./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2c_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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/dll2c_insert_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 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-14 02:16:29,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 02:16:29,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 02:16:29,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 02:16:29,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 02:16:29,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 02:16:29,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 02:16:29,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 02:16:29,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 02:16:29,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 02:16:29,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 02:16:29,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 02:16:29,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 02:16:29,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 02:16:29,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 02:16:29,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 02:16:29,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 02:16:29,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 02:16:29,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 02:16:29,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 02:16:29,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 02:16:29,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 02:16:29,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 02:16:29,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 02:16:29,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 02:16:29,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 02:16:29,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 02:16:29,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 02:16:29,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 02:16:29,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 02:16:29,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 02:16:29,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 02:16:29,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 02:16:29,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 02:16:29,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 02:16:29,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 02:16:29,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 02:16:29,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 02:16:29,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 02:16:29,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 02:16:29,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 02:16:29,947 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-14 02:16:29,975 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 02:16:29,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 02:16:29,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 02:16:29,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 02:16:29,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 02:16:29,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 02:16:29,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 02:16:29,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 02:16:29,979 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 02:16:29,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 02:16:29,980 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 02:16:29,980 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-14 02:16:29,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 02:16:29,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 02:16:29,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 02:16:29,981 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-14 02:16:29,981 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-14 02:16:29,981 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-14 02:16:29,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 02:16:29,981 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 02:16:29,982 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 02:16:29,982 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 02:16:29,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 02:16:29,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 02:16:29,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 02:16:29,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 02:16:29,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 02:16:29,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 02:16:29,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 02:16:29,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 02:16:29,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 02:16:29,984 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 02:16:29,984 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 02:16:29,984 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 02:16:29,984 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 [2023-02-14 02:16:30,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 02:16:30,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 02:16:30,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 02:16:30,235 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 02:16:30,235 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 02:16:30,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2023-02-14 02:16:31,401 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 02:16:31,624 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 02:16:31,624 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2023-02-14 02:16:31,636 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6239febe4/4989e4faea2843109ae20c9bfee95af3/FLAG0f174bdca [2023-02-14 02:16:31,652 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6239febe4/4989e4faea2843109ae20c9bfee95af3 [2023-02-14 02:16:31,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 02:16:31,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 02:16:31,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 02:16:31,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 02:16:31,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 02:16:31,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 02:16:31" (1/1) ... [2023-02-14 02:16:31,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6973c183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:31, skipping insertion in model container [2023-02-14 02:16:31,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 02:16:31" (1/1) ... [2023-02-14 02:16:31,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 02:16:31,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 02:16:32,017 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/dll2c_insert_equal.i[24877,24890] [2023-02-14 02:16:32,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 02:16:32,034 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 02:16:32,093 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/dll2c_insert_equal.i[24877,24890] [2023-02-14 02:16:32,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 02:16:32,119 INFO L208 MainTranslator]: Completed translation [2023-02-14 02:16:32,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32 WrapperNode [2023-02-14 02:16:32,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 02:16:32,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 02:16:32,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 02:16:32,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 02:16:32,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32" (1/1) ... [2023-02-14 02:16:32,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32" (1/1) ... [2023-02-14 02:16:32,157 INFO L138 Inliner]: procedures = 127, calls = 53, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 160 [2023-02-14 02:16:32,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 02:16:32,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 02:16:32,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 02:16:32,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 02:16:32,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32" (1/1) ... [2023-02-14 02:16:32,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32" (1/1) ... [2023-02-14 02:16:32,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32" (1/1) ... [2023-02-14 02:16:32,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32" (1/1) ... [2023-02-14 02:16:32,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32" (1/1) ... [2023-02-14 02:16:32,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32" (1/1) ... [2023-02-14 02:16:32,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32" (1/1) ... [2023-02-14 02:16:32,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32" (1/1) ... [2023-02-14 02:16:32,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 02:16:32,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 02:16:32,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 02:16:32,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 02:16:32,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32" (1/1) ... [2023-02-14 02:16:32,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 02:16:32,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:16:32,230 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) [2023-02-14 02:16:32,246 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 [2023-02-14 02:16:32,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 02:16:32,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 02:16:32,276 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-14 02:16:32,277 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-14 02:16:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 02:16:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 02:16:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 02:16:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 02:16:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 02:16:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 02:16:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-14 02:16:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 02:16:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 02:16:32,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 02:16:32,394 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 02:16:32,395 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 02:16:32,764 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 02:16:32,769 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 02:16:32,769 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-14 02:16:32,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 02:16:32 BoogieIcfgContainer [2023-02-14 02:16:32,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 02:16:32,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 02:16:32,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 02:16:32,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 02:16:32,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 02:16:31" (1/3) ... [2023-02-14 02:16:32,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5c69c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 02:16:32, skipping insertion in model container [2023-02-14 02:16:32,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:16:32" (2/3) ... [2023-02-14 02:16:32,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5c69c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 02:16:32, skipping insertion in model container [2023-02-14 02:16:32,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 02:16:32" (3/3) ... [2023-02-14 02:16:32,778 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_insert_equal.i [2023-02-14 02:16:32,790 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 02:16:32,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2023-02-14 02:16:32,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 02:16:32,827 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;@68a054c6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 02:16:32,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-02-14 02:16:32,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 149 states have internal predecessors, (164), 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) [2023-02-14 02:16:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-14 02:16:32,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:32,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-14 02:16:32,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:32,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:32,841 INFO L85 PathProgramCache]: Analyzing trace with hash 896534515, now seen corresponding path program 1 times [2023-02-14 02:16:32,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:32,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747730139] [2023-02-14 02:16:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:32,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 02:16:33,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:33,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747730139] [2023-02-14 02:16:33,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747730139] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:33,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:33,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 02:16:33,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657656635] [2023-02-14 02:16:33,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:33,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 02:16:33,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:33,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 02:16:33,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 02:16:33,155 INFO L87 Difference]: Start difference. First operand has 154 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 149 states have internal predecessors, (164), 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) [2023-02-14 02:16:33,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:33,300 INFO L93 Difference]: Finished difference Result 151 states and 162 transitions. [2023-02-14 02:16:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 02:16:33,303 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 [2023-02-14 02:16:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:33,310 INFO L225 Difference]: With dead ends: 151 [2023-02-14 02:16:33,311 INFO L226 Difference]: Without dead ends: 148 [2023-02-14 02:16:33,312 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 [2023-02-14 02:16:33,315 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 10 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:33,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 240 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 02:16:33,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-14 02:16:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-02-14 02:16:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 75 states have (on average 2.026666666666667) internal successors, (152), 143 states have internal predecessors, (152), 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) [2023-02-14 02:16:33,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2023-02-14 02:16:33,377 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 6 [2023-02-14 02:16:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:33,379 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2023-02-14 02:16:33,380 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) [2023-02-14 02:16:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2023-02-14 02:16:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-14 02:16:33,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:33,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-14 02:16:33,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 02:16:33,382 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:33,382 INFO L85 PathProgramCache]: Analyzing trace with hash 896534514, now seen corresponding path program 1 times [2023-02-14 02:16:33,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:33,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165879861] [2023-02-14 02:16:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:33,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 02:16:33,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:33,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165879861] [2023-02-14 02:16:33,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165879861] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:33,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:33,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 02:16:33,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628202272] [2023-02-14 02:16:33,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:33,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 02:16:33,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:33,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 02:16:33,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 02:16:33,480 INFO L87 Difference]: Start difference. First operand 148 states and 158 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) [2023-02-14 02:16:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:33,601 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2023-02-14 02:16:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 02:16:33,602 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 [2023-02-14 02:16:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:33,607 INFO L225 Difference]: With dead ends: 145 [2023-02-14 02:16:33,608 INFO L226 Difference]: Without dead ends: 145 [2023-02-14 02:16:33,612 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 [2023-02-14 02:16:33,616 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 5 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:33,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 229 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 02:16:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-14 02:16:33,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-02-14 02:16:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 140 states have internal predecessors, (149), 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) [2023-02-14 02:16:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2023-02-14 02:16:33,631 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 6 [2023-02-14 02:16:33,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:33,631 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2023-02-14 02:16:33,631 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) [2023-02-14 02:16:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2023-02-14 02:16:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 02:16:33,632 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:33,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 02:16:33,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 02:16:33,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:33,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:33,634 INFO L85 PathProgramCache]: Analyzing trace with hash 976905444, now seen corresponding path program 1 times [2023-02-14 02:16:33,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:33,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330713020] [2023-02-14 02:16:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:33,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:33,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 02:16:33,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:33,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330713020] [2023-02-14 02:16:33,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330713020] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:33,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:33,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 02:16:33,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336257912] [2023-02-14 02:16:33,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:33,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 02:16:33,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:33,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 02:16:33,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 02:16:33,782 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-02-14 02:16:33,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:33,917 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2023-02-14 02:16:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 02:16:33,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 14 [2023-02-14 02:16:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:33,919 INFO L225 Difference]: With dead ends: 156 [2023-02-14 02:16:33,919 INFO L226 Difference]: Without dead ends: 156 [2023-02-14 02:16:33,919 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 [2023-02-14 02:16:33,920 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 10 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:33,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 352 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 02:16:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-14 02:16:33,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2023-02-14 02:16:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 141 states have internal predecessors, (150), 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) [2023-02-14 02:16:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2023-02-14 02:16:33,939 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 14 [2023-02-14 02:16:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:33,939 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2023-02-14 02:16:33,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-02-14 02:16:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2023-02-14 02:16:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 02:16:33,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:33,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 02:16:33,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 02:16:33,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:33,941 INFO L85 PathProgramCache]: Analyzing trace with hash 302098592, now seen corresponding path program 1 times [2023-02-14 02:16:33,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:33,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689852215] [2023-02-14 02:16:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:33,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:34,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:34,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 02:16:34,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:34,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689852215] [2023-02-14 02:16:34,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689852215] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:34,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:34,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 02:16:34,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987893976] [2023-02-14 02:16:34,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:34,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 02:16:34,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:34,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 02:16:34,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 02:16:34,136 INFO L87 Difference]: Start difference. First operand 146 states and 156 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) [2023-02-14 02:16:34,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:34,345 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2023-02-14 02:16:34,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 02:16:34,346 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 24 [2023-02-14 02:16:34,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:34,348 INFO L225 Difference]: With dead ends: 146 [2023-02-14 02:16:34,348 INFO L226 Difference]: Without dead ends: 146 [2023-02-14 02:16:34,348 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 [2023-02-14 02:16:34,349 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 21 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:34,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 484 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 02:16:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-14 02:16:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2023-02-14 02:16:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 140 states have internal predecessors, (149), 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) [2023-02-14 02:16:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2023-02-14 02:16:34,354 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 24 [2023-02-14 02:16:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:34,354 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2023-02-14 02:16:34,354 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) [2023-02-14 02:16:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2023-02-14 02:16:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 02:16:34,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:34,355 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 02:16:34,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 02:16:34,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:34,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:34,356 INFO L85 PathProgramCache]: Analyzing trace with hash 302098593, now seen corresponding path program 1 times [2023-02-14 02:16:34,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:34,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031214594] [2023-02-14 02:16:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:34,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:34,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:34,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 02:16:34,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:34,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031214594] [2023-02-14 02:16:34,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031214594] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:34,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:34,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 02:16:34,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771189055] [2023-02-14 02:16:34,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:34,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 02:16:34,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:34,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 02:16:34,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 02:16:34,542 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2023-02-14 02:16:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:34,850 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2023-02-14 02:16:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 02:16:34,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 24 [2023-02-14 02:16:34,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:34,851 INFO L225 Difference]: With dead ends: 145 [2023-02-14 02:16:34,851 INFO L226 Difference]: Without dead ends: 145 [2023-02-14 02:16:34,852 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 [2023-02-14 02:16:34,852 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 19 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:34,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 508 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 02:16:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-14 02:16:34,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2023-02-14 02:16:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 76 states have (on average 1.9473684210526316) internal successors, (148), 139 states have internal predecessors, (148), 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) [2023-02-14 02:16:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2023-02-14 02:16:34,859 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 24 [2023-02-14 02:16:34,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:34,859 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2023-02-14 02:16:34,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2023-02-14 02:16:34,859 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2023-02-14 02:16:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 02:16:34,860 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:34,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 02:16:34,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 02:16:34,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:34,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1741029503, now seen corresponding path program 1 times [2023-02-14 02:16:34,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:34,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082794695] [2023-02-14 02:16:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:34,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:35,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:35,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 02:16:35,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:35,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082794695] [2023-02-14 02:16:35,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082794695] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:35,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169836470] [2023-02-14 02:16:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:35,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:16:35,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:16:35,158 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) [2023-02-14 02:16:35,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 02:16:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:35,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 02:16:35,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:16:35,309 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 [2023-02-14 02:16:35,379 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_352 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_352))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-14 02:16:35,442 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 02:16:35,442 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 [2023-02-14 02:16:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-02-14 02:16:35,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:16:35,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169836470] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:35,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 02:16:35,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-02-14 02:16:35,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075937368] [2023-02-14 02:16:35,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 02:16:35,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 02:16:35,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 02:16:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-02-14 02:16:35,518 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 02:16:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:35,816 INFO L93 Difference]: Finished difference Result 169 states and 182 transitions. [2023-02-14 02:16:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 02:16:35,816 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-02-14 02:16:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:35,817 INFO L225 Difference]: With dead ends: 169 [2023-02-14 02:16:35,817 INFO L226 Difference]: Without dead ends: 169 [2023-02-14 02:16:35,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-02-14 02:16:35,818 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 124 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:35,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 457 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 495 Invalid, 0 Unknown, 175 Unchecked, 0.2s Time] [2023-02-14 02:16:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-14 02:16:35,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2023-02-14 02:16:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 80 states have (on average 1.925) internal successors, (154), 143 states have internal predecessors, (154), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 02:16:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2023-02-14 02:16:35,822 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 26 [2023-02-14 02:16:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:35,822 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2023-02-14 02:16:35,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 02:16:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2023-02-14 02:16:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 02:16:35,823 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:35,823 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 02:16:35,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 02:16:36,028 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 [2023-02-14 02:16:36,028 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1741029502, now seen corresponding path program 1 times [2023-02-14 02:16:36,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:36,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137571832] [2023-02-14 02:16:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:36,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:36,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:36,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 02:16:36,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:36,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137571832] [2023-02-14 02:16:36,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137571832] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:36,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513338497] [2023-02-14 02:16:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:36,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:16:36,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:16:36,400 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) [2023-02-14 02:16:36,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 02:16:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:36,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-14 02:16:36,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:16:36,579 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 [2023-02-14 02:16:36,765 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_493 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_493) |c_#length|)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-14 02:16:36,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:16:36,836 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 14 treesize of output 16 [2023-02-14 02:16:36,842 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 02:16:36,843 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 [2023-02-14 02:16:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-02-14 02:16:36,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:16:41,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513338497] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:41,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 02:16:41,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2023-02-14 02:16:41,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688992615] [2023-02-14 02:16:41,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 02:16:41,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 02:16:41,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:41,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 02:16:41,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=323, Unknown=1, NotChecked=36, Total=420 [2023-02-14 02:16:41,023 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 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) [2023-02-14 02:16:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:41,646 INFO L93 Difference]: Finished difference Result 151 states and 163 transitions. [2023-02-14 02:16:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 02:16:41,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 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 26 [2023-02-14 02:16:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:41,648 INFO L225 Difference]: With dead ends: 151 [2023-02-14 02:16:41,648 INFO L226 Difference]: Without dead ends: 151 [2023-02-14 02:16:41,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=79, Invalid=386, Unknown=1, NotChecked=40, Total=506 [2023-02-14 02:16:41,648 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 7 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:41,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 940 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1183 Invalid, 0 Unknown, 156 Unchecked, 0.5s Time] [2023-02-14 02:16:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-02-14 02:16:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2023-02-14 02:16:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 80 states have (on average 1.9125) internal successors, (153), 143 states have internal predecessors, (153), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 02:16:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2023-02-14 02:16:41,652 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 26 [2023-02-14 02:16:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:41,652 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2023-02-14 02:16:41,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 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) [2023-02-14 02:16:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2023-02-14 02:16:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 02:16:41,653 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:41,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 02:16:41,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 02:16:41,853 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 [2023-02-14 02:16:41,854 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:41,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1908047191, now seen corresponding path program 1 times [2023-02-14 02:16:41,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:41,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235351842] [2023-02-14 02:16:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:41,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:41,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:41,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 02:16:41,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:41,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235351842] [2023-02-14 02:16:41,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235351842] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:41,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580024482] [2023-02-14 02:16:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:41,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:16:41,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:16:41,987 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) [2023-02-14 02:16:41,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 02:16:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:42,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 02:16:42,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:16:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 02:16:42,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:16:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 02:16:42,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580024482] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 02:16:42,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 02:16:42,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-02-14 02:16:42,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239455475] [2023-02-14 02:16:42,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 02:16:42,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 02:16:42,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:42,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 02:16:42,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 02:16:42,132 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 02:16:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:42,255 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2023-02-14 02:16:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 02:16:42,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-02-14 02:16:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:42,257 INFO L225 Difference]: With dead ends: 150 [2023-02-14 02:16:42,257 INFO L226 Difference]: Without dead ends: 150 [2023-02-14 02:16:42,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-14 02:16:42,257 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 4 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:42,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 750 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 02:16:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-14 02:16:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2023-02-14 02:16:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 80 states have (on average 1.9) internal successors, (152), 143 states have internal predecessors, (152), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 02:16:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2023-02-14 02:16:42,260 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 28 [2023-02-14 02:16:42,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:42,260 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2023-02-14 02:16:42,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 02:16:42,260 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2023-02-14 02:16:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 02:16:42,261 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:42,261 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 02:16:42,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-14 02:16:42,467 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 [2023-02-14 02:16:42,468 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:42,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:42,469 INFO L85 PathProgramCache]: Analyzing trace with hash -984859886, now seen corresponding path program 1 times [2023-02-14 02:16:42,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:42,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188634266] [2023-02-14 02:16:42,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:42,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:42,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:42,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 02:16:42,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:42,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188634266] [2023-02-14 02:16:42,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188634266] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:42,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343507857] [2023-02-14 02:16:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:42,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:16:42,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:16:42,574 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) [2023-02-14 02:16:42,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 02:16:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:42,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 02:16:42,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:16:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 02:16:42,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:16:42,715 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 02:16:42,716 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 12 treesize of output 11 [2023-02-14 02:16:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 02:16:42,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343507857] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 02:16:42,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 02:16:42,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2023-02-14 02:16:42,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614730374] [2023-02-14 02:16:42,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 02:16:42,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 02:16:42,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:42,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 02:16:42,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-14 02:16:42,733 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 02:16:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:42,914 INFO L93 Difference]: Finished difference Result 154 states and 167 transitions. [2023-02-14 02:16:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 02:16:42,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-02-14 02:16:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:42,915 INFO L225 Difference]: With dead ends: 154 [2023-02-14 02:16:42,916 INFO L226 Difference]: Without dead ends: 154 [2023-02-14 02:16:42,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 02:16:42,916 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 12 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:42,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 351 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 02:16:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-02-14 02:16:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2023-02-14 02:16:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 83 states have (on average 1.891566265060241) internal successors, (157), 146 states have internal predecessors, (157), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 02:16:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2023-02-14 02:16:42,921 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 29 [2023-02-14 02:16:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:42,921 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2023-02-14 02:16:42,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 02:16:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2023-02-14 02:16:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 02:16:42,922 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:42,923 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 02:16:42,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 02:16:43,129 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 [2023-02-14 02:16:43,129 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash -984859885, now seen corresponding path program 1 times [2023-02-14 02:16:43,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:43,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185846118] [2023-02-14 02:16:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:43,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:43,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:43,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 02:16:43,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:43,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185846118] [2023-02-14 02:16:43,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185846118] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:43,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440636955] [2023-02-14 02:16:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:43,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:16:43,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:16:43,374 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) [2023-02-14 02:16:43,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 02:16:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:43,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 02:16:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:16:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 02:16:43,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:16:43,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 02:16:43,650 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 20 treesize of output 24 [2023-02-14 02:16:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 02:16:43,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440636955] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 02:16:43,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 02:16:43,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-02-14 02:16:43,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502457544] [2023-02-14 02:16:43,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 02:16:43,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 02:16:43,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:43,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 02:16:43,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-02-14 02:16:43,777 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 02:16:44,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:44,068 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2023-02-14 02:16:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 02:16:44,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2023-02-14 02:16:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:44,069 INFO L225 Difference]: With dead ends: 159 [2023-02-14 02:16:44,069 INFO L226 Difference]: Without dead ends: 159 [2023-02-14 02:16:44,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-02-14 02:16:44,070 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 21 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:44,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1422 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 02:16:44,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-14 02:16:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2023-02-14 02:16:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 83 states have (on average 1.8795180722891567) internal successors, (156), 146 states have internal predecessors, (156), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 02:16:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2023-02-14 02:16:44,073 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 29 [2023-02-14 02:16:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:44,073 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2023-02-14 02:16:44,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 02:16:44,074 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2023-02-14 02:16:44,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 02:16:44,074 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:44,074 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 02:16:44,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 02:16:44,279 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,SelfDestructingSolverStorable9 [2023-02-14 02:16:44,279 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:44,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:44,280 INFO L85 PathProgramCache]: Analyzing trace with hash -465885389, now seen corresponding path program 1 times [2023-02-14 02:16:44,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:44,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048906552] [2023-02-14 02:16:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:44,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:44,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:44,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 02:16:44,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:44,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048906552] [2023-02-14 02:16:44,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048906552] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:44,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:44,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 02:16:44,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946210290] [2023-02-14 02:16:44,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:44,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 02:16:44,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:44,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 02:16:44,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 02:16:44,379 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2023-02-14 02:16:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:44,642 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2023-02-14 02:16:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 02:16:44,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 30 [2023-02-14 02:16:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:44,643 INFO L225 Difference]: With dead ends: 152 [2023-02-14 02:16:44,643 INFO L226 Difference]: Without dead ends: 152 [2023-02-14 02:16:44,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-14 02:16:44,644 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 24 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:44,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 542 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 02:16:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-14 02:16:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2023-02-14 02:16:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 83 states have (on average 1.8674698795180722) internal successors, (155), 145 states have internal predecessors, (155), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 02:16:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2023-02-14 02:16:44,647 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 30 [2023-02-14 02:16:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:44,647 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2023-02-14 02:16:44,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2023-02-14 02:16:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2023-02-14 02:16:44,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 02:16:44,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:44,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 02:16:44,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-14 02:16:44,649 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:44,649 INFO L85 PathProgramCache]: Analyzing trace with hash -465885388, now seen corresponding path program 1 times [2023-02-14 02:16:44,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:44,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508690204] [2023-02-14 02:16:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:44,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:44,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:44,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 02:16:44,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508690204] [2023-02-14 02:16:44,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508690204] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:44,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:44,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 02:16:44,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594775621] [2023-02-14 02:16:44,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:44,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 02:16:44,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:44,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 02:16:44,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 02:16:44,854 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2023-02-14 02:16:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:45,143 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2023-02-14 02:16:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 02:16:45,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 30 [2023-02-14 02:16:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:45,144 INFO L225 Difference]: With dead ends: 150 [2023-02-14 02:16:45,144 INFO L226 Difference]: Without dead ends: 150 [2023-02-14 02:16:45,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-14 02:16:45,145 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 20 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:45,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 572 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 02:16:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-14 02:16:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-02-14 02:16:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 83 states have (on average 1.855421686746988) internal successors, (154), 144 states have internal predecessors, (154), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 02:16:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 162 transitions. [2023-02-14 02:16:45,147 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 162 transitions. Word has length 30 [2023-02-14 02:16:45,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:45,147 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 162 transitions. [2023-02-14 02:16:45,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2023-02-14 02:16:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 162 transitions. [2023-02-14 02:16:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 02:16:45,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:45,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 02:16:45,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-14 02:16:45,148 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1959133359, now seen corresponding path program 1 times [2023-02-14 02:16:45,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:45,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565487603] [2023-02-14 02:16:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:45,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:45,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:45,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:45,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 02:16:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 02:16:45,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:45,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565487603] [2023-02-14 02:16:45,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565487603] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:45,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387455092] [2023-02-14 02:16:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:45,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:16:45,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:16:45,275 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) [2023-02-14 02:16:45,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 02:16:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:45,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 02:16:45,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:16:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 02:16:45,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 02:16:45,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387455092] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:45,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 02:16:45,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-02-14 02:16:45,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496401253] [2023-02-14 02:16:45,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:45,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 02:16:45,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:45,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 02:16:45,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 02:16:45,434 INFO L87 Difference]: Start difference. First operand 150 states and 162 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 02:16:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:45,443 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2023-02-14 02:16:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 02:16:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2023-02-14 02:16:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:45,444 INFO L225 Difference]: With dead ends: 138 [2023-02-14 02:16:45,444 INFO L226 Difference]: Without dead ends: 138 [2023-02-14 02:16:45,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 02:16:45,445 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 124 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:45,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 170 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 02:16:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-14 02:16:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-02-14 02:16:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 133 states have internal predecessors, (140), 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) [2023-02-14 02:16:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2023-02-14 02:16:45,449 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 41 [2023-02-14 02:16:45,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:45,449 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2023-02-14 02:16:45,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 02:16:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2023-02-14 02:16:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 02:16:45,453 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:45,453 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:16:45,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 02:16:45,659 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 [2023-02-14 02:16:45,660 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:45,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:45,661 INFO L85 PathProgramCache]: Analyzing trace with hash -930567857, now seen corresponding path program 1 times [2023-02-14 02:16:45,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:45,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125286343] [2023-02-14 02:16:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:45,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:45,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:45,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:45,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:16:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 02:16:46,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:46,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125286343] [2023-02-14 02:16:46,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125286343] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:46,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080228511] [2023-02-14 02:16:46,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:46,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:16:46,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:16:46,003 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) [2023-02-14 02:16:46,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 02:16:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:46,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 02:16:46,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:16:46,194 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 [2023-02-14 02:16:46,201 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 [2023-02-14 02:16:46,214 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1582 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_1582))) is different from true [2023-02-14 02:16:46,223 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1582 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_1582))) is different from true [2023-02-14 02:16:46,238 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 02:16:46,239 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 [2023-02-14 02:16:46,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-02-14 02:16:46,292 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1583 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1583))))) is different from true [2023-02-14 02:16:46,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:16:46,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 02:16:46,405 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 [2023-02-14 02:16:46,419 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:16:46,419 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 [2023-02-14 02:16:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 21 not checked. [2023-02-14 02:16:46,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:16:46,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080228511] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:46,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 02:16:46,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 17 [2023-02-14 02:16:46,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192166632] [2023-02-14 02:16:46,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 02:16:46,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 02:16:46,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:46,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 02:16:46,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=221, Unknown=4, NotChecked=132, Total=420 [2023-02-14 02:16:46,573 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 02:16:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:46,930 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2023-02-14 02:16:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 02:16:46,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2023-02-14 02:16:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:46,931 INFO L225 Difference]: With dead ends: 146 [2023-02-14 02:16:46,931 INFO L226 Difference]: Without dead ends: 146 [2023-02-14 02:16:46,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=304, Unknown=4, NotChecked=156, Total=552 [2023-02-14 02:16:46,931 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 559 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 599 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:46,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 394 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 561 Invalid, 0 Unknown, 599 Unchecked, 0.3s Time] [2023-02-14 02:16:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-14 02:16:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 128. [2023-02-14 02:16:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 76 states have (on average 1.7105263157894737) internal successors, (130), 123 states have internal predecessors, (130), 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) [2023-02-14 02:16:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2023-02-14 02:16:46,934 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 43 [2023-02-14 02:16:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:46,934 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2023-02-14 02:16:46,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 02:16:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2023-02-14 02:16:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 02:16:46,935 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:46,935 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:16:46,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 02:16:47,135 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 [2023-02-14 02:16:47,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:47,136 INFO L85 PathProgramCache]: Analyzing trace with hash -930567856, now seen corresponding path program 1 times [2023-02-14 02:16:47,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:47,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715348402] [2023-02-14 02:16:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:47,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:47,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:47,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:47,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:16:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 02:16:47,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:47,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715348402] [2023-02-14 02:16:47,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715348402] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:47,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330470491] [2023-02-14 02:16:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:47,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:16:47,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:16:47,677 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) [2023-02-14 02:16:47,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 02:16:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 02:16:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:16:47,861 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 [2023-02-14 02:16:47,881 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 [2023-02-14 02:16:47,895 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1822 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1822))))) is different from true [2023-02-14 02:16:47,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:16:47,927 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 [2023-02-14 02:16:47,943 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 [2023-02-14 02:16:47,949 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1823 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1823) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-14 02:16:47,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:16:47,975 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 [2023-02-14 02:16:48,034 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 [2023-02-14 02:16:48,041 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1824 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1824))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-14 02:16:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:16:48,075 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 [2023-02-14 02:16:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 21 not checked. [2023-02-14 02:16:48,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:16:48,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330470491] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:48,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 02:16:48,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2023-02-14 02:16:48,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421800585] [2023-02-14 02:16:48,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 02:16:48,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 02:16:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:48,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 02:16:48,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=251, Unknown=3, NotChecked=102, Total=420 [2023-02-14 02:16:48,161 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 19 states, 15 states have (on average 4.4) internal successors, (66), 17 states have internal predecessors, (66), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 02:16:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:48,520 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2023-02-14 02:16:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 02:16:48,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 4.4) internal successors, (66), 17 states have internal predecessors, (66), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2023-02-14 02:16:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:48,521 INFO L225 Difference]: With dead ends: 136 [2023-02-14 02:16:48,521 INFO L226 Difference]: Without dead ends: 136 [2023-02-14 02:16:48,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=335, Unknown=3, NotChecked=120, Total=552 [2023-02-14 02:16:48,522 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 519 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:48,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 379 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 515 Invalid, 0 Unknown, 357 Unchecked, 0.3s Time] [2023-02-14 02:16:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-14 02:16:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2023-02-14 02:16:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 76 states have (on average 1.5789473684210527) internal successors, (120), 113 states have internal predecessors, (120), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 02:16:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2023-02-14 02:16:48,525 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 43 [2023-02-14 02:16:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:48,525 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2023-02-14 02:16:48,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 4.4) internal successors, (66), 17 states have internal predecessors, (66), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 02:16:48,525 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2023-02-14 02:16:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 02:16:48,525 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:48,525 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:16:48,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 02:16:48,730 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 [2023-02-14 02:16:48,731 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1466883970, now seen corresponding path program 1 times [2023-02-14 02:16:48,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:48,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523385792] [2023-02-14 02:16:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:48,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:49,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:49,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:49,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:16:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 02:16:49,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:49,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523385792] [2023-02-14 02:16:49,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523385792] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:49,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688330266] [2023-02-14 02:16:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:49,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:16:49,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:16:49,386 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) [2023-02-14 02:16:49,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 02:16:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:49,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-14 02:16:49,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:16:49,621 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 [2023-02-14 02:16:49,808 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 [2023-02-14 02:16:49,931 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_2064 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2064))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)))) is different from true [2023-02-14 02:16:49,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:16:49,950 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 [2023-02-14 02:16:49,963 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-02-14 02:16:49,963 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 [2023-02-14 02:16:50,001 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 [2023-02-14 02:16:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-02-14 02:16:50,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:16:50,053 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2070 (Array Int Int)) (|v_node_create_~temp~0#1.base_52| Int)) (or (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_52| 1) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_52| v_ArrVal_2070) |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)) 1) (not (< |v_node_create_~temp~0#1.base_52| |c_#StackHeapBarrier|)))) is different from false [2023-02-14 02:16:50,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688330266] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:50,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 02:16:50,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2023-02-14 02:16:50,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674772558] [2023-02-14 02:16:50,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 02:16:50,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 02:16:50,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:50,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 02:16:50,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=623, Unknown=3, NotChecked=102, Total=812 [2023-02-14 02:16:50,056 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand has 28 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 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) [2023-02-14 02:16:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:50,914 INFO L93 Difference]: Finished difference Result 223 states and 239 transitions. [2023-02-14 02:16:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 02:16:50,914 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 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 46 [2023-02-14 02:16:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:50,916 INFO L225 Difference]: With dead ends: 223 [2023-02-14 02:16:50,916 INFO L226 Difference]: Without dead ends: 223 [2023-02-14 02:16:50,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=1127, Unknown=5, NotChecked=142, Total=1482 [2023-02-14 02:16:50,916 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1373 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 25 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:50,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 675 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1022 Invalid, 3 Unknown, 142 Unchecked, 0.6s Time] [2023-02-14 02:16:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-02-14 02:16:50,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 125. [2023-02-14 02:16:50,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 83 states have (on average 1.6506024096385543) internal successors, (137), 120 states have internal predecessors, (137), 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) [2023-02-14 02:16:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2023-02-14 02:16:50,919 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 46 [2023-02-14 02:16:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:50,920 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2023-02-14 02:16:50,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 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) [2023-02-14 02:16:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2023-02-14 02:16:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 02:16:50,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:50,920 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:16:50,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-14 02:16:51,126 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 [2023-02-14 02:16:51,127 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:51,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:51,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1466883971, now seen corresponding path program 1 times [2023-02-14 02:16:51,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:51,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207637892] [2023-02-14 02:16:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:51,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:51,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:51,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:51,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:16:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 02:16:52,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:52,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207637892] [2023-02-14 02:16:52,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207637892] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:52,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493165191] [2023-02-14 02:16:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:52,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:16:52,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:16:52,312 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) [2023-02-14 02:16:52,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 02:16:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:52,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-14 02:16:52,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:16:52,553 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 [2023-02-14 02:16:52,557 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 [2023-02-14 02:16:52,886 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 [2023-02-14 02:16:52,889 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 [2023-02-14 02:16:53,036 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_2311 (Array Int Int)) (v_ArrVal_2310 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2310)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2311)))) is different from true [2023-02-14 02:16:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:16:53,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-02-14 02:16:53,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:16:53,080 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 [2023-02-14 02:16:53,086 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 02:16:53,087 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 [2023-02-14 02:16:53,090 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 [2023-02-14 02:16:53,126 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 [2023-02-14 02:16:53,130 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 [2023-02-14 02:16:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-02-14 02:16:53,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:16:53,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493165191] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:53,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 02:16:53,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 30 [2023-02-14 02:16:53,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963624243] [2023-02-14 02:16:53,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 02:16:53,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 02:16:53,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:53,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 02:16:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1015, Unknown=1, NotChecked=64, Total=1190 [2023-02-14 02:16:53,914 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 31 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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) [2023-02-14 02:16:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:55,301 INFO L93 Difference]: Finished difference Result 204 states and 218 transitions. [2023-02-14 02:16:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 02:16:55,301 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 46 [2023-02-14 02:16:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:55,302 INFO L225 Difference]: With dead ends: 204 [2023-02-14 02:16:55,302 INFO L226 Difference]: Without dead ends: 204 [2023-02-14 02:16:55,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=220, Invalid=1763, Unknown=1, NotChecked=86, Total=2070 [2023-02-14 02:16:55,303 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 518 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:55,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1017 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1798 Invalid, 0 Unknown, 124 Unchecked, 1.0s Time] [2023-02-14 02:16:55,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-14 02:16:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 125. [2023-02-14 02:16:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 83 states have (on average 1.6265060240963856) internal successors, (135), 120 states have internal predecessors, (135), 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) [2023-02-14 02:16:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 141 transitions. [2023-02-14 02:16:55,306 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 141 transitions. Word has length 46 [2023-02-14 02:16:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:55,306 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 141 transitions. [2023-02-14 02:16:55,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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) [2023-02-14 02:16:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 141 transitions. [2023-02-14 02:16:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 02:16:55,307 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:55,307 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:16:55,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 02:16:55,514 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 [2023-02-14 02:16:55,514 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:55,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1771238793, now seen corresponding path program 1 times [2023-02-14 02:16:55,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:55,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132619533] [2023-02-14 02:16:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:55,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:55,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:55,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:55,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:16:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 02:16:55,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:55,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132619533] [2023-02-14 02:16:55,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132619533] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:55,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:55,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 02:16:55,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955413387] [2023-02-14 02:16:55,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:55,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 02:16:55,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 02:16:55,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 02:16:55,598 INFO L87 Difference]: Start difference. First operand 125 states and 141 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 02:16:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:55,671 INFO L93 Difference]: Finished difference Result 164 states and 176 transitions. [2023-02-14 02:16:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 02:16:55,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2023-02-14 02:16:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:55,673 INFO L225 Difference]: With dead ends: 164 [2023-02-14 02:16:55,673 INFO L226 Difference]: Without dead ends: 164 [2023-02-14 02:16:55,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 02:16:55,674 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 77 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:55,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 258 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 02:16:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-02-14 02:16:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 121. [2023-02-14 02:16:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.5696202531645569) internal successors, (124), 116 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 02:16:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2023-02-14 02:16:55,678 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 47 [2023-02-14 02:16:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:55,678 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2023-02-14 02:16:55,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 02:16:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2023-02-14 02:16:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 02:16:55,679 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:55,679 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:16:55,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-14 02:16:55,680 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:55,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1352997608, now seen corresponding path program 1 times [2023-02-14 02:16:55,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:55,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300660030] [2023-02-14 02:16:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:55,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:55,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:55,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:55,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:16:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 02:16:55,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:55,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300660030] [2023-02-14 02:16:55,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300660030] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:55,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:55,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 02:16:55,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780175081] [2023-02-14 02:16:55,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:55,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 02:16:55,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 02:16:55,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 02:16:55,802 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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) [2023-02-14 02:16:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:55,959 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2023-02-14 02:16:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 02:16:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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 49 [2023-02-14 02:16:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:55,960 INFO L225 Difference]: With dead ends: 133 [2023-02-14 02:16:55,960 INFO L226 Difference]: Without dead ends: 133 [2023-02-14 02:16:55,960 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 [2023-02-14 02:16:55,960 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 85 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:55,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 307 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 02:16:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-14 02:16:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2023-02-14 02:16:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 79 states have (on average 1.4936708860759493) internal successors, (118), 110 states have internal predecessors, (118), 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) [2023-02-14 02:16:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2023-02-14 02:16:55,962 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 49 [2023-02-14 02:16:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:55,962 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2023-02-14 02:16:55,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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) [2023-02-14 02:16:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2023-02-14 02:16:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 02:16:55,964 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:55,964 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:16:55,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-14 02:16:55,964 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:55,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1352997607, now seen corresponding path program 1 times [2023-02-14 02:16:55,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:55,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248911580] [2023-02-14 02:16:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:55,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:16:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 02:16:56,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:56,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248911580] [2023-02-14 02:16:56,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248911580] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:56,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:56,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 02:16:56,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962519940] [2023-02-14 02:16:56,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:56,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 02:16:56,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:56,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 02:16:56,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 02:16:56,066 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 02:16:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:56,139 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2023-02-14 02:16:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 02:16:56,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-02-14 02:16:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:56,140 INFO L225 Difference]: With dead ends: 114 [2023-02-14 02:16:56,140 INFO L226 Difference]: Without dead ends: 114 [2023-02-14 02:16:56,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 02:16:56,141 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 99 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:56,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 277 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 02:16:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-14 02:16:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-02-14 02:16:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 78 states have (on average 1.4871794871794872) 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) [2023-02-14 02:16:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2023-02-14 02:16:56,146 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 49 [2023-02-14 02:16:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:56,146 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2023-02-14 02:16:56,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 02:16:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2023-02-14 02:16:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 02:16:56,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:56,147 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 02:16:56,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-14 02:16:56,147 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:56,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1351857860, now seen corresponding path program 1 times [2023-02-14 02:16:56,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:56,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812430826] [2023-02-14 02:16:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:56,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:16:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 02:16:56,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:56,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812430826] [2023-02-14 02:16:56,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812430826] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:56,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:56,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 02:16:56,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845825317] [2023-02-14 02:16:56,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:56,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 02:16:56,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:56,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 02:16:56,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-14 02:16:56,274 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 02:16:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:56,351 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2023-02-14 02:16:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 02:16:56,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-02-14 02:16:56,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:56,352 INFO L225 Difference]: With dead ends: 111 [2023-02-14 02:16:56,352 INFO L226 Difference]: Without dead ends: 111 [2023-02-14 02:16:56,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 02:16:56,353 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 177 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:56,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 219 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 02:16:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-14 02:16:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-02-14 02:16:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 77 states have (on average 1.4545454545454546) internal successors, (112), 106 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) [2023-02-14 02:16:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2023-02-14 02:16:56,355 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 49 [2023-02-14 02:16:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:56,355 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2023-02-14 02:16:56,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 02:16:56,355 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2023-02-14 02:16:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 02:16:56,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:56,355 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:16:56,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-14 02:16:56,356 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:56,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1042077693, now seen corresponding path program 1 times [2023-02-14 02:16:56,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:56,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583424739] [2023-02-14 02:16:56,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:56,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:16:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 02:16:56,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:56,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583424739] [2023-02-14 02:16:56,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583424739] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:56,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:56,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 02:16:56,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165367582] [2023-02-14 02:16:56,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:56,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 02:16:56,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:56,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 02:16:56,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 02:16:56,445 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 02:16:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:56,553 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2023-02-14 02:16:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 02:16:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-02-14 02:16:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:56,555 INFO L225 Difference]: With dead ends: 169 [2023-02-14 02:16:56,555 INFO L226 Difference]: Without dead ends: 169 [2023-02-14 02:16:56,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 02:16:56,556 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 163 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:56,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 215 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 02:16:56,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-14 02:16:56,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 110. [2023-02-14 02:16:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 77 states have (on average 1.4415584415584415) internal successors, (111), 105 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) [2023-02-14 02:16:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2023-02-14 02:16:56,558 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 50 [2023-02-14 02:16:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:56,558 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2023-02-14 02:16:56,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 02:16:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2023-02-14 02:16:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 02:16:56,558 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:56,558 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:16:56,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-14 02:16:56,559 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1042077694, now seen corresponding path program 1 times [2023-02-14 02:16:56,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:56,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616524555] [2023-02-14 02:16:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:56,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:16:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 02:16:56,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:56,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616524555] [2023-02-14 02:16:56,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616524555] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:56,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:56,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 02:16:56,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826601278] [2023-02-14 02:16:56,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:56,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 02:16:56,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 02:16:56,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 02:16:56,662 INFO L87 Difference]: Start difference. First operand 110 states and 117 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 02:16:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:56,766 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2023-02-14 02:16:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 02:16:56,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-02-14 02:16:56,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:56,767 INFO L225 Difference]: With dead ends: 109 [2023-02-14 02:16:56,767 INFO L226 Difference]: Without dead ends: 109 [2023-02-14 02:16:56,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 02:16:56,768 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 82 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:56,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 202 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 02:16:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-14 02:16:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-02-14 02:16:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 77 states have (on average 1.4285714285714286) internal successors, (110), 104 states have internal predecessors, (110), 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) [2023-02-14 02:16:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2023-02-14 02:16:56,770 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 50 [2023-02-14 02:16:56,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:56,770 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2023-02-14 02:16:56,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 02:16:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2023-02-14 02:16:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 02:16:56,770 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:56,770 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:16:56,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-14 02:16:56,770 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:56,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:56,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2055329845, now seen corresponding path program 1 times [2023-02-14 02:16:56,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:56,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129459759] [2023-02-14 02:16:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:56,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:16:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 02:16:56,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:56,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129459759] [2023-02-14 02:16:56,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129459759] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 02:16:56,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 02:16:56,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 02:16:56,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732911561] [2023-02-14 02:16:56,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 02:16:56,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 02:16:56,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:16:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 02:16:56,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 02:16:56,959 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-02-14 02:16:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:16:57,104 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2023-02-14 02:16:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 02:16:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 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 51 [2023-02-14 02:16:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:16:57,105 INFO L225 Difference]: With dead ends: 103 [2023-02-14 02:16:57,105 INFO L226 Difference]: Without dead ends: 103 [2023-02-14 02:16:57,106 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 [2023-02-14 02:16:57,106 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 76 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:16:57,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 310 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 02:16:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-14 02:16:57,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-02-14 02:16:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.3506493506493507) internal successors, (104), 98 states have internal predecessors, (104), 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) [2023-02-14 02:16:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2023-02-14 02:16:57,108 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 51 [2023-02-14 02:16:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:16:57,108 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2023-02-14 02:16:57,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-02-14 02:16:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2023-02-14 02:16:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 02:16:57,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:16:57,108 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:16:57,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-14 02:16:57,109 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:16:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:16:57,109 INFO L85 PathProgramCache]: Analyzing trace with hash 512975501, now seen corresponding path program 1 times [2023-02-14 02:16:57,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:16:57,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467636223] [2023-02-14 02:16:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:57,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:16:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:57,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:16:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:57,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:16:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:58,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:16:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 02:16:58,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:16:58,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467636223] [2023-02-14 02:16:58,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467636223] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:16:58,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919878691] [2023-02-14 02:16:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:16:58,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:16:58,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:16:58,677 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) [2023-02-14 02:16:58,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 02:16:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:16:58,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-14 02:16:58,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:16:58,972 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 [2023-02-14 02:16:59,163 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 02:16:59,163 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 [2023-02-14 02:16:59,260 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 [2023-02-14 02:16:59,331 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:16:59,331 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 35 treesize of output 34 [2023-02-14 02:16:59,454 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:16:59,454 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 [2023-02-14 02:16:59,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:16:59,507 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 31 treesize of output 26 [2023-02-14 02:16:59,626 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 02:16:59,627 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 39 treesize of output 22 [2023-02-14 02:16:59,630 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 [2023-02-14 02:16:59,778 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_3634 (Array Int Int)) (v_ArrVal_3635 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_3635)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_3634)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-14 02:16:59,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:16:59,836 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 02:16:59,836 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 45 treesize of output 43 [2023-02-14 02:16:59,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:16:59,841 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 [2023-02-14 02:16:59,860 INFO L321 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2023-02-14 02:16:59,861 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 36 treesize of output 52 [2023-02-14 02:16:59,901 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 [2023-02-14 02:17:00,030 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 02:17:00,030 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 50 treesize of output 25 [2023-02-14 02:17:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-14 02:17:00,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:17:00,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919878691] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:17:00,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 02:17:00,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 47 [2023-02-14 02:17:00,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070993866] [2023-02-14 02:17:00,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 02:17:00,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-14 02:17:00,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:17:00,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-14 02:17:00,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2083, Unknown=1, NotChecked=92, Total=2352 [2023-02-14 02:17:00,300 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 48 states, 43 states have (on average 2.0) internal successors, (86), 41 states have internal predecessors, (86), 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) [2023-02-14 02:17:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:17:02,275 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2023-02-14 02:17:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 02:17:02,275 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 2.0) internal successors, (86), 41 states have internal predecessors, (86), 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 53 [2023-02-14 02:17:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:17:02,276 INFO L225 Difference]: With dead ends: 121 [2023-02-14 02:17:02,276 INFO L226 Difference]: Without dead ends: 121 [2023-02-14 02:17:02,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=396, Invalid=3267, Unknown=1, NotChecked=118, Total=3782 [2023-02-14 02:17:02,277 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 328 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 2084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:17:02,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 1219 Invalid, 2084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1939 Invalid, 0 Unknown, 126 Unchecked, 1.1s Time] [2023-02-14 02:17:02,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-14 02:17:02,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2023-02-14 02:17:02,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 97 states have internal predecessors, (103), 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) [2023-02-14 02:17:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2023-02-14 02:17:02,279 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 53 [2023-02-14 02:17:02,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:17:02,279 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2023-02-14 02:17:02,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 2.0) internal successors, (86), 41 states have internal predecessors, (86), 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) [2023-02-14 02:17:02,280 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2023-02-14 02:17:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 02:17:02,280 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:17:02,280 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:17:02,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 02:17:02,486 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,SelfDestructingSolverStorable24 [2023-02-14 02:17:02,486 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:17:02,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:17:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash 512975502, now seen corresponding path program 1 times [2023-02-14 02:17:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:17:02,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417416756] [2023-02-14 02:17:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:17:02,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:17:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:17:03,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:17:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:17:03,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:17:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:17:03,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:17:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:17:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 02:17:04,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:17:04,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417416756] [2023-02-14 02:17:04,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417416756] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:17:04,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453269873] [2023-02-14 02:17:04,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:17:04,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:17:04,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:17:04,519 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) [2023-02-14 02:17:04,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 02:17:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:17:04,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 115 conjunts are in the unsatisfiable core [2023-02-14 02:17:04,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:17:04,811 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 [2023-02-14 02:17:05,061 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 02:17:05,061 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 [2023-02-14 02:17:05,184 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 [2023-02-14 02:17:05,197 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 [2023-02-14 02:17:05,285 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:17:05,285 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 60 treesize of output 55 [2023-02-14 02:17:05,289 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 33 treesize of output 33 [2023-02-14 02:17:05,450 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:17:05,450 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 53 treesize of output 50 [2023-02-14 02:17:05,455 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 33 treesize of output 33 [2023-02-14 02:17:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:05,526 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 36 treesize of output 31 [2023-02-14 02:17:05,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:05,530 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 46 treesize of output 37 [2023-02-14 02:17:05,680 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 02:17:05,680 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 73 treesize of output 40 [2023-02-14 02:17:05,704 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-02-14 02:17:05,897 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3937 (Array Int Int)) (|node_create_~temp~0#1.base| Int) (v_ArrVal_3936 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_3937)) (= (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_3936) |c_#memory_$Pointer$.offset|))) is different from true [2023-02-14 02:17:05,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:05,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:05,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:05,931 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 48 treesize of output 47 [2023-02-14 02:17:05,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:05,944 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 02:17:05,944 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 79 treesize of output 67 [2023-02-14 02:17:05,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:05,949 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 32 treesize of output 27 [2023-02-14 02:17:05,961 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-14 02:17:05,961 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 [2023-02-14 02:17:06,187 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-14 02:17:06,187 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 47 [2023-02-14 02:17:06,194 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 02:17:06,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 23 [2023-02-14 02:17:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-14 02:17:06,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:17:08,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453269873] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:17:08,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 02:17:08,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 51 [2023-02-14 02:17:08,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383289643] [2023-02-14 02:17:08,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 02:17:08,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-14 02:17:08,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:17:08,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-14 02:17:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3013, Unknown=1, NotChecked=110, Total=3306 [2023-02-14 02:17:08,280 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 52 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 45 states have internal predecessors, (90), 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) [2023-02-14 02:17:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:17:11,154 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2023-02-14 02:17:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 02:17:11,154 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 45 states have internal predecessors, (90), 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 53 [2023-02-14 02:17:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:17:11,155 INFO L225 Difference]: With dead ends: 101 [2023-02-14 02:17:11,155 INFO L226 Difference]: Without dead ends: 101 [2023-02-14 02:17:11,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=421, Invalid=4838, Unknown=1, NotChecked=142, Total=5402 [2023-02-14 02:17:11,156 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 350 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-14 02:17:11,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 1245 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2108 Invalid, 0 Unknown, 105 Unchecked, 1.2s Time] [2023-02-14 02:17:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-14 02:17:11,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-14 02:17:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 77 states have (on average 1.3246753246753247) internal successors, (102), 96 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) [2023-02-14 02:17:11,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2023-02-14 02:17:11,158 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 53 [2023-02-14 02:17:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:17:11,158 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2023-02-14 02:17:11,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 45 states have internal predecessors, (90), 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) [2023-02-14 02:17:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2023-02-14 02:17:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 02:17:11,159 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:17:11,159 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:17:11,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 02:17:11,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-14 02:17:11,366 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:17:11,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:17:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash 167962770, now seen corresponding path program 1 times [2023-02-14 02:17:11,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:17:11,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629791261] [2023-02-14 02:17:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:17:11,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:17:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:17:12,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:17:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:17:12,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:17:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:17:13,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:17:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:17:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 02:17:13,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:17:13,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629791261] [2023-02-14 02:17:13,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629791261] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:17:13,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159805206] [2023-02-14 02:17:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:17:13,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:17:13,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:17:13,720 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) [2023-02-14 02:17:13,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 02:17:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:17:14,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 116 conjunts are in the unsatisfiable core [2023-02-14 02:17:14,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:17:14,073 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 [2023-02-14 02:17:14,080 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 [2023-02-14 02:17:14,210 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 02:17:14,211 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 [2023-02-14 02:17:14,350 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 [2023-02-14 02:17:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:14,496 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 02:17:14,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2023-02-14 02:17:14,637 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 [2023-02-14 02:17:14,738 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:17:14,738 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 43 treesize of output 40 [2023-02-14 02:17:14,916 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:17:14,916 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 36 treesize of output 35 [2023-02-14 02:17:14,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:14,996 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 39 treesize of output 30 [2023-02-14 02:17:15,175 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 02:17:15,176 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 58 treesize of output 25 [2023-02-14 02:17:15,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:15,183 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 [2023-02-14 02:17:15,186 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 [2023-02-14 02:17:21,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:21,496 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 02:17:21,496 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 68 treesize of output 51 [2023-02-14 02:17:21,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:21,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:21,636 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-14 02:17:21,636 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 [2023-02-14 02:17:21,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:17:21,653 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 16 treesize of output 11 [2023-02-14 02:17:23,380 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 [2023-02-14 02:17:27,745 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 02:17:27,746 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 2 case distinctions, treesize of input 192 treesize of output 131 [2023-02-14 02:17:27,783 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 116 treesize of output 100 [2023-02-14 02:17:28,640 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:17:28,640 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 1 case distinctions, treesize of input 117 treesize of output 103 [2023-02-14 02:17:28,854 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:17:28,854 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 1 case distinctions, treesize of input 117 treesize of output 103 [2023-02-14 02:17:29,377 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 33 treesize of output 31 [2023-02-14 02:17:29,961 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 26 treesize of output 14 [2023-02-14 02:17:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 02:17:29,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:17:30,068 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4249 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_4249) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2023-02-14 02:17:47,758 INFO L321 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2023-02-14 02:17:47,759 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 29 treesize of output 28 [2023-02-14 02:18:00,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159805206] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:18:00,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 02:18:00,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 61 [2023-02-14 02:18:01,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073408599] [2023-02-14 02:18:01,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 02:18:01,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-14 02:18:01,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:18:01,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-14 02:18:01,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=4551, Unknown=174, NotChecked=138, Total=5112 [2023-02-14 02:18:01,002 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand has 62 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 53 states have internal predecessors, (94), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 02:18:32,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 02:18:32,899 INFO L93 Difference]: Finished difference Result 225 states and 239 transitions. [2023-02-14 02:18:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 02:18:32,900 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 53 states have internal predecessors, (94), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 57 [2023-02-14 02:18:32,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 02:18:32,901 INFO L225 Difference]: With dead ends: 225 [2023-02-14 02:18:32,901 INFO L226 Difference]: Without dead ends: 225 [2023-02-14 02:18:32,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=682, Invalid=7520, Unknown=174, NotChecked=180, Total=8556 [2023-02-14 02:18:32,903 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 947 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-02-14 02:18:32,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 1323 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2023-02-14 02:18:32,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-14 02:18:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 104. [2023-02-14 02:18:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 81 states have (on average 1.308641975308642) internal successors, (106), 99 states have internal predecessors, (106), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 02:18:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2023-02-14 02:18:32,922 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 57 [2023-02-14 02:18:32,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 02:18:32,923 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2023-02-14 02:18:32,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 53 states have internal predecessors, (94), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 02:18:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2023-02-14 02:18:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 02:18:32,924 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 02:18:32,924 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 02:18:32,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 02:18:33,132 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,SelfDestructingSolverStorable26 [2023-02-14 02:18:33,132 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-02-14 02:18:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 02:18:33,133 INFO L85 PathProgramCache]: Analyzing trace with hash 167962771, now seen corresponding path program 1 times [2023-02-14 02:18:33,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 02:18:33,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097040551] [2023-02-14 02:18:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:18:33,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 02:18:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:18:39,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 02:18:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:18:40,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 02:18:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:18:41,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 02:18:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:18:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 02:18:44,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 02:18:44,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097040551] [2023-02-14 02:18:44,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097040551] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:18:44,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780851919] [2023-02-14 02:18:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 02:18:44,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 02:18:44,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 02:18:44,504 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) [2023-02-14 02:18:44,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 02:18:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 02:18:44,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 127 conjunts are in the unsatisfiable core [2023-02-14 02:18:44,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 02:18:44,861 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 [2023-02-14 02:18:44,914 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 [2023-02-14 02:18:46,397 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 02:18:46,397 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 [2023-02-14 02:18:47,436 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 [2023-02-14 02:18:48,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:18:48,976 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 02:18:48,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2023-02-14 02:18:50,262 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 [2023-02-14 02:18:50,988 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:18:50,989 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 43 treesize of output 40 [2023-02-14 02:18:52,204 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:18:52,205 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 36 treesize of output 35 [2023-02-14 02:18:52,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:18:52,793 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 39 treesize of output 30 [2023-02-14 02:18:54,165 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 02:18:54,165 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 67 treesize of output 30 [2023-02-14 02:18:54,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2023-02-14 02:18:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:18:54,199 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 [2023-02-14 02:18:54,211 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 [2023-02-14 02:20:01,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:20:01,797 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 02:20:01,797 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 77 treesize of output 58 [2023-02-14 02:20:01,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:20:01,842 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 [2023-02-14 02:20:01,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:20:01,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:20:02,002 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-14 02:20:02,002 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 [2023-02-14 02:20:02,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:20:02,023 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 16 treesize of output 11 [2023-02-14 02:20:10,306 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 02:20:10,306 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 2 case distinctions, treesize of input 206 treesize of output 143 [2023-02-14 02:20:10,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:20:10,351 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 27 treesize of output 27 [2023-02-14 02:20:10,375 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 100 [2023-02-14 02:20:11,506 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 02:20:11,506 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-02-14 02:20:11,531 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 [2023-02-14 02:20:11,619 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:20:11,619 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 1 case distinctions, treesize of input 117 treesize of output 103 [2023-02-14 02:20:12,523 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 02:20:12,524 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 1 case distinctions, treesize of input 117 treesize of output 103 [2023-02-14 02:20:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 02:20:12,568 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 14 treesize of output 16 [2023-02-14 02:20:13,167 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 33 treesize of output 31 [2023-02-14 02:20:13,193 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 14 treesize of output 16 [2023-02-14 02:20:13,824 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 26 treesize of output 14 [2023-02-14 02:20:13,849 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 [2023-02-14 02:20:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 02:20:15,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 02:20:16,781 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4562 (Array Int Int)) (v_ArrVal_4563 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_4562) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 12) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_4563) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_4562 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_4562) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)))) is different from false [2023-02-14 02:20:43,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780851919] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 02:20:43,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 02:20:43,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 65 [2023-02-14 02:20:43,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649401310] [2023-02-14 02:20:43,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 02:20:43,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-14 02:20:43,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 02:20:43,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-14 02:20:43,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=5686, Unknown=41, NotChecked=152, Total=6162 [2023-02-14 02:20:43,201 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 66 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 57 states have internal predecessors, (96), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 02:20:46,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 02:20:52,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 02:20:56,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 02:20:59,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]