./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0217.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0217.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 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 20:23:57,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 20:23:57,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 20:23:57,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 20:23:57,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 20:23:57,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 20:23:57,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 20:23:57,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 20:23:57,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 20:23:57,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 20:23:57,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 20:23:57,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 20:23:57,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 20:23:57,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 20:23:57,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 20:23:57,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 20:23:57,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 20:23:57,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 20:23:57,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 20:23:57,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 20:23:57,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 20:23:57,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 20:23:57,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 20:23:57,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 20:23:57,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 20:23:57,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 20:23:57,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 20:23:57,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 20:23:57,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 20:23:57,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 20:23:57,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 20:23:57,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 20:23:57,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 20:23:57,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 20:23:57,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 20:23:57,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 20:23:57,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 20:23:57,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 20:23:57,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 20:23:57,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 20:23:57,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 20:23:57,226 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 20:23:57,249 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 20:23:57,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 20:23:57,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 20:23:57,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 20:23:57,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 20:23:57,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 20:23:57,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 20:23:57,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 20:23:57,251 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 20:23:57,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 20:23:57,252 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 20:23:57,252 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 20:23:57,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 20:23:57,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 20:23:57,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 20:23:57,253 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 20:23:57,253 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 20:23:57,253 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 20:23:57,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 20:23:57,254 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 20:23:57,254 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 20:23:57,254 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 20:23:57,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 20:23:57,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 20:23:57,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 20:23:57,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:23:57,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 20:23:57,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 20:23:57,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 20:23:57,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 20:23:57,255 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 20:23:57,255 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 20:23:57,255 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 20:23:57,256 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 20:23:57,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec [2023-02-18 20:23:57,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 20:23:57,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 20:23:57,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 20:23:57,430 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 20:23:57,430 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 20:23:57,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0217.i [2023-02-18 20:23:58,460 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 20:23:58,690 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 20:23:58,693 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0217.i [2023-02-18 20:23:58,708 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca2ecdbc0/c837cdfe9f624ca5aa0897486f13a47b/FLAG34ba1241a [2023-02-18 20:23:58,724 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca2ecdbc0/c837cdfe9f624ca5aa0897486f13a47b [2023-02-18 20:23:58,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 20:23:58,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 20:23:58,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 20:23:58,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 20:23:58,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 20:23:58,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:23:58" (1/1) ... [2023-02-18 20:23:58,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a898c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:58, skipping insertion in model container [2023-02-18 20:23:58,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:23:58" (1/1) ... [2023-02-18 20:23:58,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 20:23:58,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 20:23:59,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:23:59,117 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 20:23:59,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:23:59,199 INFO L208 MainTranslator]: Completed translation [2023-02-18 20:23:59,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59 WrapperNode [2023-02-18 20:23:59,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 20:23:59,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 20:23:59,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 20:23:59,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 20:23:59,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59" (1/1) ... [2023-02-18 20:23:59,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59" (1/1) ... [2023-02-18 20:23:59,267 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 210 [2023-02-18 20:23:59,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 20:23:59,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 20:23:59,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 20:23:59,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 20:23:59,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59" (1/1) ... [2023-02-18 20:23:59,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59" (1/1) ... [2023-02-18 20:23:59,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59" (1/1) ... [2023-02-18 20:23:59,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59" (1/1) ... [2023-02-18 20:23:59,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59" (1/1) ... [2023-02-18 20:23:59,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59" (1/1) ... [2023-02-18 20:23:59,315 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59" (1/1) ... [2023-02-18 20:23:59,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59" (1/1) ... [2023-02-18 20:23:59,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 20:23:59,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 20:23:59,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 20:23:59,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 20:23:59,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59" (1/1) ... [2023-02-18 20:23:59,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:23:59,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:23:59,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 20:23:59,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 20:23:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-02-18 20:23:59,397 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-02-18 20:23:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 20:23:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 20:23:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 20:23:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 20:23:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 20:23:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 20:23:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 20:23:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 20:23:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 20:23:59,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 20:23:59,503 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 20:23:59,505 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 20:23:59,921 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 20:23:59,928 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 20:23:59,928 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-18 20:23:59,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:23:59 BoogieIcfgContainer [2023-02-18 20:23:59,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 20:23:59,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 20:23:59,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 20:23:59,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 20:23:59,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 08:23:58" (1/3) ... [2023-02-18 20:23:59,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752fe26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:23:59, skipping insertion in model container [2023-02-18 20:23:59,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:23:59" (2/3) ... [2023-02-18 20:23:59,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752fe26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:23:59, skipping insertion in model container [2023-02-18 20:23:59,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:23:59" (3/3) ... [2023-02-18 20:23:59,938 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217.i [2023-02-18 20:23:59,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 20:23:59,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2023-02-18 20:23:59,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 20:23:59,996 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;@688a28e1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 20:23:59,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-02-18 20:24:00,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 96 states have (on average 1.9583333333333333) internal successors, (188), 163 states have internal predecessors, (188), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 20:24:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:24:00,005 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:00,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:24:00,006 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:00,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:00,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1074518762, now seen corresponding path program 1 times [2023-02-18 20:24:00,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:00,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580530409] [2023-02-18 20:24:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:00,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:00,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:00,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580530409] [2023-02-18 20:24:00,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580530409] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:00,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:00,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:24:00,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858646159] [2023-02-18 20:24:00,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:00,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 20:24:00,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:00,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 20:24:00,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 20:24:00,188 INFO L87 Difference]: Start difference. First operand has 167 states, 96 states have (on average 1.9583333333333333) internal successors, (188), 163 states have internal predecessors, (188), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:00,220 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2023-02-18 20:24:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 20:24:00,223 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 20:24:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:00,233 INFO L225 Difference]: With dead ends: 167 [2023-02-18 20:24:00,233 INFO L226 Difference]: Without dead ends: 165 [2023-02-18 20:24:00,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 20:24:00,239 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:00,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:24:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-18 20:24:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-02-18 20:24:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 95 states have (on average 1.894736842105263) internal successors, (180), 161 states have internal predecessors, (180), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 20:24:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 184 transitions. [2023-02-18 20:24:00,295 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 184 transitions. Word has length 6 [2023-02-18 20:24:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:00,296 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 184 transitions. [2023-02-18 20:24:00,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 184 transitions. [2023-02-18 20:24:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 20:24:00,299 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:00,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:00,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 20:24:00,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:00,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1280331232, now seen corresponding path program 1 times [2023-02-18 20:24:00,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:00,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792583569] [2023-02-18 20:24:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:00,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:00,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:00,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792583569] [2023-02-18 20:24:00,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792583569] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:00,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-18 20:24:00,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148538545] [2023-02-18 20:24:00,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:00,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:24:00,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:24:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:24:00,409 INFO L87 Difference]: Start difference. First operand 165 states and 184 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:00,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:00,562 INFO L93 Difference]: Finished difference Result 321 states and 358 transitions. [2023-02-18 20:24:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:24:00,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 20:24:00,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:00,565 INFO L225 Difference]: With dead ends: 321 [2023-02-18 20:24:00,565 INFO L226 Difference]: Without dead ends: 321 [2023-02-18 20:24:00,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:24:00,566 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 165 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:00,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 237 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-02-18 20:24:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 229. [2023-02-18 20:24:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 156 states have (on average 1.8717948717948718) internal successors, (292), 222 states have internal predecessors, (292), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 20:24:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 300 transitions. [2023-02-18 20:24:00,577 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 300 transitions. Word has length 7 [2023-02-18 20:24:00,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:00,578 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 300 transitions. [2023-02-18 20:24:00,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 300 transitions. [2023-02-18 20:24:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 20:24:00,578 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:00,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:00,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 20:24:00,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:00,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:00,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1280331231, now seen corresponding path program 1 times [2023-02-18 20:24:00,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:00,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236137726] [2023-02-18 20:24:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:00,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:00,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:00,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236137726] [2023-02-18 20:24:00,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236137726] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:00,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:00,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:24:00,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439870878] [2023-02-18 20:24:00,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:00,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:24:00,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:00,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:24:00,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:00,662 INFO L87 Difference]: Start difference. First operand 229 states and 300 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:00,785 INFO L93 Difference]: Finished difference Result 368 states and 462 transitions. [2023-02-18 20:24:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:24:00,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 20:24:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:00,787 INFO L225 Difference]: With dead ends: 368 [2023-02-18 20:24:00,787 INFO L226 Difference]: Without dead ends: 368 [2023-02-18 20:24:00,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:00,788 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 134 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:00,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 346 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:00,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-02-18 20:24:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 302. [2023-02-18 20:24:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 223 states have (on average 1.8340807174887892) internal successors, (409), 291 states have internal predecessors, (409), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 20:24:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 425 transitions. [2023-02-18 20:24:00,799 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 425 transitions. Word has length 7 [2023-02-18 20:24:00,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:00,800 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 425 transitions. [2023-02-18 20:24:00,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:00,800 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 425 transitions. [2023-02-18 20:24:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 20:24:00,800 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:00,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:00,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 20:24:00,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:00,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1280331169, now seen corresponding path program 1 times [2023-02-18 20:24:00,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:00,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904833808] [2023-02-18 20:24:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:00,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:00,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:00,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904833808] [2023-02-18 20:24:00,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904833808] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:00,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:00,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:24:00,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150408053] [2023-02-18 20:24:00,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:00,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:24:00,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:24:00,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:00,858 INFO L87 Difference]: Start difference. First operand 302 states and 425 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:00,976 INFO L93 Difference]: Finished difference Result 367 states and 460 transitions. [2023-02-18 20:24:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:24:00,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 20:24:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:00,978 INFO L225 Difference]: With dead ends: 367 [2023-02-18 20:24:00,978 INFO L226 Difference]: Without dead ends: 367 [2023-02-18 20:24:00,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:00,979 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 116 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:00,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 360 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-02-18 20:24:00,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 302. [2023-02-18 20:24:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 223 states have (on average 1.8340807174887892) internal successors, (409), 291 states have internal predecessors, (409), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 20:24:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 425 transitions. [2023-02-18 20:24:00,988 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 425 transitions. Word has length 7 [2023-02-18 20:24:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:00,989 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 425 transitions. [2023-02-18 20:24:00,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 425 transitions. [2023-02-18 20:24:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 20:24:00,989 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:00,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:00,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 20:24:00,990 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:00,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:00,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1257058894, now seen corresponding path program 1 times [2023-02-18 20:24:00,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:00,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606208183] [2023-02-18 20:24:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:00,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:01,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:01,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606208183] [2023-02-18 20:24:01,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606208183] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:01,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:01,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:24:01,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233935627] [2023-02-18 20:24:01,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:01,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:24:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:01,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:24:01,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:24:01,091 INFO L87 Difference]: Start difference. First operand 302 states and 425 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:01,254 INFO L93 Difference]: Finished difference Result 449 states and 603 transitions. [2023-02-18 20:24:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:24:01,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 20:24:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:01,256 INFO L225 Difference]: With dead ends: 449 [2023-02-18 20:24:01,257 INFO L226 Difference]: Without dead ends: 449 [2023-02-18 20:24:01,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-18 20:24:01,257 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 146 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:01,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 729 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-02-18 20:24:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 344. [2023-02-18 20:24:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 262 states have (on average 1.816793893129771) internal successors, (476), 331 states have internal predecessors, (476), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 20:24:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 496 transitions. [2023-02-18 20:24:01,265 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 496 transitions. Word has length 10 [2023-02-18 20:24:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:01,265 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 496 transitions. [2023-02-18 20:24:01,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:01,265 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 496 transitions. [2023-02-18 20:24:01,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 20:24:01,266 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:01,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:01,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 20:24:01,266 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:01,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1258905936, now seen corresponding path program 1 times [2023-02-18 20:24:01,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:01,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222197411] [2023-02-18 20:24:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:01,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:01,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:01,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222197411] [2023-02-18 20:24:01,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222197411] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:01,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:01,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:24:01,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735055549] [2023-02-18 20:24:01,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:01,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:24:01,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:01,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:24:01,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:24:01,337 INFO L87 Difference]: Start difference. First operand 344 states and 496 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:01,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:01,473 INFO L93 Difference]: Finished difference Result 439 states and 592 transitions. [2023-02-18 20:24:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:24:01,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 20:24:01,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:01,475 INFO L225 Difference]: With dead ends: 439 [2023-02-18 20:24:01,475 INFO L226 Difference]: Without dead ends: 439 [2023-02-18 20:24:01,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:24:01,476 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 125 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:01,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 694 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:01,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-02-18 20:24:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 343. [2023-02-18 20:24:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 261 states have (on average 1.8199233716475096) internal successors, (475), 330 states have internal predecessors, (475), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 20:24:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 495 transitions. [2023-02-18 20:24:01,483 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 495 transitions. Word has length 10 [2023-02-18 20:24:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:01,483 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 495 transitions. [2023-02-18 20:24:01,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 495 transitions. [2023-02-18 20:24:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 20:24:01,484 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:01,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:01,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 20:24:01,484 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash 314118792, now seen corresponding path program 1 times [2023-02-18 20:24:01,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:01,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405730637] [2023-02-18 20:24:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:01,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:01,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:01,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405730637] [2023-02-18 20:24:01,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405730637] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:01,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:01,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:24:01,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629123942] [2023-02-18 20:24:01,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:01,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:24:01,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:01,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:24:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:24:01,498 INFO L87 Difference]: Start difference. First operand 343 states and 495 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:01,620 INFO L93 Difference]: Finished difference Result 394 states and 542 transitions. [2023-02-18 20:24:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:24:01,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 20:24:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:01,622 INFO L225 Difference]: With dead ends: 394 [2023-02-18 20:24:01,622 INFO L226 Difference]: Without dead ends: 387 [2023-02-18 20:24:01,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:24:01,623 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 64 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:01,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 275 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-02-18 20:24:01,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 340. [2023-02-18 20:24:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 258 states have (on average 1.821705426356589) internal successors, (470), 327 states have internal predecessors, (470), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 20:24:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 490 transitions. [2023-02-18 20:24:01,629 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 490 transitions. Word has length 11 [2023-02-18 20:24:01,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:01,629 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 490 transitions. [2023-02-18 20:24:01,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:24:01,629 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 490 transitions. [2023-02-18 20:24:01,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 20:24:01,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:01,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:01,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 20:24:01,630 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:01,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:01,631 INFO L85 PathProgramCache]: Analyzing trace with hash -584855357, now seen corresponding path program 1 times [2023-02-18 20:24:01,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:01,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319985182] [2023-02-18 20:24:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:01,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 20:24:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:01,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:01,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319985182] [2023-02-18 20:24:01,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319985182] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:01,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:01,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:24:01,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721695364] [2023-02-18 20:24:01,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:01,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:24:01,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:01,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:24:01,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:01,692 INFO L87 Difference]: Start difference. First operand 340 states and 490 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:01,863 INFO L93 Difference]: Finished difference Result 554 states and 710 transitions. [2023-02-18 20:24:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:24:01,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 15 [2023-02-18 20:24:01,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:01,865 INFO L225 Difference]: With dead ends: 554 [2023-02-18 20:24:01,865 INFO L226 Difference]: Without dead ends: 554 [2023-02-18 20:24:01,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:24:01,866 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 317 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:01,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 416 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:01,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-02-18 20:24:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 346. [2023-02-18 20:24:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 264 states have (on average 1.803030303030303) internal successors, (476), 333 states have internal predecessors, (476), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 20:24:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 496 transitions. [2023-02-18 20:24:01,873 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 496 transitions. Word has length 15 [2023-02-18 20:24:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:01,873 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 496 transitions. [2023-02-18 20:24:01,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 496 transitions. [2023-02-18 20:24:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 20:24:01,874 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:01,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:01,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-18 20:24:01,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:01,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:01,874 INFO L85 PathProgramCache]: Analyzing trace with hash -584855356, now seen corresponding path program 1 times [2023-02-18 20:24:01,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:01,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032569601] [2023-02-18 20:24:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:01,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:01,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 20:24:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:01,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:01,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032569601] [2023-02-18 20:24:01,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032569601] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:01,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:01,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:24:01,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135901576] [2023-02-18 20:24:01,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:01,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:24:01,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:01,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:24:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:01,967 INFO L87 Difference]: Start difference. First operand 346 states and 496 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:02,105 INFO L93 Difference]: Finished difference Result 400 states and 518 transitions. [2023-02-18 20:24:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:24:02,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 15 [2023-02-18 20:24:02,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:02,109 INFO L225 Difference]: With dead ends: 400 [2023-02-18 20:24:02,110 INFO L226 Difference]: Without dead ends: 400 [2023-02-18 20:24:02,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:24:02,110 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 185 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:02,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 416 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-02-18 20:24:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 346. [2023-02-18 20:24:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 264 states have (on average 1.768939393939394) internal successors, (467), 333 states have internal predecessors, (467), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 20:24:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 487 transitions. [2023-02-18 20:24:02,137 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 487 transitions. Word has length 15 [2023-02-18 20:24:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:02,137 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 487 transitions. [2023-02-18 20:24:02,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 487 transitions. [2023-02-18 20:24:02,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 20:24:02,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:02,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:02,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 20:24:02,138 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:02,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:02,139 INFO L85 PathProgramCache]: Analyzing trace with hash 590215118, now seen corresponding path program 1 times [2023-02-18 20:24:02,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:02,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123687285] [2023-02-18 20:24:02,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:02,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:02,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:02,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:02,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123687285] [2023-02-18 20:24:02,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123687285] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:02,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:02,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:24:02,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496545452] [2023-02-18 20:24:02,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:02,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 20:24:02,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:02,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 20:24:02,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:24:02,207 INFO L87 Difference]: Start difference. First operand 346 states and 487 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:02,468 INFO L93 Difference]: Finished difference Result 683 states and 818 transitions. [2023-02-18 20:24:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 20:24:02,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 17 [2023-02-18 20:24:02,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:02,472 INFO L225 Difference]: With dead ends: 683 [2023-02-18 20:24:02,472 INFO L226 Difference]: Without dead ends: 683 [2023-02-18 20:24:02,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:24:02,473 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 837 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:02,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 485 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2023-02-18 20:24:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 343. [2023-02-18 20:24:02,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 265 states have (on average 1.739622641509434) internal successors, (461), 330 states have internal predecessors, (461), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 20:24:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 481 transitions. [2023-02-18 20:24:02,486 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 481 transitions. Word has length 17 [2023-02-18 20:24:02,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:02,487 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 481 transitions. [2023-02-18 20:24:02,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 481 transitions. [2023-02-18 20:24:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 20:24:02,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:02,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:02,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 20:24:02,489 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:02,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash 590215119, now seen corresponding path program 1 times [2023-02-18 20:24:02,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:02,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16875397] [2023-02-18 20:24:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:02,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:02,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:02,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:02,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16875397] [2023-02-18 20:24:02,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16875397] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:02,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:02,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:24:02,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321013296] [2023-02-18 20:24:02,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:02,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:24:02,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:02,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:24:02,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:24:02,632 INFO L87 Difference]: Start difference. First operand 343 states and 481 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:03,140 INFO L93 Difference]: Finished difference Result 898 states and 1078 transitions. [2023-02-18 20:24:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:24:03,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 17 [2023-02-18 20:24:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:03,143 INFO L225 Difference]: With dead ends: 898 [2023-02-18 20:24:03,143 INFO L226 Difference]: Without dead ends: 898 [2023-02-18 20:24:03,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:24:03,144 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 818 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:03,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 616 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 20:24:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2023-02-18 20:24:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 367. [2023-02-18 20:24:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 289 states have (on average 1.7370242214532872) internal successors, (502), 354 states have internal predecessors, (502), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 20:24:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 522 transitions. [2023-02-18 20:24:03,155 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 522 transitions. Word has length 17 [2023-02-18 20:24:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:03,155 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 522 transitions. [2023-02-18 20:24:03,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 522 transitions. [2023-02-18 20:24:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 20:24:03,158 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:03,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:03,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 20:24:03,159 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:03,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1116855082, now seen corresponding path program 1 times [2023-02-18 20:24:03,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:03,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806736142] [2023-02-18 20:24:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:03,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:03,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:03,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:03,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806736142] [2023-02-18 20:24:03,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806736142] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:03,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:03,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 20:24:03,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917421744] [2023-02-18 20:24:03,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:03,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:24:03,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:24:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:24:03,239 INFO L87 Difference]: Start difference. First operand 367 states and 522 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:03,324 INFO L93 Difference]: Finished difference Result 627 states and 874 transitions. [2023-02-18 20:24:03,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:24:03,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 18 [2023-02-18 20:24:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:03,326 INFO L225 Difference]: With dead ends: 627 [2023-02-18 20:24:03,326 INFO L226 Difference]: Without dead ends: 627 [2023-02-18 20:24:03,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:24:03,327 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 239 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:03,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1055 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2023-02-18 20:24:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 387. [2023-02-18 20:24:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 304 states have (on average 1.707236842105263) internal successors, (519), 372 states have internal predecessors, (519), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:03,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 549 transitions. [2023-02-18 20:24:03,336 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 549 transitions. Word has length 18 [2023-02-18 20:24:03,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:03,337 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 549 transitions. [2023-02-18 20:24:03,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 549 transitions. [2023-02-18 20:24:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 20:24:03,337 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:03,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:03,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-18 20:24:03,338 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:03,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:03,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1116857004, now seen corresponding path program 1 times [2023-02-18 20:24:03,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:03,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654963836] [2023-02-18 20:24:03,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:03,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:03,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:03,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:03,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654963836] [2023-02-18 20:24:03,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654963836] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:03,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:03,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 20:24:03,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526718308] [2023-02-18 20:24:03,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:03,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 20:24:03,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 20:24:03,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:24:03,419 INFO L87 Difference]: Start difference. First operand 387 states and 549 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:03,877 INFO L93 Difference]: Finished difference Result 796 states and 1003 transitions. [2023-02-18 20:24:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:24:03,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 18 [2023-02-18 20:24:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:03,880 INFO L225 Difference]: With dead ends: 796 [2023-02-18 20:24:03,880 INFO L226 Difference]: Without dead ends: 796 [2023-02-18 20:24:03,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-18 20:24:03,881 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 802 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:03,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 615 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 20:24:03,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2023-02-18 20:24:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 387. [2023-02-18 20:24:03,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 304 states have (on average 1.707236842105263) internal successors, (519), 372 states have internal predecessors, (519), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 549 transitions. [2023-02-18 20:24:03,889 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 549 transitions. Word has length 18 [2023-02-18 20:24:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:03,889 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 549 transitions. [2023-02-18 20:24:03,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 549 transitions. [2023-02-18 20:24:03,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 20:24:03,890 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:03,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:03,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-18 20:24:03,891 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:03,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:03,891 INFO L85 PathProgramCache]: Analyzing trace with hash 920341577, now seen corresponding path program 1 times [2023-02-18 20:24:03,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:03,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890766253] [2023-02-18 20:24:03,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:03,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:03,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:03,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:03,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890766253] [2023-02-18 20:24:03,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890766253] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:03,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:03,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 20:24:03,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194646113] [2023-02-18 20:24:03,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:03,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 20:24:03,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:03,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 20:24:03,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:24:03,982 INFO L87 Difference]: Start difference. First operand 387 states and 549 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:04,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:04,547 INFO L93 Difference]: Finished difference Result 794 states and 1000 transitions. [2023-02-18 20:24:04,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:24:04,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 18 [2023-02-18 20:24:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:04,550 INFO L225 Difference]: With dead ends: 794 [2023-02-18 20:24:04,550 INFO L226 Difference]: Without dead ends: 794 [2023-02-18 20:24:04,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-18 20:24:04,550 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 537 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:04,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 856 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 20:24:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2023-02-18 20:24:04,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 385. [2023-02-18 20:24:04,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 302 states have (on average 1.7086092715231789) internal successors, (516), 370 states have internal predecessors, (516), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 546 transitions. [2023-02-18 20:24:04,558 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 546 transitions. Word has length 18 [2023-02-18 20:24:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:04,558 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 546 transitions. [2023-02-18 20:24:04,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 546 transitions. [2023-02-18 20:24:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 20:24:04,559 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:04,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:04,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-18 20:24:04,560 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1931813849, now seen corresponding path program 1 times [2023-02-18 20:24:04,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:04,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023588537] [2023-02-18 20:24:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:04,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:04,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 20:24:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:04,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:04,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023588537] [2023-02-18 20:24:04,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023588537] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:04,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:04,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 20:24:04,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386918927] [2023-02-18 20:24:04,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:04,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 20:24:04,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:04,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 20:24:04,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:24:04,690 INFO L87 Difference]: Start difference. First operand 385 states and 546 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:05,081 INFO L93 Difference]: Finished difference Result 737 states and 1015 transitions. [2023-02-18 20:24:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:24:05,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 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 21 [2023-02-18 20:24:05,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:05,084 INFO L225 Difference]: With dead ends: 737 [2023-02-18 20:24:05,084 INFO L226 Difference]: Without dead ends: 737 [2023-02-18 20:24:05,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-18 20:24:05,084 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 504 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:05,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1426 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 20:24:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2023-02-18 20:24:05,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 379. [2023-02-18 20:24:05,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 296 states have (on average 1.7060810810810811) internal successors, (505), 364 states have internal predecessors, (505), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 535 transitions. [2023-02-18 20:24:05,092 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 535 transitions. Word has length 21 [2023-02-18 20:24:05,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:05,092 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 535 transitions. [2023-02-18 20:24:05,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 535 transitions. [2023-02-18 20:24:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 20:24:05,093 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:05,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:05,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-18 20:24:05,094 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:05,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1757289300, now seen corresponding path program 1 times [2023-02-18 20:24:05,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:05,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654828538] [2023-02-18 20:24:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:05,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:05,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:05,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:05,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654828538] [2023-02-18 20:24:05,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654828538] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:05,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:05,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 20:24:05,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818377177] [2023-02-18 20:24:05,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:05,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 20:24:05,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:05,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 20:24:05,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:24:05,195 INFO L87 Difference]: Start difference. First operand 379 states and 535 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:05,455 INFO L93 Difference]: Finished difference Result 538 states and 716 transitions. [2023-02-18 20:24:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:24:05,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 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 21 [2023-02-18 20:24:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:05,457 INFO L225 Difference]: With dead ends: 538 [2023-02-18 20:24:05,457 INFO L226 Difference]: Without dead ends: 538 [2023-02-18 20:24:05,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-02-18 20:24:05,457 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 194 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:05,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 999 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2023-02-18 20:24:05,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 403. [2023-02-18 20:24:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 320 states have (on average 1.671875) internal successors, (535), 384 states have internal predecessors, (535), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 565 transitions. [2023-02-18 20:24:05,464 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 565 transitions. Word has length 21 [2023-02-18 20:24:05,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:05,466 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 565 transitions. [2023-02-18 20:24:05,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 565 transitions. [2023-02-18 20:24:05,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 20:24:05,466 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:05,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:05,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-18 20:24:05,467 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash 206000049, now seen corresponding path program 1 times [2023-02-18 20:24:05,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:05,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786537948] [2023-02-18 20:24:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:05,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:05,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:05,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:05,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786537948] [2023-02-18 20:24:05,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786537948] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:05,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:05,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 20:24:05,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484377946] [2023-02-18 20:24:05,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:05,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:24:05,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:05,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:24:05,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:24:05,529 INFO L87 Difference]: Start difference. First operand 403 states and 565 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:05,597 INFO L93 Difference]: Finished difference Result 646 states and 890 transitions. [2023-02-18 20:24:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:24:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2023-02-18 20:24:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:05,599 INFO L225 Difference]: With dead ends: 646 [2023-02-18 20:24:05,599 INFO L226 Difference]: Without dead ends: 646 [2023-02-18 20:24:05,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:24:05,600 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 236 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:05,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1119 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:05,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2023-02-18 20:24:05,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 401. [2023-02-18 20:24:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 318 states have (on average 1.6635220125786163) internal successors, (529), 382 states have internal predecessors, (529), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 559 transitions. [2023-02-18 20:24:05,608 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 559 transitions. Word has length 22 [2023-02-18 20:24:05,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:05,608 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 559 transitions. [2023-02-18 20:24:05,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 559 transitions. [2023-02-18 20:24:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 20:24:05,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:05,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:05,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-18 20:24:05,611 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:05,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2074565938, now seen corresponding path program 1 times [2023-02-18 20:24:05,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:05,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841074793] [2023-02-18 20:24:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:05,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:05,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:05,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:05,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841074793] [2023-02-18 20:24:05,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841074793] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:05,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:05,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 20:24:05,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109358003] [2023-02-18 20:24:05,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:05,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 20:24:05,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:05,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 20:24:05,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:24:05,739 INFO L87 Difference]: Start difference. First operand 401 states and 559 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:05,992 INFO L93 Difference]: Finished difference Result 574 states and 775 transitions. [2023-02-18 20:24:05,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 20:24:05,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 22 [2023-02-18 20:24:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:05,995 INFO L225 Difference]: With dead ends: 574 [2023-02-18 20:24:05,995 INFO L226 Difference]: Without dead ends: 574 [2023-02-18 20:24:05,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-02-18 20:24:05,996 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 190 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:05,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1103 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:05,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-02-18 20:24:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 403. [2023-02-18 20:24:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 320 states have (on average 1.665625) internal successors, (533), 384 states have internal predecessors, (533), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 563 transitions. [2023-02-18 20:24:06,006 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 563 transitions. Word has length 22 [2023-02-18 20:24:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:06,006 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 563 transitions. [2023-02-18 20:24:06,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 563 transitions. [2023-02-18 20:24:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 20:24:06,007 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:06,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:06,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-18 20:24:06,007 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:06,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:06,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1039595598, now seen corresponding path program 1 times [2023-02-18 20:24:06,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:06,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552187221] [2023-02-18 20:24:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:06,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:06,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 20:24:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:06,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:06,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552187221] [2023-02-18 20:24:06,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552187221] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:06,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:06,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:24:06,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020417453] [2023-02-18 20:24:06,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:06,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:24:06,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:06,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:24:06,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:06,036 INFO L87 Difference]: Start difference. First operand 403 states and 563 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:06,237 INFO L93 Difference]: Finished difference Result 638 states and 826 transitions. [2023-02-18 20:24:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:24:06,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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 23 [2023-02-18 20:24:06,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:06,239 INFO L225 Difference]: With dead ends: 638 [2023-02-18 20:24:06,239 INFO L226 Difference]: Without dead ends: 638 [2023-02-18 20:24:06,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:24:06,240 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 291 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:06,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 424 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:06,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2023-02-18 20:24:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 423. [2023-02-18 20:24:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 340 states have (on average 1.6852941176470588) internal successors, (573), 404 states have internal predecessors, (573), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 603 transitions. [2023-02-18 20:24:06,247 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 603 transitions. Word has length 23 [2023-02-18 20:24:06,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:06,247 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 603 transitions. [2023-02-18 20:24:06,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:06,247 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 603 transitions. [2023-02-18 20:24:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 20:24:06,248 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:06,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:06,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-18 20:24:06,248 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:06,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:06,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1039595597, now seen corresponding path program 1 times [2023-02-18 20:24:06,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:06,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409696083] [2023-02-18 20:24:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:06,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:06,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 20:24:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:06,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:06,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409696083] [2023-02-18 20:24:06,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409696083] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:06,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:06,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:24:06,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855549130] [2023-02-18 20:24:06,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:06,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:24:06,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:06,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:24:06,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:06,288 INFO L87 Difference]: Start difference. First operand 423 states and 603 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:06,441 INFO L93 Difference]: Finished difference Result 475 states and 628 transitions. [2023-02-18 20:24:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:24:06,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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 23 [2023-02-18 20:24:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:06,443 INFO L225 Difference]: With dead ends: 475 [2023-02-18 20:24:06,443 INFO L226 Difference]: Without dead ends: 475 [2023-02-18 20:24:06,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:24:06,444 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 171 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:06,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 410 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:06,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-02-18 20:24:06,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 423. [2023-02-18 20:24:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 340 states have (on average 1.6588235294117648) internal successors, (564), 404 states have internal predecessors, (564), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 594 transitions. [2023-02-18 20:24:06,450 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 594 transitions. Word has length 23 [2023-02-18 20:24:06,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:06,450 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 594 transitions. [2023-02-18 20:24:06,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 594 transitions. [2023-02-18 20:24:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 20:24:06,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:06,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:06,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-18 20:24:06,451 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:06,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:06,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1218800521, now seen corresponding path program 1 times [2023-02-18 20:24:06,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:06,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856282049] [2023-02-18 20:24:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:06,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:06,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:06,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:06,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856282049] [2023-02-18 20:24:06,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856282049] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:06,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:06,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:24:06,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61162509] [2023-02-18 20:24:06,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:06,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:24:06,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:06,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:24:06,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:06,469 INFO L87 Difference]: Start difference. First operand 423 states and 594 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:06,482 INFO L93 Difference]: Finished difference Result 435 states and 606 transitions. [2023-02-18 20:24:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:24:06,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 25 [2023-02-18 20:24:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:06,484 INFO L225 Difference]: With dead ends: 435 [2023-02-18 20:24:06,484 INFO L226 Difference]: Without dead ends: 435 [2023-02-18 20:24:06,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:24:06,485 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 3 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:06,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 523 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:24:06,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-02-18 20:24:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 432. [2023-02-18 20:24:06,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 349 states have (on average 1.6418338108882522) internal successors, (573), 413 states have internal predecessors, (573), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 603 transitions. [2023-02-18 20:24:06,490 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 603 transitions. Word has length 25 [2023-02-18 20:24:06,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:06,490 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 603 transitions. [2023-02-18 20:24:06,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:06,491 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 603 transitions. [2023-02-18 20:24:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 20:24:06,491 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:06,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:06,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-18 20:24:06,491 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:06,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:06,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1220647563, now seen corresponding path program 1 times [2023-02-18 20:24:06,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:06,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574477352] [2023-02-18 20:24:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:06,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:06,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:06,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:06,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574477352] [2023-02-18 20:24:06,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574477352] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:06,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:06,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:24:06,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230256450] [2023-02-18 20:24:06,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:06,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:24:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:06,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:24:06,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:06,525 INFO L87 Difference]: Start difference. First operand 432 states and 603 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:06,714 INFO L93 Difference]: Finished difference Result 732 states and 969 transitions. [2023-02-18 20:24:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:24:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 25 [2023-02-18 20:24:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:06,717 INFO L225 Difference]: With dead ends: 732 [2023-02-18 20:24:06,717 INFO L226 Difference]: Without dead ends: 732 [2023-02-18 20:24:06,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:06,718 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 317 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:06,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 478 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2023-02-18 20:24:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 491. [2023-02-18 20:24:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 409 states have (on average 1.6136919315403424) internal successors, (660), 472 states have internal predecessors, (660), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 690 transitions. [2023-02-18 20:24:06,725 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 690 transitions. Word has length 25 [2023-02-18 20:24:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:06,725 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 690 transitions. [2023-02-18 20:24:06,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 690 transitions. [2023-02-18 20:24:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 20:24:06,726 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:06,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:06,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-18 20:24:06,726 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:06,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:06,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1220647562, now seen corresponding path program 1 times [2023-02-18 20:24:06,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:06,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597822423] [2023-02-18 20:24:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:06,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:06,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:06,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:06,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597822423] [2023-02-18 20:24:06,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597822423] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:06,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:06,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:24:06,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888043662] [2023-02-18 20:24:06,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:06,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:24:06,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:06,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:24:06,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:24:06,746 INFO L87 Difference]: Start difference. First operand 491 states and 690 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:06,847 INFO L93 Difference]: Finished difference Result 574 states and 775 transitions. [2023-02-18 20:24:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:24:06,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 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 25 [2023-02-18 20:24:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:06,849 INFO L225 Difference]: With dead ends: 574 [2023-02-18 20:24:06,849 INFO L226 Difference]: Without dead ends: 574 [2023-02-18 20:24:06,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:24:06,850 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 142 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:06,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 254 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-02-18 20:24:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 488. [2023-02-18 20:24:06,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 409 states have (on average 1.5843520782396088) internal successors, (648), 469 states have internal predecessors, (648), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 678 transitions. [2023-02-18 20:24:06,857 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 678 transitions. Word has length 25 [2023-02-18 20:24:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:06,857 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 678 transitions. [2023-02-18 20:24:06,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 678 transitions. [2023-02-18 20:24:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 20:24:06,857 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:06,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:06,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-18 20:24:06,858 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:06,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:06,858 INFO L85 PathProgramCache]: Analyzing trace with hash 416881146, now seen corresponding path program 1 times [2023-02-18 20:24:06,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:06,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861905235] [2023-02-18 20:24:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:06,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:06,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 20:24:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:06,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:06,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861905235] [2023-02-18 20:24:06,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861905235] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:06,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:06,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 20:24:06,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012111015] [2023-02-18 20:24:06,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:06,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 20:24:06,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:06,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 20:24:06,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:24:06,949 INFO L87 Difference]: Start difference. First operand 488 states and 678 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:07,223 INFO L93 Difference]: Finished difference Result 1115 states and 1544 transitions. [2023-02-18 20:24:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:24:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 26 [2023-02-18 20:24:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:07,226 INFO L225 Difference]: With dead ends: 1115 [2023-02-18 20:24:07,226 INFO L226 Difference]: Without dead ends: 1115 [2023-02-18 20:24:07,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-02-18 20:24:07,227 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 613 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:07,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 1118 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2023-02-18 20:24:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 583. [2023-02-18 20:24:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 504 states have (on average 1.5952380952380953) internal successors, (804), 559 states have internal predecessors, (804), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 18 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 834 transitions. [2023-02-18 20:24:07,238 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 834 transitions. Word has length 26 [2023-02-18 20:24:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:07,238 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 834 transitions. [2023-02-18 20:24:07,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 834 transitions. [2023-02-18 20:24:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 20:24:07,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:07,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:07,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-18 20:24:07,240 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:07,240 INFO L85 PathProgramCache]: Analyzing trace with hash -93653031, now seen corresponding path program 1 times [2023-02-18 20:24:07,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:07,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749554927] [2023-02-18 20:24:07,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:07,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:07,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 20:24:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:07,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:07,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749554927] [2023-02-18 20:24:07,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749554927] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:07,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:07,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 20:24:07,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279972229] [2023-02-18 20:24:07,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:07,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 20:24:07,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:07,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 20:24:07,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:24:07,302 INFO L87 Difference]: Start difference. First operand 583 states and 834 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:07,563 INFO L93 Difference]: Finished difference Result 1112 states and 1534 transitions. [2023-02-18 20:24:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:24:07,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 26 [2023-02-18 20:24:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:07,566 INFO L225 Difference]: With dead ends: 1112 [2023-02-18 20:24:07,566 INFO L226 Difference]: Without dead ends: 1112 [2023-02-18 20:24:07,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-02-18 20:24:07,567 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 518 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:07,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1378 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2023-02-18 20:24:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 485. [2023-02-18 20:24:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 409 states have (on average 1.5599022004889975) internal successors, (638), 466 states have internal predecessors, (638), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:07,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 668 transitions. [2023-02-18 20:24:07,581 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 668 transitions. Word has length 26 [2023-02-18 20:24:07,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:07,581 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 668 transitions. [2023-02-18 20:24:07,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 668 transitions. [2023-02-18 20:24:07,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 20:24:07,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:07,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:07,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-18 20:24:07,582 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:07,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2088228101, now seen corresponding path program 1 times [2023-02-18 20:24:07,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:07,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968015964] [2023-02-18 20:24:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:07,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:07,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:07,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:07,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968015964] [2023-02-18 20:24:07,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968015964] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:07,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:07,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:24:07,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036295486] [2023-02-18 20:24:07,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:07,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:24:07,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:24:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:07,634 INFO L87 Difference]: Start difference. First operand 485 states and 668 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:07,777 INFO L93 Difference]: Finished difference Result 778 states and 1022 transitions. [2023-02-18 20:24:07,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:24:07,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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 26 [2023-02-18 20:24:07,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:07,779 INFO L225 Difference]: With dead ends: 778 [2023-02-18 20:24:07,779 INFO L226 Difference]: Without dead ends: 778 [2023-02-18 20:24:07,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:07,779 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 304 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:07,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 538 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2023-02-18 20:24:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 485. [2023-02-18 20:24:07,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 409 states have (on average 1.5599022004889975) internal successors, (638), 466 states have internal predecessors, (638), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 668 transitions. [2023-02-18 20:24:07,798 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 668 transitions. Word has length 26 [2023-02-18 20:24:07,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:07,799 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 668 transitions. [2023-02-18 20:24:07,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 668 transitions. [2023-02-18 20:24:07,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 20:24:07,799 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:07,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:07,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-18 20:24:07,800 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:07,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1505674617, now seen corresponding path program 1 times [2023-02-18 20:24:07,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:07,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660376927] [2023-02-18 20:24:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:07,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:07,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:07,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660376927] [2023-02-18 20:24:07,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660376927] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:07,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:07,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 20:24:07,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845452527] [2023-02-18 20:24:07,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:07,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:24:07,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:07,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:24:07,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:24:07,854 INFO L87 Difference]: Start difference. First operand 485 states and 668 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:07,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:07,903 INFO L93 Difference]: Finished difference Result 678 states and 911 transitions. [2023-02-18 20:24:07,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:24:07,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 26 [2023-02-18 20:24:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:07,906 INFO L225 Difference]: With dead ends: 678 [2023-02-18 20:24:07,906 INFO L226 Difference]: Without dead ends: 678 [2023-02-18 20:24:07,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:24:07,907 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 226 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:07,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1359 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:24:07,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2023-02-18 20:24:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 424. [2023-02-18 20:24:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 349 states have (on average 1.5587392550143266) internal successors, (544), 405 states have internal predecessors, (544), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 574 transitions. [2023-02-18 20:24:07,915 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 574 transitions. Word has length 26 [2023-02-18 20:24:07,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:07,916 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 574 transitions. [2023-02-18 20:24:07,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:07,916 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 574 transitions. [2023-02-18 20:24:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 20:24:07,916 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:07,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:07,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-18 20:24:07,917 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:07,917 INFO L85 PathProgramCache]: Analyzing trace with hash 38390969, now seen corresponding path program 1 times [2023-02-18 20:24:07,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:07,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568742867] [2023-02-18 20:24:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:07,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:07,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 20:24:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:07,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:07,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568742867] [2023-02-18 20:24:07,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568742867] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:07,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:07,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 20:24:07,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937796380] [2023-02-18 20:24:07,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:07,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 20:24:07,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:07,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 20:24:07,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:24:07,995 INFO L87 Difference]: Start difference. First operand 424 states and 574 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:08,281 INFO L93 Difference]: Finished difference Result 533 states and 684 transitions. [2023-02-18 20:24:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:24:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 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 27 [2023-02-18 20:24:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:08,283 INFO L225 Difference]: With dead ends: 533 [2023-02-18 20:24:08,283 INFO L226 Difference]: Without dead ends: 533 [2023-02-18 20:24:08,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-02-18 20:24:08,284 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 232 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:08,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1108 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 20:24:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-02-18 20:24:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 424. [2023-02-18 20:24:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 349 states have (on average 1.5558739255014327) internal successors, (543), 405 states have internal predecessors, (543), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 573 transitions. [2023-02-18 20:24:08,292 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 573 transitions. Word has length 27 [2023-02-18 20:24:08,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:08,292 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 573 transitions. [2023-02-18 20:24:08,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 573 transitions. [2023-02-18 20:24:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 20:24:08,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:08,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:08,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-18 20:24:08,294 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:08,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:08,294 INFO L85 PathProgramCache]: Analyzing trace with hash 516237483, now seen corresponding path program 1 times [2023-02-18 20:24:08,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:08,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034141092] [2023-02-18 20:24:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:08,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:08,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:08,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:08,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034141092] [2023-02-18 20:24:08,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034141092] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:08,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:08,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 20:24:08,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639342214] [2023-02-18 20:24:08,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:08,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 20:24:08,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:08,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 20:24:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:24:08,338 INFO L87 Difference]: Start difference. First operand 424 states and 573 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:08,460 INFO L93 Difference]: Finished difference Result 615 states and 816 transitions. [2023-02-18 20:24:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:24:08,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 27 [2023-02-18 20:24:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:08,462 INFO L225 Difference]: With dead ends: 615 [2023-02-18 20:24:08,462 INFO L226 Difference]: Without dead ends: 615 [2023-02-18 20:24:08,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-18 20:24:08,463 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 148 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:08,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1170 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:08,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-02-18 20:24:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 454. [2023-02-18 20:24:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 379 states have (on average 1.525065963060686) internal successors, (578), 435 states have internal predecessors, (578), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 608 transitions. [2023-02-18 20:24:08,468 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 608 transitions. Word has length 27 [2023-02-18 20:24:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:08,471 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 608 transitions. [2023-02-18 20:24:08,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 608 transitions. [2023-02-18 20:24:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 20:24:08,472 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:08,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:08,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-18 20:24:08,472 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:08,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:08,473 INFO L85 PathProgramCache]: Analyzing trace with hash 516237677, now seen corresponding path program 1 times [2023-02-18 20:24:08,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:08,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233259240] [2023-02-18 20:24:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:08,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:08,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:08,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:08,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233259240] [2023-02-18 20:24:08,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233259240] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:08,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:08,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:24:08,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190234609] [2023-02-18 20:24:08,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:08,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:24:08,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:24:08,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:08,521 INFO L87 Difference]: Start difference. First operand 454 states and 608 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:08,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:08,645 INFO L93 Difference]: Finished difference Result 776 states and 991 transitions. [2023-02-18 20:24:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:24:08,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 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 27 [2023-02-18 20:24:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:08,647 INFO L225 Difference]: With dead ends: 776 [2023-02-18 20:24:08,647 INFO L226 Difference]: Without dead ends: 776 [2023-02-18 20:24:08,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:08,648 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 379 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:08,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 417 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2023-02-18 20:24:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 544. [2023-02-18 20:24:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 469 states have (on average 1.5053304904051172) internal successors, (706), 525 states have internal predecessors, (706), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 736 transitions. [2023-02-18 20:24:08,655 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 736 transitions. Word has length 27 [2023-02-18 20:24:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:08,655 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 736 transitions. [2023-02-18 20:24:08,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 736 transitions. [2023-02-18 20:24:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 20:24:08,656 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:08,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:08,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-18 20:24:08,656 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1190828282, now seen corresponding path program 1 times [2023-02-18 20:24:08,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:08,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608904133] [2023-02-18 20:24:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:08,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:08,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 20:24:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:08,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:08,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608904133] [2023-02-18 20:24:08,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608904133] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:08,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:08,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 20:24:08,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684222794] [2023-02-18 20:24:08,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:08,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 20:24:08,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 20:24:08,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:24:08,771 INFO L87 Difference]: Start difference. First operand 544 states and 736 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:08,988 INFO L93 Difference]: Finished difference Result 672 states and 860 transitions. [2023-02-18 20:24:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:24:08,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 28 [2023-02-18 20:24:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:08,990 INFO L225 Difference]: With dead ends: 672 [2023-02-18 20:24:08,990 INFO L226 Difference]: Without dead ends: 672 [2023-02-18 20:24:08,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-18 20:24:08,990 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 316 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:08,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 1431 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:08,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2023-02-18 20:24:08,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 427. [2023-02-18 20:24:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 360 states have (on average 1.4916666666666667) internal successors, (537), 414 states have internal predecessors, (537), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 20:24:08,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 555 transitions. [2023-02-18 20:24:08,995 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 555 transitions. Word has length 28 [2023-02-18 20:24:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:08,996 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 555 transitions. [2023-02-18 20:24:08,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 555 transitions. [2023-02-18 20:24:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 20:24:08,996 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:08,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:08,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-18 20:24:08,996 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:08,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1037479271, now seen corresponding path program 1 times [2023-02-18 20:24:08,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:08,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198274089] [2023-02-18 20:24:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:08,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:09,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:09,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:09,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198274089] [2023-02-18 20:24:09,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198274089] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:09,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:09,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:24:09,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819227769] [2023-02-18 20:24:09,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:09,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:24:09,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:09,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:24:09,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:09,043 INFO L87 Difference]: Start difference. First operand 427 states and 555 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:09,161 INFO L93 Difference]: Finished difference Result 619 states and 787 transitions. [2023-02-18 20:24:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:24:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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 28 [2023-02-18 20:24:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:09,163 INFO L225 Difference]: With dead ends: 619 [2023-02-18 20:24:09,163 INFO L226 Difference]: Without dead ends: 619 [2023-02-18 20:24:09,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:24:09,163 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 298 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:09,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 399 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2023-02-18 20:24:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 340. [2023-02-18 20:24:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 274 states have (on average 1.4927007299270072) internal successors, (409), 327 states have internal predecessors, (409), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 20:24:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 427 transitions. [2023-02-18 20:24:09,169 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 427 transitions. Word has length 28 [2023-02-18 20:24:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:09,169 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 427 transitions. [2023-02-18 20:24:09,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 427 transitions. [2023-02-18 20:24:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 20:24:09,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:09,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:09,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-18 20:24:09,170 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:09,170 INFO L85 PathProgramCache]: Analyzing trace with hash -734692199, now seen corresponding path program 1 times [2023-02-18 20:24:09,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:09,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164605410] [2023-02-18 20:24:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:09,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:09,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:09,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:09,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164605410] [2023-02-18 20:24:09,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164605410] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:09,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:09,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:24:09,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982171142] [2023-02-18 20:24:09,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:09,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:24:09,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:09,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:24:09,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:24:09,249 INFO L87 Difference]: Start difference. First operand 340 states and 427 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:09,370 INFO L93 Difference]: Finished difference Result 422 states and 519 transitions. [2023-02-18 20:24:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 20:24:09,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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 35 [2023-02-18 20:24:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:09,372 INFO L225 Difference]: With dead ends: 422 [2023-02-18 20:24:09,372 INFO L226 Difference]: Without dead ends: 422 [2023-02-18 20:24:09,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:24:09,372 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 444 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:09,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 496 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-02-18 20:24:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 339. [2023-02-18 20:24:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 274 states have (on average 1.4854014598540146) internal successors, (407), 326 states have internal predecessors, (407), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 20:24:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 425 transitions. [2023-02-18 20:24:09,377 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 425 transitions. Word has length 35 [2023-02-18 20:24:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:09,377 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 425 transitions. [2023-02-18 20:24:09,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 425 transitions. [2023-02-18 20:24:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 20:24:09,377 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:09,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:09,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-18 20:24:09,377 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:09,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:09,378 INFO L85 PathProgramCache]: Analyzing trace with hash -734692198, now seen corresponding path program 1 times [2023-02-18 20:24:09,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:09,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489732883] [2023-02-18 20:24:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:09,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:09,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:09,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:09,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489732883] [2023-02-18 20:24:09,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489732883] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:09,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:09,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:24:09,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757321127] [2023-02-18 20:24:09,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:09,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:24:09,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:09,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:24:09,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:24:09,492 INFO L87 Difference]: Start difference. First operand 339 states and 425 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:09,587 INFO L93 Difference]: Finished difference Result 338 states and 423 transitions. [2023-02-18 20:24:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 20:24:09,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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 35 [2023-02-18 20:24:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:09,588 INFO L225 Difference]: With dead ends: 338 [2023-02-18 20:24:09,589 INFO L226 Difference]: Without dead ends: 338 [2023-02-18 20:24:09,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:24:09,589 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 472 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:09,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 304 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-02-18 20:24:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2023-02-18 20:24:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 274 states have (on average 1.4781021897810218) internal successors, (405), 325 states have internal predecessors, (405), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 20:24:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 423 transitions. [2023-02-18 20:24:09,602 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 423 transitions. Word has length 35 [2023-02-18 20:24:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:09,602 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 423 transitions. [2023-02-18 20:24:09,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:09,603 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 423 transitions. [2023-02-18 20:24:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 20:24:09,604 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:09,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:09,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-18 20:24:09,604 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563334, now seen corresponding path program 1 times [2023-02-18 20:24:09,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:09,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817933366] [2023-02-18 20:24:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:09,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:09,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:09,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:09,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817933366] [2023-02-18 20:24:09,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817933366] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:09,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:09,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:24:09,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010061040] [2023-02-18 20:24:09,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:09,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 20:24:09,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:09,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 20:24:09,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:24:09,653 INFO L87 Difference]: Start difference. First operand 338 states and 423 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:09,838 INFO L93 Difference]: Finished difference Result 697 states and 848 transitions. [2023-02-18 20:24:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:24:09,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 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 37 [2023-02-18 20:24:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:09,840 INFO L225 Difference]: With dead ends: 697 [2023-02-18 20:24:09,840 INFO L226 Difference]: Without dead ends: 697 [2023-02-18 20:24:09,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:24:09,840 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 354 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:09,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 611 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:09,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2023-02-18 20:24:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 335. [2023-02-18 20:24:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 274 states have (on average 1.4562043795620438) internal successors, (399), 322 states have internal predecessors, (399), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 20:24:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 417 transitions. [2023-02-18 20:24:09,847 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 417 transitions. Word has length 37 [2023-02-18 20:24:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:09,847 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 417 transitions. [2023-02-18 20:24:09,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 417 transitions. [2023-02-18 20:24:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 20:24:09,848 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:09,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:09,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-18 20:24:09,848 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:09,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:09,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563333, now seen corresponding path program 1 times [2023-02-18 20:24:09,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:09,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927016967] [2023-02-18 20:24:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:09,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:09,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:09,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:09,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927016967] [2023-02-18 20:24:09,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927016967] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:09,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:09,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:24:09,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051713547] [2023-02-18 20:24:09,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:09,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:24:09,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:09,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:24:09,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:24:09,927 INFO L87 Difference]: Start difference. First operand 335 states and 417 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:10,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:10,083 INFO L93 Difference]: Finished difference Result 529 states and 656 transitions. [2023-02-18 20:24:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 20:24:10,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 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 37 [2023-02-18 20:24:10,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:10,085 INFO L225 Difference]: With dead ends: 529 [2023-02-18 20:24:10,085 INFO L226 Difference]: Without dead ends: 529 [2023-02-18 20:24:10,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:24:10,086 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 561 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:10,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 395 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:10,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2023-02-18 20:24:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 334. [2023-02-18 20:24:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 274 states have (on average 1.448905109489051) internal successors, (397), 321 states have internal predecessors, (397), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 20:24:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 415 transitions. [2023-02-18 20:24:10,090 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 415 transitions. Word has length 37 [2023-02-18 20:24:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:10,090 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 415 transitions. [2023-02-18 20:24:10,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 415 transitions. [2023-02-18 20:24:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 20:24:10,090 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:10,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:10,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-02-18 20:24:10,090 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:10,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563172, now seen corresponding path program 1 times [2023-02-18 20:24:10,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:10,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890423159] [2023-02-18 20:24:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:10,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:10,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:10,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:10,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890423159] [2023-02-18 20:24:10,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890423159] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:10,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:10,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 20:24:10,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111652252] [2023-02-18 20:24:10,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:10,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 20:24:10,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:10,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 20:24:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:24:10,192 INFO L87 Difference]: Start difference. First operand 334 states and 415 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:10,384 INFO L93 Difference]: Finished difference Result 473 states and 541 transitions. [2023-02-18 20:24:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:24:10,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 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 37 [2023-02-18 20:24:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:10,386 INFO L225 Difference]: With dead ends: 473 [2023-02-18 20:24:10,386 INFO L226 Difference]: Without dead ends: 473 [2023-02-18 20:24:10,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:24:10,387 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 548 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:10,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 305 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-02-18 20:24:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 334. [2023-02-18 20:24:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 274 states have (on average 1.4416058394160585) internal successors, (395), 321 states have internal predecessors, (395), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 20:24:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 413 transitions. [2023-02-18 20:24:10,391 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 413 transitions. Word has length 37 [2023-02-18 20:24:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:10,391 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 413 transitions. [2023-02-18 20:24:10,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:10,391 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 413 transitions. [2023-02-18 20:24:10,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 20:24:10,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:10,391 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:10,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-18 20:24:10,391 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:10,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:10,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1071259938, now seen corresponding path program 1 times [2023-02-18 20:24:10,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:10,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044188198] [2023-02-18 20:24:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:10,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:10,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:10,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:10,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044188198] [2023-02-18 20:24:10,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044188198] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:10,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:10,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 20:24:10,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696314285] [2023-02-18 20:24:10,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:10,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 20:24:10,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:10,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 20:24:10,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-18 20:24:10,608 INFO L87 Difference]: Start difference. First operand 334 states and 413 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:10,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:10,892 INFO L93 Difference]: Finished difference Result 639 states and 791 transitions. [2023-02-18 20:24:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 20:24:10,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 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 48 [2023-02-18 20:24:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:10,894 INFO L225 Difference]: With dead ends: 639 [2023-02-18 20:24:10,894 INFO L226 Difference]: Without dead ends: 639 [2023-02-18 20:24:10,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-02-18 20:24:10,894 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 1118 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:10,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1120 Valid, 615 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2023-02-18 20:24:10,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 334. [2023-02-18 20:24:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 276 states have (on average 1.434782608695652) internal successors, (396), 321 states have internal predecessors, (396), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 20:24:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 414 transitions. [2023-02-18 20:24:10,899 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 414 transitions. Word has length 48 [2023-02-18 20:24:10,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:10,899 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 414 transitions. [2023-02-18 20:24:10,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:10,899 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 414 transitions. [2023-02-18 20:24:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 20:24:10,899 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:10,899 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:10,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-02-18 20:24:10,899 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:10,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:10,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1071260000, now seen corresponding path program 1 times [2023-02-18 20:24:10,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:10,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66924230] [2023-02-18 20:24:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:10,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:11,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:11,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:11,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66924230] [2023-02-18 20:24:11,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66924230] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:11,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:11,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:24:11,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593440717] [2023-02-18 20:24:11,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:11,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:24:11,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:11,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:24:11,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:24:11,010 INFO L87 Difference]: Start difference. First operand 334 states and 414 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:11,116 INFO L93 Difference]: Finished difference Result 349 states and 427 transitions. [2023-02-18 20:24:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:24:11,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 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 48 [2023-02-18 20:24:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:11,118 INFO L225 Difference]: With dead ends: 349 [2023-02-18 20:24:11,118 INFO L226 Difference]: Without dead ends: 349 [2023-02-18 20:24:11,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:24:11,119 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 293 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:11,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 273 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-02-18 20:24:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 331. [2023-02-18 20:24:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 274 states have (on average 1.427007299270073) internal successors, (391), 318 states have internal predecessors, (391), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 20:24:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 409 transitions. [2023-02-18 20:24:11,124 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 409 transitions. Word has length 48 [2023-02-18 20:24:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:11,125 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 409 transitions. [2023-02-18 20:24:11,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 409 transitions. [2023-02-18 20:24:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 20:24:11,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:11,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:11,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-02-18 20:24:11,126 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:11,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash 122043664, now seen corresponding path program 1 times [2023-02-18 20:24:11,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:11,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701365825] [2023-02-18 20:24:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:11,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:11,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:11,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 20:24:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 20:24:11,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:11,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701365825] [2023-02-18 20:24:11,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701365825] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:11,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:11,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 20:24:11,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870693252] [2023-02-18 20:24:11,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:11,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 20:24:11,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:11,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 20:24:11,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:24:11,255 INFO L87 Difference]: Start difference. First operand 331 states and 409 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 20:24:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:11,567 INFO L93 Difference]: Finished difference Result 717 states and 873 transitions. [2023-02-18 20:24:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 20:24:11,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-02-18 20:24:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:11,570 INFO L225 Difference]: With dead ends: 717 [2023-02-18 20:24:11,570 INFO L226 Difference]: Without dead ends: 717 [2023-02-18 20:24:11,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2023-02-18 20:24:11,570 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 689 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:11,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 617 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 20:24:11,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-02-18 20:24:11,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 329. [2023-02-18 20:24:11,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 274 states have (on average 1.4124087591240877) internal successors, (387), 316 states have internal predecessors, (387), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 20:24:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 405 transitions. [2023-02-18 20:24:11,575 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 405 transitions. Word has length 50 [2023-02-18 20:24:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:11,575 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 405 transitions. [2023-02-18 20:24:11,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 20:24:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 405 transitions. [2023-02-18 20:24:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 20:24:11,576 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:11,576 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:11,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-02-18 20:24:11,576 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:11,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:11,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1996957779, now seen corresponding path program 1 times [2023-02-18 20:24:11,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:11,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615294506] [2023-02-18 20:24:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:11,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:11,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:11,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:11,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615294506] [2023-02-18 20:24:11,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615294506] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:11,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:11,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 20:24:11,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721994637] [2023-02-18 20:24:11,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:11,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 20:24:11,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:11,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 20:24:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-18 20:24:11,883 INFO L87 Difference]: Start difference. First operand 329 states and 405 transitions. Second operand has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:12,714 INFO L93 Difference]: Finished difference Result 1069 states and 1312 transitions. [2023-02-18 20:24:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 20:24:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 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 51 [2023-02-18 20:24:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:12,716 INFO L225 Difference]: With dead ends: 1069 [2023-02-18 20:24:12,717 INFO L226 Difference]: Without dead ends: 1069 [2023-02-18 20:24:12,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2023-02-18 20:24:12,717 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 1068 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:12,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 1763 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 20:24:12,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2023-02-18 20:24:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 475. [2023-02-18 20:24:12,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 413 states have (on average 1.3995157384987893) internal successors, (578), 458 states have internal predecessors, (578), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-02-18 20:24:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 608 transitions. [2023-02-18 20:24:12,725 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 608 transitions. Word has length 51 [2023-02-18 20:24:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:12,726 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 608 transitions. [2023-02-18 20:24:12,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 608 transitions. [2023-02-18 20:24:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 20:24:12,726 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:12,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:12,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-02-18 20:24:12,726 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:12,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:12,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1996957778, now seen corresponding path program 1 times [2023-02-18 20:24:12,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:12,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255284330] [2023-02-18 20:24:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:12,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:13,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:13,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:13,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255284330] [2023-02-18 20:24:13,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255284330] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:13,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:13,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 20:24:13,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058275033] [2023-02-18 20:24:13,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:13,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 20:24:13,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:13,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 20:24:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-18 20:24:13,091 INFO L87 Difference]: Start difference. First operand 475 states and 608 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:13,900 INFO L93 Difference]: Finished difference Result 1038 states and 1285 transitions. [2023-02-18 20:24:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 20:24:13,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 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 51 [2023-02-18 20:24:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:13,903 INFO L225 Difference]: With dead ends: 1038 [2023-02-18 20:24:13,903 INFO L226 Difference]: Without dead ends: 1038 [2023-02-18 20:24:13,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2023-02-18 20:24:13,904 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 1091 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:13,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1092 Valid, 1626 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 20:24:13,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2023-02-18 20:24:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 528. [2023-02-18 20:24:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 462 states have (on average 1.422077922077922) internal successors, (657), 509 states have internal predecessors, (657), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-02-18 20:24:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 693 transitions. [2023-02-18 20:24:13,913 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 693 transitions. Word has length 51 [2023-02-18 20:24:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:13,913 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 693 transitions. [2023-02-18 20:24:13,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 693 transitions. [2023-02-18 20:24:13,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 20:24:13,913 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:13,914 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:13,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-02-18 20:24:13,914 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:13,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1995110737, now seen corresponding path program 1 times [2023-02-18 20:24:13,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:13,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334956076] [2023-02-18 20:24:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:13,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:14,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:14,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:14,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334956076] [2023-02-18 20:24:14,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334956076] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:14,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:14,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 20:24:14,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107580910] [2023-02-18 20:24:14,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:14,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 20:24:14,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:14,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 20:24:14,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-18 20:24:14,307 INFO L87 Difference]: Start difference. First operand 528 states and 693 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:14,641 INFO L93 Difference]: Finished difference Result 558 states and 724 transitions. [2023-02-18 20:24:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 20:24:14,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 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 51 [2023-02-18 20:24:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:14,643 INFO L225 Difference]: With dead ends: 558 [2023-02-18 20:24:14,643 INFO L226 Difference]: Without dead ends: 558 [2023-02-18 20:24:14,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-02-18 20:24:14,644 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 116 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:14,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 819 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:24:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2023-02-18 20:24:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 548. [2023-02-18 20:24:14,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 482 states have (on average 1.4066390041493777) internal successors, (678), 529 states have internal predecessors, (678), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-02-18 20:24:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 714 transitions. [2023-02-18 20:24:14,649 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 714 transitions. Word has length 51 [2023-02-18 20:24:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:14,649 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 714 transitions. [2023-02-18 20:24:14,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 714 transitions. [2023-02-18 20:24:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 20:24:14,650 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:14,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:14,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-02-18 20:24:14,650 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:14,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1849312878, now seen corresponding path program 1 times [2023-02-18 20:24:14,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:14,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496689742] [2023-02-18 20:24:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:14,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:14,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:14,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:14,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496689742] [2023-02-18 20:24:14,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496689742] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:14,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:14,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 20:24:14,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921217682] [2023-02-18 20:24:14,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:14,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 20:24:14,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 20:24:14,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 20:24:14,731 INFO L87 Difference]: Start difference. First operand 548 states and 714 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:14,795 INFO L93 Difference]: Finished difference Result 774 states and 996 transitions. [2023-02-18 20:24:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 20:24:14,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 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 51 [2023-02-18 20:24:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:14,804 INFO L225 Difference]: With dead ends: 774 [2023-02-18 20:24:14,804 INFO L226 Difference]: Without dead ends: 774 [2023-02-18 20:24:14,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:24:14,805 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 202 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:14,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1191 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2023-02-18 20:24:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 548. [2023-02-18 20:24:14,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 482 states have (on average 1.400414937759336) internal successors, (675), 529 states have internal predecessors, (675), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-02-18 20:24:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 711 transitions. [2023-02-18 20:24:14,813 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 711 transitions. Word has length 51 [2023-02-18 20:24:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:14,813 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 711 transitions. [2023-02-18 20:24:14,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 711 transitions. [2023-02-18 20:24:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 20:24:14,813 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:14,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:14,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-02-18 20:24:14,814 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:14,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:14,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1999969648, now seen corresponding path program 1 times [2023-02-18 20:24:14,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:14,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233582039] [2023-02-18 20:24:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:14,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:15,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:15,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:15,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233582039] [2023-02-18 20:24:15,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233582039] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:15,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:15,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 20:24:15,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116613017] [2023-02-18 20:24:15,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:15,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 20:24:15,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 20:24:15,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-18 20:24:15,093 INFO L87 Difference]: Start difference. First operand 548 states and 711 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:15,949 INFO L93 Difference]: Finished difference Result 1280 states and 1589 transitions. [2023-02-18 20:24:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 20:24:15,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 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 52 [2023-02-18 20:24:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:15,952 INFO L225 Difference]: With dead ends: 1280 [2023-02-18 20:24:15,952 INFO L226 Difference]: Without dead ends: 1280 [2023-02-18 20:24:15,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2023-02-18 20:24:15,952 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 1244 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:15,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1246 Valid, 1424 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 20:24:15,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2023-02-18 20:24:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 611. [2023-02-18 20:24:15,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 537 states have (on average 1.398510242085661) internal successors, (751), 588 states have internal predecessors, (751), 16 states have call successors, (16), 8 states have call predecessors, (16), 16 states have return successors, (32), 14 states have call predecessors, (32), 16 states have call successors, (32) [2023-02-18 20:24:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 799 transitions. [2023-02-18 20:24:15,963 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 799 transitions. Word has length 52 [2023-02-18 20:24:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:15,963 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 799 transitions. [2023-02-18 20:24:15,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 799 transitions. [2023-02-18 20:24:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 20:24:15,964 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:15,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:15,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-02-18 20:24:15,964 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:15,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1999969647, now seen corresponding path program 1 times [2023-02-18 20:24:15,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:15,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329926973] [2023-02-18 20:24:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:15,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:16,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:16,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:16,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329926973] [2023-02-18 20:24:16,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329926973] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:16,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:16,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 20:24:16,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231739956] [2023-02-18 20:24:16,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:16,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 20:24:16,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:16,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 20:24:16,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-18 20:24:16,349 INFO L87 Difference]: Start difference. First operand 611 states and 799 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:17,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:17,087 INFO L93 Difference]: Finished difference Result 1237 states and 1539 transitions. [2023-02-18 20:24:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 20:24:17,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 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 52 [2023-02-18 20:24:17,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:17,091 INFO L225 Difference]: With dead ends: 1237 [2023-02-18 20:24:17,091 INFO L226 Difference]: Without dead ends: 1237 [2023-02-18 20:24:17,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2023-02-18 20:24:17,100 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 1077 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:17,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 1276 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 20:24:17,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2023-02-18 20:24:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 552. [2023-02-18 20:24:17,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 486 states have (on average 1.397119341563786) internal successors, (679), 533 states have internal predecessors, (679), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-02-18 20:24:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 715 transitions. [2023-02-18 20:24:17,127 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 715 transitions. Word has length 52 [2023-02-18 20:24:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:17,127 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 715 transitions. [2023-02-18 20:24:17,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:17,128 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 715 transitions. [2023-02-18 20:24:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 20:24:17,129 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:17,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:17,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-02-18 20:24:17,129 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:17,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1998122606, now seen corresponding path program 1 times [2023-02-18 20:24:17,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:17,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119441068] [2023-02-18 20:24:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:17,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:17,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:17,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:17,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119441068] [2023-02-18 20:24:17,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119441068] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:17,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:17,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 20:24:17,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563578006] [2023-02-18 20:24:17,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:17,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 20:24:17,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:17,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 20:24:17,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-18 20:24:17,321 INFO L87 Difference]: Start difference. First operand 552 states and 715 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:17,819 INFO L93 Difference]: Finished difference Result 982 states and 1269 transitions. [2023-02-18 20:24:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 20:24:17,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 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 52 [2023-02-18 20:24:17,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:17,821 INFO L225 Difference]: With dead ends: 982 [2023-02-18 20:24:17,821 INFO L226 Difference]: Without dead ends: 982 [2023-02-18 20:24:17,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-18 20:24:17,822 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 952 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:17,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 921 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 20:24:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2023-02-18 20:24:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 665. [2023-02-18 20:24:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 583 states have (on average 1.397941680960549) internal successors, (815), 638 states have internal predecessors, (815), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 16 states have call predecessors, (40), 20 states have call successors, (40) [2023-02-18 20:24:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 875 transitions. [2023-02-18 20:24:17,832 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 875 transitions. Word has length 52 [2023-02-18 20:24:17,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:17,833 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 875 transitions. [2023-02-18 20:24:17,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:17,833 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 875 transitions. [2023-02-18 20:24:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 20:24:17,833 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:17,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:17,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-02-18 20:24:17,834 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:17,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1998122605, now seen corresponding path program 1 times [2023-02-18 20:24:17,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:17,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120594194] [2023-02-18 20:24:17,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:17,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:18,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:18,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:18,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120594194] [2023-02-18 20:24:18,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120594194] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:18,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:18,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 20:24:18,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241746489] [2023-02-18 20:24:18,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:18,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 20:24:18,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 20:24:18,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 20:24:18,090 INFO L87 Difference]: Start difference. First operand 665 states and 875 transitions. Second operand has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:18,534 INFO L93 Difference]: Finished difference Result 973 states and 1271 transitions. [2023-02-18 20:24:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 20:24:18,535 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 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 52 [2023-02-18 20:24:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:18,536 INFO L225 Difference]: With dead ends: 973 [2023-02-18 20:24:18,536 INFO L226 Difference]: Without dead ends: 973 [2023-02-18 20:24:18,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-02-18 20:24:18,538 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 1096 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:18,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 747 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 20:24:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2023-02-18 20:24:18,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 754. [2023-02-18 20:24:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 664 states have (on average 1.4292168674698795) internal successors, (949), 723 states have internal predecessors, (949), 24 states have call successors, (24), 12 states have call predecessors, (24), 24 states have return successors, (48), 18 states have call predecessors, (48), 24 states have call successors, (48) [2023-02-18 20:24:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1021 transitions. [2023-02-18 20:24:18,548 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1021 transitions. Word has length 52 [2023-02-18 20:24:18,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:18,548 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1021 transitions. [2023-02-18 20:24:18,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 20:24:18,548 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1021 transitions. [2023-02-18 20:24:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 20:24:18,549 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:18,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:18,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-02-18 20:24:18,549 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:18,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:18,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1226479758, now seen corresponding path program 1 times [2023-02-18 20:24:18,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:18,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264508273] [2023-02-18 20:24:18,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:18,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:18,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:18,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-18 20:24:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 20:24:18,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:18,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264508273] [2023-02-18 20:24:18,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264508273] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:24:18,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:24:18,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 20:24:18,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024805714] [2023-02-18 20:24:18,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:24:18,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 20:24:18,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:24:18,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 20:24:18,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-02-18 20:24:18,660 INFO L87 Difference]: Start difference. First operand 754 states and 1021 transitions. Second operand has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 20:24:18,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:24:18,792 INFO L93 Difference]: Finished difference Result 1016 states and 1345 transitions. [2023-02-18 20:24:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 20:24:18,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2023-02-18 20:24:18,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:24:18,795 INFO L225 Difference]: With dead ends: 1016 [2023-02-18 20:24:18,795 INFO L226 Difference]: Without dead ends: 1016 [2023-02-18 20:24:18,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:24:18,796 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 545 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:24:18,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 275 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:24:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2023-02-18 20:24:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 753. [2023-02-18 20:24:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 664 states have (on average 1.4126506024096386) internal successors, (938), 722 states have internal predecessors, (938), 24 states have call successors, (24), 12 states have call predecessors, (24), 24 states have return successors, (48), 18 states have call predecessors, (48), 24 states have call successors, (48) [2023-02-18 20:24:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1010 transitions. [2023-02-18 20:24:18,815 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1010 transitions. Word has length 53 [2023-02-18 20:24:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:24:18,815 INFO L495 AbstractCegarLoop]: Abstraction has 753 states and 1010 transitions. [2023-02-18 20:24:18,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 20:24:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1010 transitions. [2023-02-18 20:24:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 20:24:18,816 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:24:18,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:24:18,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-02-18 20:24:18,816 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 20:24:18,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:24:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1818456665, now seen corresponding path program 1 times [2023-02-18 20:24:18,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:24:18,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518294615] [2023-02-18 20:24:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:18,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:24:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:19,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 20:24:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:24:19,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:24:19,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518294615] [2023-02-18 20:24:19,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518294615] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:24:19,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056727281] [2023-02-18 20:24:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:24:19,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:24:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:24:19,263 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:24:19,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 20:24:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:24:19,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-18 20:24:19,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:24:19,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:24:19,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-18 20:24:19,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 20:24:19,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 20:24:19,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 20:24:19,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 20:24:19,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 20:24:19,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 20:24:19,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:24:19,713 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 19 treesize of output 34 [2023-02-18 20:24:19,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:24:19,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 34 [2023-02-18 20:24:20,128 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 20:24:20,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:24:20,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 224 treesize of output 244 [2023-02-18 20:24:20,140 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 20:24:20,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:24:20,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 156 treesize of output 212