22:14:31,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124769409] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:31,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603261067] [2023-02-18 22:14:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:31,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:31,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:31,338 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 22:14:31,340 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 22:14:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:31,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 22:14:31,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:31,464 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 22:14:31,476 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 22:14:31,484 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 22:14:31,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:31,499 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 22:14:31,525 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 22:14:31,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:31,556 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 22:14:31,593 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 22:14:31,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:31,638 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 18 treesize of output 35 [2023-02-18 22:14:31,642 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 27 treesize of output 19 [2023-02-18 22:14:31,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:31,700 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 90 treesize of output 86 [2023-02-18 22:14:31,705 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:14:31,706 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:14:31,709 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 12 treesize of output 8 [2023-02-18 22:14:31,710 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:14:31,712 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 40 treesize of output 30 [2023-02-18 22:14:31,746 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 9 treesize of output 7 [2023-02-18 22:14:31,751 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 22:14:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:31,760 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 16 treesize of output 18 [2023-02-18 22:14:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 16 not checked. [2023-02-18 22:14:31,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:31,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603261067] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:31,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:14:31,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 28 [2023-02-18 22:14:31,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458537630] [2023-02-18 22:14:31,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:31,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 22:14:31,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:31,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 22:14:31,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=731, Unknown=3, NotChecked=110, Total=930 [2023-02-18 22:14:31,843 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand has 29 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 25 states have internal predecessors, (55), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 22:14:32,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:32,795 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2023-02-18 22:14:32,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 22:14:32,797 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 25 states have internal predecessors, (55), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 37 [2023-02-18 22:14:32,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:32,798 INFO L225 Difference]: With dead ends: 127 [2023-02-18 22:14:32,798 INFO L226 Difference]: Without dead ends: 127 [2023-02-18 22:14:32,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=1589, Unknown=3, NotChecked=166, Total=1980 [2023-02-18 22:14:32,799 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 487 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 21 mSolverCounterUnsat, 36 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 36 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:32,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 700 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1144 Invalid, 36 Unknown, 272 Unchecked, 0.7s Time] [2023-02-18 22:14:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-18 22:14:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2023-02-18 22:14:32,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 94 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 22:14:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2023-02-18 22:14:32,802 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 37 [2023-02-18 22:14:32,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:32,802 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2023-02-18 22:14:32,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 25 states have internal predecessors, (55), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 22:14:32,802 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2023-02-18 22:14:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 22:14:32,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:32,803 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 22:14:32,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 22:14:33,013 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 22:14:33,013 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:33,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1436990998, now seen corresponding path program 1 times [2023-02-18 22:14:33,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:33,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460819765] [2023-02-18 22:14:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,089 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 22:14:33,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:33,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460819765] [2023-02-18 22:14:33,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460819765] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:33,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:33,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 22:14:33,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88762488] [2023-02-18 22:14:33,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:33,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 22:14:33,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:33,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 22:14:33,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 22:14:33,090 INFO L87 Difference]: Start difference. First operand 99 states and 108 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 22:14:33,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:33,207 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2023-02-18 22:14:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:14:33,207 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 22:14:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:33,208 INFO L225 Difference]: With dead ends: 115 [2023-02-18 22:14:33,208 INFO L226 Difference]: Without dead ends: 115 [2023-02-18 22:14:33,208 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 22:14:33,208 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 77 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:33,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 289 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:14:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-18 22:14:33,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2023-02-18 22:14:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.5384615384615385) internal successors, (100), 92 states have internal predecessors, (100), 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 22:14:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2023-02-18 22:14:33,211 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 40 [2023-02-18 22:14:33,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:33,211 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2023-02-18 22:14:33,211 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 22:14:33,211 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2023-02-18 22:14:33,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 22:14:33,212 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:33,212 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 22:14:33,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 22:14:33,212 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:33,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1436990997, now seen corresponding path program 1 times [2023-02-18 22:14:33,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:33,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295328351] [2023-02-18 22:14:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:33,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,362 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 22:14:33,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:33,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295328351] [2023-02-18 22:14:33,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295328351] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:33,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:14:33,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 22:14:33,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444650425] [2023-02-18 22:14:33,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:33,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 22:14:33,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 22:14:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 22:14:33,363 INFO L87 Difference]: Start difference. First operand 97 states and 106 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 22:14:33,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:33,475 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2023-02-18 22:14:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:14:33,475 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 22:14:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:33,476 INFO L225 Difference]: With dead ends: 95 [2023-02-18 22:14:33,476 INFO L226 Difference]: Without dead ends: 95 [2023-02-18 22:14:33,476 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 22:14:33,477 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 78 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:33,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 300 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:14:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-18 22:14:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-02-18 22:14:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.5076923076923077) internal successors, (98), 90 states have internal predecessors, (98), 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 22:14:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2023-02-18 22:14:33,479 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 40 [2023-02-18 22:14:33,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:33,479 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2023-02-18 22:14:33,479 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 22:14:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2023-02-18 22:14:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 22:14:33,480 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:33,480 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 22:14:33,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 22:14:33,480 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:33,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:33,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1596801691, now seen corresponding path program 1 times [2023-02-18 22:14:33,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:33,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146061930] [2023-02-18 22:14:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:33,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,803 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 22:14:33,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:33,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146061930] [2023-02-18 22:14:33,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146061930] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:33,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589318027] [2023-02-18 22:14:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:33,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:33,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:33,805 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 22:14:33,807 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 22:14:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:33,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 22:14:33,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:34,006 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 22:14:34,053 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)) (exists ((v_ArrVal_1056 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1056))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-18 22:14:34,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:34,062 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 22:14:34,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:34,067 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 22:14:34,111 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 22:14:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 22:14:34,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 22:14:34,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589318027] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:14:34,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 22:14:34,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 26 [2023-02-18 22:14:34,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320045268] [2023-02-18 22:14:34,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:14:34,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 22:14:34,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:34,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 22:14:34,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=575, Unknown=2, NotChecked=48, Total=702 [2023-02-18 22:14:34,122 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 22:14:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:34,544 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2023-02-18 22:14:34,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 22:14:34,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2023-02-18 22:14:34,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:34,548 INFO L225 Difference]: With dead ends: 145 [2023-02-18 22:14:34,548 INFO L226 Difference]: Without dead ends: 145 [2023-02-18 22:14:34,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=811, Unknown=2, NotChecked=58, Total=992 [2023-02-18 22:14:34,549 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 89 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:34,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 904 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 804 Invalid, 3 Unknown, 201 Unchecked, 0.4s Time] [2023-02-18 22:14:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-18 22:14:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 94. [2023-02-18 22:14:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 89 states have internal predecessors, (98), 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 22:14:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2023-02-18 22:14:34,551 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 41 [2023-02-18 22:14:34,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:34,552 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2023-02-18 22:14:34,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 22:14:34,552 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2023-02-18 22:14:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 22:14:34,552 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:34,552 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 22:14:34,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 22:14:34,759 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 22:14:34,760 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:34,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:34,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1596801690, now seen corresponding path program 1 times [2023-02-18 22:14:34,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:34,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784942758] [2023-02-18 22:14:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:34,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:35,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:35,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:35,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:35,292 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 22:14:35,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:35,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784942758] [2023-02-18 22:14:35,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784942758] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:35,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314732180] [2023-02-18 22:14:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:35,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:35,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:35,294 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 22:14:35,297 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 22:14:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:35,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-18 22:14:35,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:35,444 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 22:14:35,600 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 22:14:35,603 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 22:14:35,664 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1216 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1216))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1215 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1215))) (exists ((v_ArrVal_1212 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1212))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-18 22:14:35,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:35,677 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 22:14:35,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:35,683 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 16 treesize of output 18 [2023-02-18 22:14:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:35,687 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 21 treesize of output 21 [2023-02-18 22:14:35,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:35,690 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 22:14:35,713 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 22:14:35,716 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 22 treesize of output 10 [2023-02-18 22:14:35,752 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 22:14:35,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:35,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314732180] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:35,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:14:35,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2023-02-18 22:14:35,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523650577] [2023-02-18 22:14:35,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:35,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 22:14:35,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:35,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 22:14:35,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1154, Unknown=2, NotChecked=68, Total=1332 [2023-02-18 22:14:35,913 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 33 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 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 22:14:37,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:37,101 INFO L93 Difference]: Finished difference Result 158 states and 173 transitions. [2023-02-18 22:14:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 22:14:37,101 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 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 22:14:37,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:37,102 INFO L225 Difference]: With dead ends: 158 [2023-02-18 22:14:37,102 INFO L226 Difference]: Without dead ends: 158 [2023-02-18 22:14:37,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=2538, Unknown=5, NotChecked=104, Total=2970 [2023-02-18 22:14:37,103 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 549 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 10 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:37,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 1356 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1504 Invalid, 3 Unknown, 170 Unchecked, 0.8s Time] [2023-02-18 22:14:37,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-18 22:14:37,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 102. [2023-02-18 22:14:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 97 states have internal predecessors, (106), 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 22:14:37,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2023-02-18 22:14:37,106 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 41 [2023-02-18 22:14:37,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:37,106 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2023-02-18 22:14:37,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 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 22:14:37,106 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2023-02-18 22:14:37,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 22:14:37,106 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:37,106 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 22:14:37,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 22:14:37,314 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 22:14:37,315 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:37,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:37,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1993086700, now seen corresponding path program 1 times [2023-02-18 22:14:37,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:37,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097112040] [2023-02-18 22:14:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:37,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:37,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:37,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:37,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:37,745 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 22:14:37,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097112040] [2023-02-18 22:14:37,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097112040] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710479297] [2023-02-18 22:14:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:37,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:37,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:37,747 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 22:14:37,797 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 22:14:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-18 22:14:37,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:38,043 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 22:14:38,076 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1406 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1406))) (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2023-02-18 22:14:38,078 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1407 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1407))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-18 22:14:38,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:38,084 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 22:14:38,115 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 22:14:38,130 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 22:14:38,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:14:38,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710479297] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:38,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:14:38,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2023-02-18 22:14:38,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046501421] [2023-02-18 22:14:38,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:14:38,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 22:14:38,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:14:38,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 22:14:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1019, Unknown=6, NotChecked=130, Total=1260 [2023-02-18 22:14:38,208 INFO L87 Difference]: Start difference. First operand 102 states and 112 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 22:14:38,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:14:38,779 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2023-02-18 22:14:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 22:14:38,780 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 22:14:38,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:14:38,780 INFO L225 Difference]: With dead ends: 104 [2023-02-18 22:14:38,780 INFO L226 Difference]: Without dead ends: 104 [2023-02-18 22:14:38,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=1752, Unknown=8, NotChecked=174, Total=2162 [2023-02-18 22:14:38,781 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 301 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 22:14:38,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 846 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 883 Invalid, 0 Unknown, 200 Unchecked, 0.4s Time] [2023-02-18 22:14:38,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-18 22:14:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2023-02-18 22:14:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 93 states have internal predecessors, (101), 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 22:14:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2023-02-18 22:14:38,784 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 44 [2023-02-18 22:14:38,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:14:38,784 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2023-02-18 22:14:38,784 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 22:14:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2023-02-18 22:14:38,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 22:14:38,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:14:38,784 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 22:14:38,792 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 22:14:38,992 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 22:14:38,994 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-02-18 22:14:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:14:38,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1144176968, now seen corresponding path program 1 times [2023-02-18 22:14:38,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:14:38,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904681255] [2023-02-18 22:14:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:38,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:14:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:39,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 22:14:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:39,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 22:14:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:39,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 22:14:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:39,743 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 22:14:39,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:14:39,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904681255] [2023-02-18 22:14:39,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904681255] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:14:39,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999819891] [2023-02-18 22:14:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:14:39,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:14:39,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:14:39,746 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 22:14:39,749 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 22:14:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:14:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-18 22:14:39,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:14:39,934 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 22:14:40,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:40,034 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 22:14:40,085 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 22:14:40,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:40,140 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 28 treesize of output 43 [2023-02-18 22:14:40,143 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 35 treesize of output 25 [2023-02-18 22:14:40,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:40,244 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 91 treesize of output 85 [2023-02-18 22:14:40,255 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 61 treesize of output 41 [2023-02-18 22:14:40,258 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 15 treesize of output 7 [2023-02-18 22:14:40,264 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 22:14:40,265 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:14:40,267 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 22:14:40,341 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)) (exists ((v_ArrVal_1574 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1574))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1573 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1573))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-18 22:14:40,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:40,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:40,353 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 97 treesize of output 133 [2023-02-18 22:14:40,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:14:40,358 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 136 treesize of output 120 [2023-02-18 22:14:40,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:40,364 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 32 treesize of output 119 [2023-02-18 22:14:40,379 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:14:41,249 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 5232 treesize of output 4580 [2023-02-18 22:14:49,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:14:49,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 293 select indices, 293 select index equivalence classes, 0 disjoint index pairs (out of 42778 index pairs), introduced 445 new quantified variables, introduced 42778 case distinctions, treesize of input 10889 treesize of output 349015