./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/sll2c_prepend_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f682d6a9f9df80cf11b356f08ea6be5ab5adaf1b414fc8a476877af8610cc552 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:46:48,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:46:48,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:46:49,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:46:49,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:46:49,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:46:49,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:46:49,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:46:49,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:46:49,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:46:49,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:46:49,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:46:49,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:46:49,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:46:49,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:46:49,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:46:49,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:46:49,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:46:49,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:46:49,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:46:49,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:46:49,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:46:49,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:46:49,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:46:49,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:46:49,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:46:49,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:46:49,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:46:49,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:46:49,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:46:49,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:46:49,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:46:49,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:46:49,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:46:49,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:46:49,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:46:49,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:46:49,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:46:49,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:46:49,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:46:49,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:46:49,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:46:49,093 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:46:49,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:46:49,096 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:46:49,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:46:49,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:46:49,097 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:46:49,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:46:49,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:46:49,098 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:46:49,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:46:49,098 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:46:49,099 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:46:49,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:46:49,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:46:49,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:46:49,099 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:46:49,099 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:46:49,099 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:46:49,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:46:49,100 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:46:49,100 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:46:49,100 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:46:49,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:46:49,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:46:49,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:46:49,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:46:49,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:46:49,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:46:49,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:46:49,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:46:49,101 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:46:49,102 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:46:49,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:46:49,102 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:46:49,102 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f682d6a9f9df80cf11b356f08ea6be5ab5adaf1b414fc8a476877af8610cc552 [2023-02-16 03:46:49,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:46:49,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:46:49,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:46:49,323 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:46:49,323 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:46:49,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_prepend_equal.i [2023-02-16 03:46:50,402 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:46:50,605 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:46:50,606 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i [2023-02-16 03:46:50,612 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9e56ac28/5b69f76e518243a2b054efd85d7004be/FLAGa66491e3a [2023-02-16 03:46:50,623 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9e56ac28/5b69f76e518243a2b054efd85d7004be [2023-02-16 03:46:50,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:46:50,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:46:50,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:46:50,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:46:50,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:46:50,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:50,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42dbb5e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50, skipping insertion in model container [2023-02-16 03:46:50,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:50,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:46:50,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:46:50,906 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i[24458,24471] [2023-02-16 03:46:50,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:46:50,920 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:46:50,963 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i[24458,24471] [2023-02-16 03:46:50,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:46:50,987 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:46:50,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50 WrapperNode [2023-02-16 03:46:50,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:46:50,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:46:50,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:46:50,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:46:50,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:51,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:51,034 INFO L138 Inliner]: procedures = 127, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 143 [2023-02-16 03:46:51,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:46:51,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:46:51,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:46:51,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:46:51,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:51,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:51,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:51,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:51,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:51,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:51,064 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:51,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:51,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:46:51,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:46:51,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:46:51,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:46:51,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50" (1/1) ... [2023-02-16 03:46:51,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:46:51,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:46:51,126 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) [2023-02-16 03:46:51,132 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 [2023-02-16 03:46:51,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 03:46:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 03:46:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-16 03:46:51,153 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-16 03:46:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 03:46:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 03:46:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 03:46:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-16 03:46:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-16 03:46:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:46:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-16 03:46:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 03:46:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:46:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:46:51,295 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:46:51,301 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:46:51,612 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:46:51,617 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:46:51,618 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-16 03:46:51,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:46:51 BoogieIcfgContainer [2023-02-16 03:46:51,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:46:51,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:46:51,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:46:51,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:46:51,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:46:50" (1/3) ... [2023-02-16 03:46:51,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecce9cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:46:51, skipping insertion in model container [2023-02-16 03:46:51,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:46:50" (2/3) ... [2023-02-16 03:46:51,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecce9cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:46:51, skipping insertion in model container [2023-02-16 03:46:51,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:46:51" (3/3) ... [2023-02-16 03:46:51,636 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_equal.i [2023-02-16 03:46:51,648 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:46:51,648 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2023-02-16 03:46:51,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:46:51,702 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;@86e52d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:46:51,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-02-16 03:46:51,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 114 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:46:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:46:51,709 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:46:51,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:46:51,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:46:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:46:51,715 INFO L85 PathProgramCache]: Analyzing trace with hash 895152213, now seen corresponding path program 1 times [2023-02-16 03:46:51,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:46:51,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677996171] [2023-02-16 03:46:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:51,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:46:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:46:51,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:46:51,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677996171] [2023-02-16 03:46:51,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677996171] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:46:51,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:46:51,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:46:51,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221933893] [2023-02-16 03:46:51,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:46:51,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:46:51,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:46:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:46:51,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:46:51,978 INFO L87 Difference]: Start difference. First operand has 119 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 114 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:46:52,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:46:52,096 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2023-02-16 03:46:52,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:46:52,098 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 [2023-02-16 03:46:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:46:52,104 INFO L225 Difference]: With dead ends: 117 [2023-02-16 03:46:52,105 INFO L226 Difference]: Without dead ends: 114 [2023-02-16 03:46:52,109 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 [2023-02-16 03:46:52,113 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:46:52,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 183 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:46:52,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-16 03:46:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-02-16 03:46:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 109 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:46:52,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2023-02-16 03:46:52,143 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 6 [2023-02-16 03:46:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:46:52,144 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2023-02-16 03:46:52,144 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) [2023-02-16 03:46:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2023-02-16 03:46:52,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:46:52,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:46:52,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:46:52,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:46:52,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:46:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:46:52,146 INFO L85 PathProgramCache]: Analyzing trace with hash 895152214, now seen corresponding path program 1 times [2023-02-16 03:46:52,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:46:52,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018025126] [2023-02-16 03:46:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:52,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:46:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:46:52,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:46:52,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018025126] [2023-02-16 03:46:52,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018025126] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:46:52,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:46:52,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:46:52,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37441032] [2023-02-16 03:46:52,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:46:52,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:46:52,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:46:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:46:52,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:46:52,289 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:46:52,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:46:52,395 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2023-02-16 03:46:52,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:46:52,395 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 [2023-02-16 03:46:52,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:46:52,396 INFO L225 Difference]: With dead ends: 112 [2023-02-16 03:46:52,396 INFO L226 Difference]: Without dead ends: 112 [2023-02-16 03:46:52,396 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 [2023-02-16 03:46:52,397 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:46:52,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:46:52,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-16 03:46:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-02-16 03:46:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 60 states have (on average 1.9) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:46:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2023-02-16 03:46:52,418 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 6 [2023-02-16 03:46:52,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:46:52,419 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2023-02-16 03:46:52,419 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) [2023-02-16 03:46:52,419 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2023-02-16 03:46:52,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 03:46:52,420 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:46:52,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:46:52,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:46:52,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:46:52,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:46:52,421 INFO L85 PathProgramCache]: Analyzing trace with hash 972366423, now seen corresponding path program 1 times [2023-02-16 03:46:52,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:46:52,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997509416] [2023-02-16 03:46:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:52,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:46:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:52,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:46:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:46:52,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:46:52,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997509416] [2023-02-16 03:46:52,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997509416] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:46:52,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:46:52,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:46:52,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199204457] [2023-02-16 03:46:52,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:46:52,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:46:52,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:46:52,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:46:52,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:46:52,496 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 03:46:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:46:52,581 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2023-02-16 03:46:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:46:52,582 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 [2023-02-16 03:46:52,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:46:52,586 INFO L225 Difference]: With dead ends: 119 [2023-02-16 03:46:52,586 INFO L226 Difference]: Without dead ends: 119 [2023-02-16 03:46:52,586 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 [2023-02-16 03:46:52,587 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 5 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:46:52,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 275 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:46:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-16 03:46:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2023-02-16 03:46:52,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 108 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:46:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2023-02-16 03:46:52,594 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 13 [2023-02-16 03:46:52,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:46:52,595 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2023-02-16 03:46:52,595 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) [2023-02-16 03:46:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2023-02-16 03:46:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 03:46:52,595 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:46:52,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:46:52,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 03:46:52,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:46:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:46:52,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1029573860, now seen corresponding path program 1 times [2023-02-16 03:46:52,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:46:52,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886819882] [2023-02-16 03:46:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:52,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:46:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:52,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:46:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:52,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:46:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:46:52,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:46:52,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886819882] [2023-02-16 03:46:52,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886819882] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:46:52,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:46:52,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:46:52,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748005142] [2023-02-16 03:46:52,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:46:52,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:46:52,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:46:52,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:46:52,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:46:52,753 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 03:46:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:46:52,925 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2023-02-16 03:46:52,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:46:52,926 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 [2023-02-16 03:46:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:46:52,927 INFO L225 Difference]: With dead ends: 113 [2023-02-16 03:46:52,927 INFO L226 Difference]: Without dead ends: 113 [2023-02-16 03:46:52,928 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 [2023-02-16 03:46:52,929 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 13 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:46:52,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 387 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:46:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-16 03:46:52,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2023-02-16 03:46:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 61 states have (on average 1.8688524590163935) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:46:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2023-02-16 03:46:52,934 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 22 [2023-02-16 03:46:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:46:52,934 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2023-02-16 03:46:52,934 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) [2023-02-16 03:46:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2023-02-16 03:46:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 03:46:52,935 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:46:52,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:46:52,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 03:46:52,936 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:46:52,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:46:52,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1029573859, now seen corresponding path program 1 times [2023-02-16 03:46:52,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:46:52,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666011519] [2023-02-16 03:46:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:52,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:46:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:53,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:46:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:53,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:46:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:46:53,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:46:53,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666011519] [2023-02-16 03:46:53,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666011519] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:46:53,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:46:53,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:46:53,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205402380] [2023-02-16 03:46:53,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:46:53,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:46:53,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:46:53,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:46:53,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:46:53,101 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 03:46:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:46:53,265 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2023-02-16 03:46:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:46:53,266 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 [2023-02-16 03:46:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:46:53,266 INFO L225 Difference]: With dead ends: 112 [2023-02-16 03:46:53,266 INFO L226 Difference]: Without dead ends: 112 [2023-02-16 03:46:53,267 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 [2023-02-16 03:46:53,267 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 11 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:46:53,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 411 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:46:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-16 03:46:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2023-02-16 03:46:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.8524590163934427) internal successors, (113), 106 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:46:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2023-02-16 03:46:53,272 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 22 [2023-02-16 03:46:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:46:53,272 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2023-02-16 03:46:53,272 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) [2023-02-16 03:46:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2023-02-16 03:46:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 03:46:53,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:46:53,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:46:53,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 03:46:53,273 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:46:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:46:53,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1673413691, now seen corresponding path program 1 times [2023-02-16 03:46:53,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:46:53,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236630596] [2023-02-16 03:46:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:53,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:46:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:53,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:46:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:53,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:46:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:46:53,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:46:53,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236630596] [2023-02-16 03:46:53,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236630596] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:46:53,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974044040] [2023-02-16 03:46:53,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:53,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:46:53,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:46:53,449 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) [2023-02-16 03:46:53,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:46:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:53,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 03:46:53,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:46:53,566 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 [2023-02-16 03:46:53,594 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 [2023-02-16 03:46:53,604 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 [2023-02-16 03:46:53,628 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:46:53,628 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 18 [2023-02-16 03:46:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-02-16 03:46:53,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:46:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:46:53,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974044040] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:46:53,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:46:53,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 18 [2023-02-16 03:46:53,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725911507] [2023-02-16 03:46:53,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:46:53,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-16 03:46:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:46:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-16 03:46:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=219, Unknown=2, NotChecked=62, Total=342 [2023-02-16 03:46:53,873 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 03:46:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:46:54,131 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2023-02-16 03:46:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:46:54,131 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 [2023-02-16 03:46:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:46:54,132 INFO L225 Difference]: With dead ends: 128 [2023-02-16 03:46:54,132 INFO L226 Difference]: Without dead ends: 128 [2023-02-16 03:46:54,133 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 [2023-02-16 03:46:54,133 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 97 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:46:54,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 483 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 475 Invalid, 0 Unknown, 266 Unchecked, 0.2s Time] [2023-02-16 03:46:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-16 03:46:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 110. [2023-02-16 03:46:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 61 states have (on average 1.8360655737704918) internal successors, (112), 105 states have internal predecessors, (112), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:46:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2023-02-16 03:46:54,152 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 25 [2023-02-16 03:46:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:46:54,152 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2023-02-16 03:46:54,152 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) [2023-02-16 03:46:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2023-02-16 03:46:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 03:46:54,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:46:54,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:46:54,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 03:46:54,358 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 [2023-02-16 03:46:54,359 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:46:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:46:54,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1673413690, now seen corresponding path program 1 times [2023-02-16 03:46:54,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:46:54,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595245583] [2023-02-16 03:46:54,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:54,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:46:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:54,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:46:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:54,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:46:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:46:54,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:46:54,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595245583] [2023-02-16 03:46:54,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595245583] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:46:54,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014825456] [2023-02-16 03:46:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:54,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:46:54,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:46:54,761 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) [2023-02-16 03:46:54,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:46:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:54,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 03:46:54,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:46:54,944 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 [2023-02-16 03:46:54,947 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 [2023-02-16 03:46:55,080 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_363 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_363))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-16 03:46:55,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:46:55,124 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 [2023-02-16 03:46:55,131 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:46:55,132 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 11 [2023-02-16 03:46:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-16 03:46:55,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:46:55,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014825456] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:46:55,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:46:55,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2023-02-16 03:46:55,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336716610] [2023-02-16 03:46:55,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:46:55,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 03:46:55,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:46:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 03:46:55,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=289, Unknown=1, NotChecked=34, Total=380 [2023-02-16 03:46:55,244 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-16 03:46:55,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:46:55,666 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2023-02-16 03:46:55,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:46:55,668 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2023-02-16 03:46:55,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:46:55,669 INFO L225 Difference]: With dead ends: 110 [2023-02-16 03:46:55,669 INFO L226 Difference]: Without dead ends: 110 [2023-02-16 03:46:55,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=350, Unknown=1, NotChecked=38, Total=462 [2023-02-16 03:46:55,670 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 101 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:46:55,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 622 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 871 Invalid, 0 Unknown, 113 Unchecked, 0.4s Time] [2023-02-16 03:46:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-16 03:46:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2023-02-16 03:46:55,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 61 states have (on average 1.819672131147541) internal successors, (111), 104 states have internal predecessors, (111), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:46:55,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2023-02-16 03:46:55,680 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 25 [2023-02-16 03:46:55,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:46:55,681 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2023-02-16 03:46:55,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-16 03:46:55,681 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2023-02-16 03:46:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 03:46:55,681 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:46:55,684 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] [2023-02-16 03:46:55,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 03:46:55,889 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 [2023-02-16 03:46:55,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:46:55,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:46:55,890 INFO L85 PathProgramCache]: Analyzing trace with hash 512234271, now seen corresponding path program 1 times [2023-02-16 03:46:55,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:46:55,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562289483] [2023-02-16 03:46:55,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:55,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:46:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:56,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:46:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:56,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:46:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:56,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:46:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 03:46:56,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:46:56,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562289483] [2023-02-16 03:46:56,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562289483] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:46:56,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687434117] [2023-02-16 03:46:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:56,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:46:56,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:46:56,224 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) [2023-02-16 03:46:56,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:46:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:56,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 03:46:56,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:46:56,360 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 [2023-02-16 03:46:56,370 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 [2023-02-16 03:46:56,419 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-02-16 03:46:56,419 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 19 treesize of output 16 [2023-02-16 03:46:56,446 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 [2023-02-16 03:46:56,450 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-02-16 03:46:56,467 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:46:56,467 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 14 [2023-02-16 03:46:56,499 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 [2023-02-16 03:46:56,506 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 [2023-02-16 03:46:56,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:46:56,535 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 [2023-02-16 03:46:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 18 not checked. [2023-02-16 03:46:56,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:46:56,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687434117] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:46:56,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:46:56,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2023-02-16 03:46:56,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004163129] [2023-02-16 03:46:56,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:46:56,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 03:46:56,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:46:56,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 03:46:56,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=171, Unknown=2, NotChecked=54, Total=272 [2023-02-16 03:46:56,590 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-16 03:46:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:46:56,925 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2023-02-16 03:46:56,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:46:56,926 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2023-02-16 03:46:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:46:56,927 INFO L225 Difference]: With dead ends: 118 [2023-02-16 03:46:56,927 INFO L226 Difference]: Without dead ends: 118 [2023-02-16 03:46:56,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=246, Unknown=2, NotChecked=66, Total=380 [2023-02-16 03:46:56,927 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 244 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:46:56,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 385 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 542 Invalid, 0 Unknown, 240 Unchecked, 0.3s Time] [2023-02-16 03:46:56,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-16 03:46:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2023-02-16 03:46:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 95 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:46:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2023-02-16 03:46:56,930 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 37 [2023-02-16 03:46:56,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:46:56,930 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2023-02-16 03:46:56,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-16 03:46:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2023-02-16 03:46:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 03:46:56,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:46:56,931 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] [2023-02-16 03:46:56,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-16 03:46:57,138 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 [2023-02-16 03:46:57,139 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:46:57,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:46:57,139 INFO L85 PathProgramCache]: Analyzing trace with hash 512234272, now seen corresponding path program 1 times [2023-02-16 03:46:57,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:46:57,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359883837] [2023-02-16 03:46:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:57,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:46:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:57,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:46:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:57,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:46:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:57,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:46:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 03:46:57,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:46:57,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359883837] [2023-02-16 03:46:57,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359883837] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:46:57,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533824717] [2023-02-16 03:46:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:57,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:46:57,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:46:57,538 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) [2023-02-16 03:46:57,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:46:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:57,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-16 03:46:57,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:46:57,685 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 [2023-02-16 03:46:57,713 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 [2023-02-16 03:46:57,731 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 [2023-02-16 03:46:57,747 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_683 Int)) (= |c_#length| (store |c_old(#length)| |c_node_create_#res#1.base| v_ArrVal_683))) (< |c_node_create_#res#1.base| |c_#StackHeapBarrier|)) is different from true [2023-02-16 03:46:57,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:46:57,759 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 [2023-02-16 03:46:57,818 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 [2023-02-16 03:46:57,882 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:46:57,882 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 18 [2023-02-16 03:46:57,947 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 [2023-02-16 03:46:58,033 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:46:58,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2023-02-16 03:46:58,041 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 [2023-02-16 03:46:58,113 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:46:58,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2023-02-16 03:46:58,147 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 [2023-02-16 03:46:58,155 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 [2023-02-16 03:46:58,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:46:58,180 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 [2023-02-16 03:46:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 18 not checked. [2023-02-16 03:46:58,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:46:58,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533824717] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:46:58,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:46:58,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2023-02-16 03:46:58,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387863179] [2023-02-16 03:46:58,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:46:58,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 03:46:58,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:46:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 03:46:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=631, Unknown=3, NotChecked=156, Total=870 [2023-02-16 03:46:58,308 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 28 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:46:59,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:46:59,291 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2023-02-16 03:46:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 03:46:59,292 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 37 [2023-02-16 03:46:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:46:59,292 INFO L225 Difference]: With dead ends: 119 [2023-02-16 03:46:59,293 INFO L226 Difference]: Without dead ends: 119 [2023-02-16 03:46:59,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=1438, Unknown=3, NotChecked=240, Total=1892 [2023-02-16 03:46:59,294 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 459 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:46:59,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 496 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 854 Invalid, 0 Unknown, 360 Unchecked, 0.5s Time] [2023-02-16 03:46:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-16 03:46:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2023-02-16 03:46:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 86 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:46:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2023-02-16 03:46:59,299 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 37 [2023-02-16 03:46:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:46:59,299 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2023-02-16 03:46:59,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:46:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2023-02-16 03:46:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-16 03:46:59,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:46:59,300 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] [2023-02-16 03:46:59,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 03:46:59,500 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 [2023-02-16 03:46:59,501 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:46:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:46:59,501 INFO L85 PathProgramCache]: Analyzing trace with hash -47629334, now seen corresponding path program 1 times [2023-02-16 03:46:59,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:46:59,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686754929] [2023-02-16 03:46:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:59,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:46:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:59,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:46:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:59,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:46:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:59,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:46:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-16 03:46:59,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:46:59,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686754929] [2023-02-16 03:46:59,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686754929] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:46:59,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:46:59,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:46:59,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942504915] [2023-02-16 03:46:59,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:46:59,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:46:59,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:46:59,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:46:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:46:59,603 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-16 03:46:59,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:46:59,736 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2023-02-16 03:46:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:46:59,737 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 [2023-02-16 03:46:59,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:46:59,737 INFO L225 Difference]: With dead ends: 107 [2023-02-16 03:46:59,737 INFO L226 Difference]: Without dead ends: 107 [2023-02-16 03:46:59,738 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 [2023-02-16 03:46:59,738 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 68 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:46:59,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 266 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:46:59,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-16 03:46:59,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2023-02-16 03:46:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 84 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:46:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2023-02-16 03:46:59,741 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 40 [2023-02-16 03:46:59,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:46:59,743 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2023-02-16 03:46:59,743 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) [2023-02-16 03:46:59,743 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2023-02-16 03:46:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-16 03:46:59,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:46:59,746 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] [2023-02-16 03:46:59,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-16 03:46:59,747 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:46:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:46:59,747 INFO L85 PathProgramCache]: Analyzing trace with hash -47629333, now seen corresponding path program 1 times [2023-02-16 03:46:59,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:46:59,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168716805] [2023-02-16 03:46:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:59,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:46:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:59,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:46:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:59,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:46:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:59,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:46:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:46:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 03:46:59,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:46:59,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168716805] [2023-02-16 03:46:59,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168716805] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:46:59,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:46:59,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:46:59,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589847920] [2023-02-16 03:46:59,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:46:59,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:46:59,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:46:59,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:46:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:46:59,884 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-16 03:46:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:46:59,990 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2023-02-16 03:46:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:46:59,990 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 [2023-02-16 03:46:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:46:59,991 INFO L225 Difference]: With dead ends: 87 [2023-02-16 03:46:59,991 INFO L226 Difference]: Without dead ends: 87 [2023-02-16 03:46:59,991 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 [2023-02-16 03:46:59,991 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 69 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:46:59,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 277 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:46:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-02-16 03:46:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-02-16 03:46:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 61 states have (on average 1.459016393442623) internal successors, (89), 82 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:46:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2023-02-16 03:46:59,993 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 40 [2023-02-16 03:46:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:46:59,993 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2023-02-16 03:46:59,993 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) [2023-02-16 03:46:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2023-02-16 03:46:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-16 03:46:59,994 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:46:59,994 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] [2023-02-16 03:46:59,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-16 03:46:59,994 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:46:59,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:46:59,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1476263067, now seen corresponding path program 1 times [2023-02-16 03:46:59,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:46:59,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707772564] [2023-02-16 03:46:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:46:59,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:47:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:00,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:47:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:00,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:47:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:00,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:47:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:47:00,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:47:00,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707772564] [2023-02-16 03:47:00,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707772564] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:00,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216922006] [2023-02-16 03:47:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:00,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:00,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:47:00,455 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) [2023-02-16 03:47:00,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:47:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:00,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-16 03:47:00,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:47:00,643 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 [2023-02-16 03:47:00,775 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 [2023-02-16 03:47:00,854 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1057 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1057))))) is different from true [2023-02-16 03:47:00,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:00,868 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 [2023-02-16 03:47:00,875 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-02-16 03:47:00,875 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 18 [2023-02-16 03:47:00,953 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 [2023-02-16 03:47:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-02-16 03:47:00,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:47:01,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216922006] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:01,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:47:01,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2023-02-16 03:47:01,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340603144] [2023-02-16 03:47:01,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:47:01,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 03:47:01,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:47:01,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 03:47:01,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=653, Unknown=21, NotChecked=52, Total=812 [2023-02-16 03:47:01,073 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 28 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 03:47:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:47:01,874 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2023-02-16 03:47:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 03:47:01,874 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2023-02-16 03:47:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:47:01,875 INFO L225 Difference]: With dead ends: 150 [2023-02-16 03:47:01,875 INFO L226 Difference]: Without dead ends: 150 [2023-02-16 03:47:01,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=1234, Unknown=27, NotChecked=74, Total=1560 [2023-02-16 03:47:01,876 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 490 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:47:01,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 881 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1190 Invalid, 3 Unknown, 140 Unchecked, 0.6s Time] [2023-02-16 03:47:01,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-16 03:47:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 86. [2023-02-16 03:47:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.435483870967742) internal successors, (89), 81 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:47:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2023-02-16 03:47:01,885 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 41 [2023-02-16 03:47:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:47:01,885 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2023-02-16 03:47:01,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 03:47:01,886 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2023-02-16 03:47:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-16 03:47:01,886 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:47:01,886 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] [2023-02-16 03:47:01,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 03:47:02,092 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 [2023-02-16 03:47:02,092 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:47:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:47:02,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1476263066, now seen corresponding path program 1 times [2023-02-16 03:47:02,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:47:02,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950147137] [2023-02-16 03:47:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:02,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:47:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:02,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:47:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:02,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:47:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:02,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:47:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:47:02,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:47:02,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950147137] [2023-02-16 03:47:02,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950147137] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:02,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094492486] [2023-02-16 03:47:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:02,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:02,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:47:02,880 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) [2023-02-16 03:47:02,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:47:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:03,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-16 03:47:03,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:47:03,039 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 [2023-02-16 03:47:03,042 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 [2023-02-16 03:47:03,297 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 [2023-02-16 03:47:03,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-16 03:47:03,400 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_1223 (Array Int Int)) (v_ArrVal_1222 (Array Int Int))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1222)) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |node_create_~temp~0#1.base|) 0) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1223)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2023-02-16 03:47:03,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:03,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-16 03:47:03,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:03,438 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 [2023-02-16 03:47:03,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:03,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-02-16 03:47:03,450 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-16 03:47:03,451 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 15 [2023-02-16 03:47:03,491 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 [2023-02-16 03:47:03,493 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 [2023-02-16 03:47:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-02-16 03:47:03,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:47:03,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094492486] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:03,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:47:03,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2023-02-16 03:47:03,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755373712] [2023-02-16 03:47:03,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:47:03,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-16 03:47:03,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:47:03,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-16 03:47:03,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=893, Unknown=1, NotChecked=60, Total=1056 [2023-02-16 03:47:03,725 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 29 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 03:47:04,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:47:04,655 INFO L93 Difference]: Finished difference Result 139 states and 152 transitions. [2023-02-16 03:47:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 03:47:04,656 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2023-02-16 03:47:04,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:47:04,657 INFO L225 Difference]: With dead ends: 139 [2023-02-16 03:47:04,657 INFO L226 Difference]: Without dead ends: 139 [2023-02-16 03:47:04,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=1525, Unknown=1, NotChecked=80, Total=1806 [2023-02-16 03:47:04,657 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 200 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:47:04,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1144 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1413 Invalid, 0 Unknown, 101 Unchecked, 0.7s Time] [2023-02-16 03:47:04,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-16 03:47:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 94. [2023-02-16 03:47:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 89 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:47:04,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2023-02-16 03:47:04,660 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 41 [2023-02-16 03:47:04,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:47:04,660 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2023-02-16 03:47:04,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 03:47:04,660 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2023-02-16 03:47:04,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 03:47:04,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:47:04,661 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] [2023-02-16 03:47:04,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-16 03:47:04,873 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 [2023-02-16 03:47:04,874 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:47:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:47:04,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1928392465, now seen corresponding path program 1 times [2023-02-16 03:47:04,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:47:04,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573499112] [2023-02-16 03:47:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:04,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:47:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:05,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:47:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:05,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:47:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:05,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:47:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:47:05,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:47:05,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573499112] [2023-02-16 03:47:05,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573499112] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:05,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493398703] [2023-02-16 03:47:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:05,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:05,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:47:05,419 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) [2023-02-16 03:47:05,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:47:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:05,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 03:47:05,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:47:05,786 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 [2023-02-16 03:47:05,831 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1413 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1413))) (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2023-02-16 03:47:05,835 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1414 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1414))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-16 03:47:05,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:05,846 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 24 treesize of output 24 [2023-02-16 03:47:05,879 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 25 treesize of output 13 [2023-02-16 03:47:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-02-16 03:47:05,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:47:05,967 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_36| Int) (v_ArrVal_1418 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_36| v_ArrVal_1418) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (or (<= 1 .cse0) (not (< |v_node_create_~temp~0#1.base_36| |c_#StackHeapBarrier|)) (<= (+ .cse0 1) 0)))) is different from false [2023-02-16 03:47:05,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493398703] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:05,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:47:05,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2023-02-16 03:47:05,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238507380] [2023-02-16 03:47:05,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:47:05,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 03:47:05,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:47:05,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 03:47:05,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=961, Unknown=3, NotChecked=192, Total=1260 [2023-02-16 03:47:05,970 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 29 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 03:47:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:47:06,691 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2023-02-16 03:47:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 03:47:06,691 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 [2023-02-16 03:47:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:47:06,692 INFO L225 Difference]: With dead ends: 97 [2023-02-16 03:47:06,692 INFO L226 Difference]: Without dead ends: 97 [2023-02-16 03:47:06,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=1674, Unknown=5, NotChecked=258, Total=2162 [2023-02-16 03:47:06,693 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 338 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:47:06,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 744 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 807 Invalid, 0 Unknown, 182 Unchecked, 0.4s Time] [2023-02-16 03:47:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-16 03:47:06,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2023-02-16 03:47:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 86 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 03:47:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2023-02-16 03:47:06,695 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 44 [2023-02-16 03:47:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:47:06,695 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2023-02-16 03:47:06,695 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) [2023-02-16 03:47:06,695 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2023-02-16 03:47:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-16 03:47:06,695 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:47:06,695 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] [2023-02-16 03:47:06,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 03:47:06,901 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 [2023-02-16 03:47:06,902 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:47:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:47:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash -710984888, now seen corresponding path program 1 times [2023-02-16 03:47:06,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:47:06,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589616471] [2023-02-16 03:47:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:06,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:47:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:07,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:47:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:07,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:47:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:07,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:47:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:47:07,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:47:07,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589616471] [2023-02-16 03:47:07,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589616471] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:07,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041138628] [2023-02-16 03:47:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:07,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:07,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:47:07,865 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) [2023-02-16 03:47:07,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:47:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:08,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-16 03:47:08,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:47:08,074 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 [2023-02-16 03:47:08,252 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:47:08,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:47:08,341 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 [2023-02-16 03:47:08,452 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:47:08,452 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 37 treesize of output 36 [2023-02-16 03:47:08,588 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:47:08,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 22 [2023-02-16 03:47:08,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-16 03:47:08,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-16 03:47:08,716 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)) (exists ((v_ArrVal_1582 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1582))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1581 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1581))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-16 03:47:08,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:08,755 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 03:47:08,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 51 [2023-02-16 03:47:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:08,760 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 51 treesize of output 49 [2023-02-16 03:47:08,787 INFO L321 Elim1Store]: treesize reduction 84, result has 37.8 percent of original size [2023-02-16 03:47:08,787 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 38 treesize of output 65 [2023-02-16 03:47:08,905 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 68 treesize of output 48 [2023-02-16 03:47:09,091 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:47:09,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 33 [2023-02-16 03:47:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-16 03:47:09,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:47:09,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041138628] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:09,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:47:09,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2023-02-16 03:47:09,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551464839] [2023-02-16 03:47:09,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:47:09,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-16 03:47:09,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:47:09,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-16 03:47:09,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2083, Unknown=2, NotChecked=92, Total=2352 [2023-02-16 03:47:09,391 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 48 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 41 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:47:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:47:10,912 INFO L93 Difference]: Finished difference Result 193 states and 212 transitions. [2023-02-16 03:47:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 03:47:10,913 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 41 states have internal predecessors, (76), 6 states have call successors, (6), 4 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 46 [2023-02-16 03:47:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:47:10,913 INFO L225 Difference]: With dead ends: 193 [2023-02-16 03:47:10,913 INFO L226 Difference]: Without dead ends: 193 [2023-02-16 03:47:10,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=412, Invalid=3494, Unknown=4, NotChecked=122, Total=4032 [2023-02-16 03:47:10,915 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 610 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 26 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-16 03:47:10,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1058 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1583 Invalid, 3 Unknown, 138 Unchecked, 0.8s Time] [2023-02-16 03:47:10,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-16 03:47:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 111. [2023-02-16 03:47:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 104 states have internal predecessors, (114), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 03:47:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2023-02-16 03:47:10,931 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 46 [2023-02-16 03:47:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:47:10,932 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2023-02-16 03:47:10,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 41 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:47:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2023-02-16 03:47:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-16 03:47:10,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:47:10,933 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] [2023-02-16 03:47:10,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 03:47:11,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-16 03:47:11,138 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:47:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:47:11,139 INFO L85 PathProgramCache]: Analyzing trace with hash -710984887, now seen corresponding path program 1 times [2023-02-16 03:47:11,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:47:11,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834489717] [2023-02-16 03:47:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:11,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:47:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:12,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:47:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:12,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:47:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:12,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:47:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:47:12,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:47:12,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834489717] [2023-02-16 03:47:12,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834489717] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:12,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127058676] [2023-02-16 03:47:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:12,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:12,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:47:12,635 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:47:12,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:47:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 122 conjunts are in the unsatisfiable core [2023-02-16 03:47:12,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:47:12,851 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 [2023-02-16 03:47:12,855 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 [2023-02-16 03:47:13,203 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:47:13,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:47:13,214 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 [2023-02-16 03:47:13,315 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 [2023-02-16 03:47:13,321 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 [2023-02-16 03:47:13,476 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:47:13,476 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 56 treesize of output 51 [2023-02-16 03:47:13,487 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 18 treesize of output 20 [2023-02-16 03:47:13,649 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:47:13,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 38 [2023-02-16 03:47:13,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 10 [2023-02-16 03:47:13,779 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_1760 (Array Int Int)) (v_ArrVal_1759 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1760)) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1759)) (= (select |c_old(#valid)| |node_create_~temp~0#1.base|) 0) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2023-02-16 03:47:13,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:13,831 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 03:47:13,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 75 [2023-02-16 03:47:13,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:13,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:13,842 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-16 03:47:13,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 80 [2023-02-16 03:47:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:13,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-02-16 03:47:13,863 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-02-16 03:47:13,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2023-02-16 03:47:14,108 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:47:14,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 42 [2023-02-16 03:47:14,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2023-02-16 03:47:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-16 03:47:14,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:47:14,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127058676] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:14,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:47:14,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 47 [2023-02-16 03:47:14,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076704793] [2023-02-16 03:47:14,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:47:14,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-16 03:47:14,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:47:14,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-16 03:47:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2678, Unknown=1, NotChecked=104, Total=2970 [2023-02-16 03:47:14,560 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand has 48 states, 43 states have (on average 1.744186046511628) internal successors, (75), 41 states have internal predecessors, (75), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:47:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:47:17,353 INFO L93 Difference]: Finished difference Result 177 states and 195 transitions. [2023-02-16 03:47:17,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 03:47:17,353 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.744186046511628) internal successors, (75), 41 states have internal predecessors, (75), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2023-02-16 03:47:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:47:17,354 INFO L225 Difference]: With dead ends: 177 [2023-02-16 03:47:17,354 INFO L226 Difference]: Without dead ends: 177 [2023-02-16 03:47:17,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=433, Invalid=4540, Unknown=1, NotChecked=138, Total=5112 [2023-02-16 03:47:17,356 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 460 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 2622 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:47:17,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 1987 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2622 Invalid, 0 Unknown, 160 Unchecked, 1.4s Time] [2023-02-16 03:47:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-16 03:47:17,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 110. [2023-02-16 03:47:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 103 states have internal predecessors, (112), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 03:47:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2023-02-16 03:47:17,358 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 46 [2023-02-16 03:47:17,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:47:17,358 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2023-02-16 03:47:17,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.744186046511628) internal successors, (75), 41 states have internal predecessors, (75), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:47:17,359 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2023-02-16 03:47:17,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-16 03:47:17,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:47:17,359 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:47:17,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 03:47:17,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-16 03:47:17,571 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:47:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:47:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash 555333, now seen corresponding path program 2 times [2023-02-16 03:47:17,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:47:17,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467230089] [2023-02-16 03:47:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:17,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:47:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:18,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:47:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:18,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:47:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:18,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:47:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:47:18,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:47:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467230089] [2023-02-16 03:47:18,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467230089] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051124116] [2023-02-16 03:47:18,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:47:18,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:18,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:47:18,719 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:47:18,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:47:18,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:47:18,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:47:18,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 124 conjunts are in the unsatisfiable core [2023-02-16 03:47:18,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:47:19,022 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 [2023-02-16 03:47:19,265 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:47:19,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:47:19,381 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 [2023-02-16 03:47:19,392 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 [2023-02-16 03:47:19,529 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-16 03:47:19,530 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 56 treesize of output 38 [2023-02-16 03:47:19,538 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 18 treesize of output 20 [2023-02-16 03:47:19,742 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2023-02-16 03:47:19,742 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 69 treesize of output 35 [2023-02-16 03:47:19,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-16 03:47:19,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-02-16 03:47:19,860 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_1938 (Array Int Int)) (v_ArrVal_1937 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |node_create_~temp~0#1.base|) 0) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1937)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1938)))) is different from true [2023-02-16 03:47:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:19,901 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-16 03:47:19,901 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 75 treesize of output 69 [2023-02-16 03:47:19,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:19,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:19,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:19,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2023-02-16 03:47:19,926 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-16 03:47:19,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-02-16 03:47:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:20,210 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-16 03:47:20,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 30 [2023-02-16 03:47:20,372 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:47:20,389 INFO L321 Elim1Store]: treesize reduction 65, result has 14.5 percent of original size [2023-02-16 03:47:20,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 35 [2023-02-16 03:47:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-16 03:47:20,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:47:20,585 INFO L321 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2023-02-16 03:47:20,585 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 24 treesize of output 23 [2023-02-16 03:47:20,745 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1945 (Array Int Int)) (|v_node_create_~temp~0#1.base_45| Int) (v_ArrVal_1946 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_45| v_ArrVal_1946))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (or (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_45| v_ArrVal_1945))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|))) (= (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)) .cse1))) (not (= 0 (select |c_#valid| |v_node_create_~temp~0#1.base_45|))) (not (< |v_node_create_~temp~0#1.base_45| |c_#StackHeapBarrier|)) (not (<= 0 .cse2)))))) is different from false [2023-02-16 03:47:20,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051124116] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:20,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:47:20,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2023-02-16 03:47:20,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088898032] [2023-02-16 03:47:20,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:47:20,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-16 03:47:20,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:47:20,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-16 03:47:20,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3125, Unknown=2, NotChecked=226, Total=3540 [2023-02-16 03:47:20,749 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 53 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 46 states have internal predecessors, (87), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:47:24,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:47:24,020 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2023-02-16 03:47:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-16 03:47:24,021 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 46 states have internal predecessors, (87), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2023-02-16 03:47:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:47:24,028 INFO L225 Difference]: With dead ends: 138 [2023-02-16 03:47:24,028 INFO L226 Difference]: Without dead ends: 138 [2023-02-16 03:47:24,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=509, Invalid=5047, Unknown=2, NotChecked=294, Total=5852 [2023-02-16 03:47:24,030 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 394 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:47:24,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 1376 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2073 Invalid, 0 Unknown, 110 Unchecked, 1.0s Time] [2023-02-16 03:47:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-16 03:47:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2023-02-16 03:47:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 88 states have (on average 1.3068181818181819) internal successors, (115), 106 states have internal predecessors, (115), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 03:47:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2023-02-16 03:47:24,033 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 51 [2023-02-16 03:47:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:47:24,034 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2023-02-16 03:47:24,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 46 states have internal predecessors, (87), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:47:24,034 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2023-02-16 03:47:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 03:47:24,034 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:47:24,035 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, 1, 1, 1, 1, 1, 1] [2023-02-16 03:47:24,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 03:47:24,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-16 03:47:24,241 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:47:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:47:24,241 INFO L85 PathProgramCache]: Analyzing trace with hash 430095050, now seen corresponding path program 1 times [2023-02-16 03:47:24,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:47:24,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084379592] [2023-02-16 03:47:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:24,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:47:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:24,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:47:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:24,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:47:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:24,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:47:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:47:24,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:47:24,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084379592] [2023-02-16 03:47:24,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084379592] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:24,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267375877] [2023-02-16 03:47:24,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:24,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:24,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:47:24,921 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:47:24,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 03:47:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:25,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-16 03:47:25,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:47:25,207 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 [2023-02-16 03:47:25,390 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 [2023-02-16 03:47:25,432 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-02-16 03:47:25,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-02-16 03:47:25,480 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-16 03:47:25,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2023-02-16 03:47:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 03:47:25,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:47:25,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267375877] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:47:25,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:47:25,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [21] total 29 [2023-02-16 03:47:25,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807975742] [2023-02-16 03:47:25,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:47:25,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:47:25,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:47:25,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:47:25,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2023-02-16 03:47:25,488 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 03:47:25,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:47:25,703 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2023-02-16 03:47:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 03:47:25,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 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 52 [2023-02-16 03:47:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:47:25,704 INFO L225 Difference]: With dead ends: 135 [2023-02-16 03:47:25,704 INFO L226 Difference]: Without dead ends: 135 [2023-02-16 03:47:25,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 03:47:25,705 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 206 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:47:25,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 355 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:47:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-16 03:47:25,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 114. [2023-02-16 03:47:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 107 states have internal predecessors, (117), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 03:47:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2023-02-16 03:47:25,708 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 52 [2023-02-16 03:47:25,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:47:25,708 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2023-02-16 03:47:25,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 03:47:25,709 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2023-02-16 03:47:25,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 03:47:25,709 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:47:25,709 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, 1, 1, 1, 1, 1, 1] [2023-02-16 03:47:25,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 03:47:25,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-16 03:47:25,915 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:47:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:47:25,915 INFO L85 PathProgramCache]: Analyzing trace with hash 430095051, now seen corresponding path program 1 times [2023-02-16 03:47:25,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:47:25,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665854159] [2023-02-16 03:47:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:25,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:47:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:26,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:47:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:26,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:47:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:26,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:47:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:47:26,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:47:26,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665854159] [2023-02-16 03:47:26,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665854159] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:26,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143552079] [2023-02-16 03:47:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:26,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:26,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:47:26,576 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:47:26,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 03:47:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:26,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-16 03:47:26,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:47:26,803 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 [2023-02-16 03:47:26,953 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 [2023-02-16 03:47:26,958 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 [2023-02-16 03:47:27,000 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-02-16 03:47:27,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-02-16 03:47:27,011 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-02-16 03:47:27,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-02-16 03:47:27,078 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 [2023-02-16 03:47:27,080 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 [2023-02-16 03:47:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 03:47:27,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:47:27,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143552079] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:47:27,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:47:27,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [21] total 31 [2023-02-16 03:47:27,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446776270] [2023-02-16 03:47:27,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:47:27,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:47:27,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:47:27,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:47:27,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2023-02-16 03:47:27,123 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 03:47:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:47:27,319 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2023-02-16 03:47:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 03:47:27,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 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 52 [2023-02-16 03:47:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:47:27,320 INFO L225 Difference]: With dead ends: 119 [2023-02-16 03:47:27,320 INFO L226 Difference]: Without dead ends: 119 [2023-02-16 03:47:27,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2023-02-16 03:47:27,320 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 179 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:47:27,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 337 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:47:27,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-16 03:47:27,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2023-02-16 03:47:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 91 states have (on average 1.3076923076923077) internal successors, (119), 109 states have internal predecessors, (119), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 03:47:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2023-02-16 03:47:27,324 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 52 [2023-02-16 03:47:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:47:27,324 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2023-02-16 03:47:27,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 03:47:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2023-02-16 03:47:27,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-16 03:47:27,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:47:27,325 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:47:27,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 03:47:27,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:27,531 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:47:27,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:47:27,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1004484877, now seen corresponding path program 1 times [2023-02-16 03:47:27,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:47:27,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151504285] [2023-02-16 03:47:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:27,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:47:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:28,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:47:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:28,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:47:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:28,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:47:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:47:28,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:47:28,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151504285] [2023-02-16 03:47:28,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151504285] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:28,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279446360] [2023-02-16 03:47:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:28,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:28,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:47:28,563 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:47:28,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 03:47:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 91 conjunts are in the unsatisfiable core [2023-02-16 03:47:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:47:28,807 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 [2023-02-16 03:47:28,929 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:47:28,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:47:28,991 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 [2023-02-16 03:47:29,065 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:47:29,065 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 29 [2023-02-16 03:47:29,186 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:47:29,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 22 [2023-02-16 03:47:29,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-02-16 03:47:29,281 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2539 (Array Int Int)) (v_ArrVal_2538 (Array Int Int)) (|node_create_~temp~0#1.base| Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2538)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2539)) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |node_create_~temp~0#1.base|) 0))) is different from true [2023-02-16 03:47:29,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:29,313 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 03:47:29,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 51 [2023-02-16 03:47:29,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:29,317 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 51 treesize of output 49 [2023-02-16 03:47:29,329 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-02-16 03:47:29,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2023-02-16 03:47:29,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-02-16 03:47:29,486 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:47:29,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2023-02-16 03:47:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-16 03:47:29,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:47:29,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279446360] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:29,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:47:29,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 46 [2023-02-16 03:47:29,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331103805] [2023-02-16 03:47:29,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:47:29,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-16 03:47:29,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:47:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-16 03:47:29,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2280, Unknown=1, NotChecked=96, Total=2550 [2023-02-16 03:47:29,670 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand has 46 states, 42 states have (on average 1.880952380952381) internal successors, (79), 39 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:47:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:47:30,990 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2023-02-16 03:47:30,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-16 03:47:30,991 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 1.880952380952381) internal successors, (79), 39 states have internal predecessors, (79), 6 states have call successors, (6), 4 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 54 [2023-02-16 03:47:30,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:47:30,991 INFO L225 Difference]: With dead ends: 121 [2023-02-16 03:47:30,991 INFO L226 Difference]: Without dead ends: 121 [2023-02-16 03:47:30,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=363, Invalid=3300, Unknown=1, NotChecked=118, Total=3782 [2023-02-16 03:47:30,993 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 273 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:47:30,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 1479 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1630 Invalid, 0 Unknown, 114 Unchecked, 0.7s Time] [2023-02-16 03:47:30,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-16 03:47:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2023-02-16 03:47:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 109 states have internal predecessors, (118), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 03:47:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2023-02-16 03:47:30,996 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 54 [2023-02-16 03:47:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:47:30,996 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2023-02-16 03:47:30,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 1.880952380952381) internal successors, (79), 39 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:47:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2023-02-16 03:47:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-16 03:47:30,997 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:47:30,997 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:47:31,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 03:47:31,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-02-16 03:47:31,203 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:47:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:47:31,203 INFO L85 PathProgramCache]: Analyzing trace with hash 749733786, now seen corresponding path program 3 times [2023-02-16 03:47:31,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:47:31,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043151358] [2023-02-16 03:47:31,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:31,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:47:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:31,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:47:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:31,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:47:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:31,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:47:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:31,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-16 03:47:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-16 03:47:31,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:47:31,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043151358] [2023-02-16 03:47:31,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043151358] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:31,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160316963] [2023-02-16 03:47:31,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:47:31,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:31,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:47:31,290 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:47:31,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 03:47:31,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 03:47:31,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:47:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 03:47:31,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:47:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 03:47:31,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:47:31,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160316963] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:47:31,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:47:31,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-02-16 03:47:31,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876980800] [2023-02-16 03:47:31,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:47:31,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:47:31,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:47:31,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:47:31,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:47:31,642 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 03:47:31,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:47:31,653 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2023-02-16 03:47:31,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:47:31,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2023-02-16 03:47:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:47:31,659 INFO L225 Difference]: With dead ends: 84 [2023-02-16 03:47:31,659 INFO L226 Difference]: Without dead ends: 84 [2023-02-16 03:47:31,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:47:31,660 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 130 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:47:31,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 94 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:47:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-16 03:47:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-02-16 03:47:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 79 states have internal predecessors, (84), 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) [2023-02-16 03:47:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2023-02-16 03:47:31,662 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 58 [2023-02-16 03:47:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:47:31,662 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2023-02-16 03:47:31,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 03:47:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2023-02-16 03:47:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 03:47:31,663 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:47:31,663 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:47:31,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-16 03:47:31,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:31,869 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:47:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:47:31,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1017304566, now seen corresponding path program 1 times [2023-02-16 03:47:31,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:47:31,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767652648] [2023-02-16 03:47:31,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:31,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:47:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:33,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:47:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:33,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:47:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:33,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:47:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:47:33,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:47:33,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767652648] [2023-02-16 03:47:33,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767652648] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:47:33,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183587996] [2023-02-16 03:47:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:47:33,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:47:33,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:47:33,763 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:47:33,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 03:47:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:47:33,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 148 conjunts are in the unsatisfiable core [2023-02-16 03:47:34,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:47:34,004 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 [2023-02-16 03:47:34,033 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 [2023-02-16 03:47:34,122 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-16 03:47:34,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-16 03:47:34,212 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 11 treesize of output 7 [2023-02-16 03:47:34,320 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-16 03:47:34,321 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 22 treesize of output 33 [2023-02-16 03:47:34,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2023-02-16 03:47:34,590 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 03:47:34,590 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 42 [2023-02-16 03:47:34,776 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 03:47:34,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 26 [2023-02-16 03:47:34,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-02-16 03:47:34,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-16 03:47:34,955 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 13 treesize of output 9 [2023-02-16 03:47:35,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:35,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-16 03:47:35,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:35,127 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 03:47:35,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 49 [2023-02-16 03:47:35,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:35,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:35,142 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-16 03:47:35,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-02-16 03:47:35,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-16 03:47:35,740 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-02-16 03:47:35,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 33 [2023-02-16 03:47:35,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:35,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-16 03:47:36,082 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 [2023-02-16 03:47:36,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2023-02-16 03:47:36,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:47:36,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-16 03:47:36,186 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 37 treesize of output 35 [2023-02-16 03:47:36,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-16 03:47:36,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-02-16 03:47:36,294 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 30 treesize of output 18 [2023-02-16 03:47:36,297 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 [2023-02-16 03:47:36,439 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:47:36,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:47:36,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2023-02-16 03:47:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:47:36,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:47:36,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:47:36,750 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2023-02-16 03:47:36,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:47:36,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 87 [2023-02-16 03:47:36,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:47:36,786 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 64 [2023-02-16 03:47:36,790 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 28 treesize of output 26 [2023-02-16 03:47:36,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:47:36,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 109 [2023-02-16 03:47:36,805 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 94 treesize of output 90 [2023-02-16 03:47:50,528 INFO L321 Elim1Store]: treesize reduction 32, result has 61.4 percent of original size [2023-02-16 03:47:50,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 156 treesize of output 190 [2023-02-16 03:47:50,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:47:50,553 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 932 treesize of output 932 [2023-02-16 03:47:50,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:47:50,566 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 906 treesize of output 902 [2023-02-16 03:47:50,573 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 882 treesize of output 850 [2023-02-16 03:47:50,579 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 850 treesize of output 834 [2023-02-16 03:47:50,586 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 834 treesize of output 826 [2023-02-16 03:47:50,593 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 826 treesize of output 810 [2023-02-16 03:48:06,174 WARN L233 SmtUtils]: Spent 14.48s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 03:48:06,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183587996] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:48:06,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:48:06,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2023-02-16 03:48:06,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895817822] [2023-02-16 03:48:06,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:48:06,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-16 03:48:06,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:48:06,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-16 03:48:06,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5687, Unknown=64, NotChecked=0, Total=6006 [2023-02-16 03:48:06,177 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 66 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 57 states have internal predecessors, (104), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:48:10,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:48:10,338 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2023-02-16 03:48:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-16 03:48:10,341 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 57 states have internal predecessors, (104), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2023-02-16 03:48:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:48:10,341 INFO L225 Difference]: With dead ends: 103 [2023-02-16 03:48:10,341 INFO L226 Difference]: Without dead ends: 103 [2023-02-16 03:48:10,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=631, Invalid=8810, Unknown=65, NotChecked=0, Total=9506 [2023-02-16 03:48:10,344 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 422 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:48:10,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1300 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-16 03:48:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-16 03:48:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2023-02-16 03:48:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 79 states have internal predecessors, (83), 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) [2023-02-16 03:48:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2023-02-16 03:48:10,346 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 59 [2023-02-16 03:48:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:48:10,346 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2023-02-16 03:48:10,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 57 states have internal predecessors, (104), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 03:48:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2023-02-16 03:48:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-16 03:48:10,347 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:48:10,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:48:10,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-16 03:48:10,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:48:10,548 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-02-16 03:48:10,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:48:10,548 INFO L85 PathProgramCache]: Analyzing trace with hash 491499798, now seen corresponding path program 1 times [2023-02-16 03:48:10,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:48:10,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061963028] [2023-02-16 03:48:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:10,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:48:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:11,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 03:48:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:11,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:48:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:11,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 03:48:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 03:48:11,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:48:11,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061963028] [2023-02-16 03:48:11,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061963028] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:48:11,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366084928] [2023-02-16 03:48:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:48:11,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:48:11,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:48:11,726 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:48:11,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 03:48:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:48:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 112 conjunts are in the unsatisfiable core [2023-02-16 03:48:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:48:12,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-16 03:48:12,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:12,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-16 03:48:12,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:12,850 INFO L321 Elim1Store]: treesize reduction 41, result has 35.9 percent of original size [2023-02-16 03:48:12,850 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2023-02-16 03:48:12,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:12,857 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 48 treesize of output 35 [2023-02-16 03:48:12,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:12,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 51 treesize of output 34 [2023-02-16 03:48:12,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:12,960 INFO L321 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2023-02-16 03:48:12,960 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 43 [2023-02-16 03:48:13,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:13,060 INFO L321 Elim1Store]: treesize reduction 88, result has 36.2 percent of original size [2023-02-16 03:48:13,061 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 94 treesize of output 109 [2023-02-16 03:48:13,083 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2023-02-16 03:48:13,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 163 treesize of output 108 [2023-02-16 03:48:14,311 INFO L321 Elim1Store]: treesize reduction 80, result has 49.0 percent of original size [2023-02-16 03:48:14,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 207 treesize of output 198 [2023-02-16 03:48:14,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:48:14,452 INFO L321 Elim1Store]: treesize reduction 44, result has 78.5 percent of original size [2023-02-16 03:48:14,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 18 case distinctions, treesize of input 179 treesize of output 256 [2023-02-16 03:48:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:48:20,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:48:24,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:48:24,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1146 treesize of output 1644 [2023-02-16 03:48:51,543 INFO L321 Elim1Store]: treesize reduction 104, result has 63.1 percent of original size [2023-02-16 03:48:51,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 17668 treesize of output 14413