./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0214_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext-properties/test-0214_1.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 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-15 01:12:29,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 01:12:29,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 01:12:29,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 01:12:29,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 01:12:29,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 01:12:29,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 01:12:29,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 01:12:29,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 01:12:29,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 01:12:29,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 01:12:29,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 01:12:29,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 01:12:29,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 01:12:29,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 01:12:29,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 01:12:29,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 01:12:29,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 01:12:29,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 01:12:29,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 01:12:29,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 01:12:29,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 01:12:29,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 01:12:29,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 01:12:29,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 01:12:29,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 01:12:29,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 01:12:29,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 01:12:29,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 01:12:29,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 01:12:29,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 01:12:29,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 01:12:29,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 01:12:29,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 01:12:29,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 01:12:29,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 01:12:29,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 01:12:29,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 01:12:29,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 01:12:29,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 01:12:29,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 01:12:29,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 01:12:29,228 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 01:12:29,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 01:12:29,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 01:12:29,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 01:12:29,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 01:12:29,245 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 01:12:29,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 01:12:29,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 01:12:29,246 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 01:12:29,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 01:12:29,246 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 01:12:29,247 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 01:12:29,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 01:12:29,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 01:12:29,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 01:12:29,247 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 01:12:29,247 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 01:12:29,247 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 01:12:29,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 01:12:29,248 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 01:12:29,248 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 01:12:29,248 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 01:12:29,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 01:12:29,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 01:12:29,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 01:12:29,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 01:12:29,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 01:12:29,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 01:12:29,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 01:12:29,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 01:12:29,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 01:12:29,249 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 01:12:29,250 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 01:12:29,250 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 01:12:29,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2023-02-15 01:12:29,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 01:12:29,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 01:12:29,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 01:12:29,475 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 01:12:29,476 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 01:12:29,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2023-02-15 01:12:30,415 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 01:12:30,650 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 01:12:30,650 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2023-02-15 01:12:30,664 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de7754f7f/419a276e64454774890946067c15a472/FLAGd55cfef0b [2023-02-15 01:12:30,673 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de7754f7f/419a276e64454774890946067c15a472 [2023-02-15 01:12:30,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 01:12:30,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 01:12:30,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 01:12:30,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 01:12:30,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 01:12:30,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:12:30" (1/1) ... [2023-02-15 01:12:30,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76730b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:30, skipping insertion in model container [2023-02-15 01:12:30,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:12:30" (1/1) ... [2023-02-15 01:12:30,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 01:12:30,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 01:12:30,965 WARN L623 FunctionHandler]: Unknown extern function abort [2023-02-15 01:12:30,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 01:12:31,006 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 01:12:31,039 WARN L623 FunctionHandler]: Unknown extern function abort [2023-02-15 01:12:31,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 01:12:31,084 INFO L208 MainTranslator]: Completed translation [2023-02-15 01:12:31,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31 WrapperNode [2023-02-15 01:12:31,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 01:12:31,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 01:12:31,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 01:12:31,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 01:12:31,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31" (1/1) ... [2023-02-15 01:12:31,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31" (1/1) ... [2023-02-15 01:12:31,143 INFO L138 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 215 [2023-02-15 01:12:31,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 01:12:31,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 01:12:31,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 01:12:31,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 01:12:31,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31" (1/1) ... [2023-02-15 01:12:31,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31" (1/1) ... [2023-02-15 01:12:31,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31" (1/1) ... [2023-02-15 01:12:31,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31" (1/1) ... [2023-02-15 01:12:31,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31" (1/1) ... [2023-02-15 01:12:31,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31" (1/1) ... [2023-02-15 01:12:31,181 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31" (1/1) ... [2023-02-15 01:12:31,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31" (1/1) ... [2023-02-15 01:12:31,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 01:12:31,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 01:12:31,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 01:12:31,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 01:12:31,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31" (1/1) ... [2023-02-15 01:12:31,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 01:12:31,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:12:31,228 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) [2023-02-15 01:12:31,248 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 [2023-02-15 01:12:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-02-15 01:12:31,257 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-02-15 01:12:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 01:12:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 01:12:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 01:12:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 01:12:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 01:12:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 01:12:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 01:12:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 01:12:31,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 01:12:31,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 01:12:31,398 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 01:12:31,399 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 01:12:31,785 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 01:12:31,790 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 01:12:31,790 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 01:12:31,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:12:31 BoogieIcfgContainer [2023-02-15 01:12:31,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 01:12:31,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 01:12:31,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 01:12:31,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 01:12:31,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:12:30" (1/3) ... [2023-02-15 01:12:31,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adcc044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:12:31, skipping insertion in model container [2023-02-15 01:12:31,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:31" (2/3) ... [2023-02-15 01:12:31,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adcc044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:12:31, skipping insertion in model container [2023-02-15 01:12:31,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:12:31" (3/3) ... [2023-02-15 01:12:31,798 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2023-02-15 01:12:31,810 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 01:12:31,810 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2023-02-15 01:12:31,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 01:12:31,842 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;@31941c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 01:12:31,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-02-15 01:12:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 86 states have (on average 1.941860465116279) internal successors, (167), 143 states have internal predecessors, (167), 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) [2023-02-15 01:12:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 01:12:31,856 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:31,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 01:12:31,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:31,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1044165707, now seen corresponding path program 1 times [2023-02-15 01:12:31,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:31,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90306182] [2023-02-15 01:12:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:31,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:31,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:31,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90306182] [2023-02-15 01:12:31,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90306182] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:31,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:31,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:12:32,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390924645] [2023-02-15 01:12:32,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:32,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 01:12:32,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:32,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 01:12:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 01:12:32,036 INFO L87 Difference]: Start difference. First operand has 147 states, 86 states have (on average 1.941860465116279) internal successors, (167), 143 states have internal predecessors, (167), 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) [2023-02-15 01:12:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:32,067 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2023-02-15 01:12:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 01:12:32,069 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 [2023-02-15 01:12:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:32,076 INFO L225 Difference]: With dead ends: 147 [2023-02-15 01:12:32,077 INFO L226 Difference]: Without dead ends: 144 [2023-02-15 01:12:32,078 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 [2023-02-15 01:12:32,080 INFO L413 NwaCegarLoop]: 166 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, 166 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 [2023-02-15 01:12:32,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:12:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-15 01:12:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-02-15 01:12:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 84 states have (on average 1.880952380952381) internal successors, (158), 140 states have internal predecessors, (158), 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) [2023-02-15 01:12:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2023-02-15 01:12:32,110 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 6 [2023-02-15 01:12:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:32,110 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2023-02-15 01:12:32,110 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) [2023-02-15 01:12:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2023-02-15 01:12:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 01:12:32,110 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:32,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:32,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 01:12:32,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:32,112 INFO L85 PathProgramCache]: Analyzing trace with hash 594325856, now seen corresponding path program 1 times [2023-02-15 01:12:32,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:32,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627393773] [2023-02-15 01:12:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:32,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:32,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627393773] [2023-02-15 01:12:32,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627393773] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:32,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:32,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:12:32,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495325927] [2023-02-15 01:12:32,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:32,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:12:32,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:32,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:12:32,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:12:32,188 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-02-15 01:12:32,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:32,246 INFO L93 Difference]: Finished difference Result 286 states and 321 transitions. [2023-02-15 01:12:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:12:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2023-02-15 01:12:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:32,251 INFO L225 Difference]: With dead ends: 286 [2023-02-15 01:12:32,254 INFO L226 Difference]: Without dead ends: 286 [2023-02-15 01:12:32,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:12:32,256 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 158 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:32,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 467 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:12:32,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-02-15 01:12:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 146. [2023-02-15 01:12:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 86 states have (on average 1.8604651162790697) internal successors, (160), 142 states have internal predecessors, (160), 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) [2023-02-15 01:12:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 164 transitions. [2023-02-15 01:12:32,269 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 164 transitions. Word has length 8 [2023-02-15 01:12:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:32,270 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 164 transitions. [2023-02-15 01:12:32,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-02-15 01:12:32,270 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 164 transitions. [2023-02-15 01:12:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 01:12:32,270 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:32,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:32,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 01:12:32,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:32,272 INFO L85 PathProgramCache]: Analyzing trace with hash 592478814, now seen corresponding path program 1 times [2023-02-15 01:12:32,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:32,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347426706] [2023-02-15 01:12:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:32,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:32,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:32,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347426706] [2023-02-15 01:12:32,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347426706] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:32,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:32,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:12:32,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814772838] [2023-02-15 01:12:32,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:32,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:12:32,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:32,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:12:32,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:12:32,389 INFO L87 Difference]: Start difference. First operand 146 states and 164 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-02-15 01:12:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:32,582 INFO L93 Difference]: Finished difference Result 266 states and 297 transitions. [2023-02-15 01:12:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:12:32,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2023-02-15 01:12:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:32,586 INFO L225 Difference]: With dead ends: 266 [2023-02-15 01:12:32,586 INFO L226 Difference]: Without dead ends: 266 [2023-02-15 01:12:32,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:12:32,591 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:32,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 350 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:32,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-02-15 01:12:32,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 198. [2023-02-15 01:12:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 135 states have (on average 1.8592592592592592) internal successors, (251), 192 states have internal predecessors, (251), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:12:32,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2023-02-15 01:12:32,611 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 8 [2023-02-15 01:12:32,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:32,631 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2023-02-15 01:12:32,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-02-15 01:12:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2023-02-15 01:12:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 01:12:32,633 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:32,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:32,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 01:12:32,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:32,635 INFO L85 PathProgramCache]: Analyzing trace with hash 592478813, now seen corresponding path program 1 times [2023-02-15 01:12:32,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:32,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60336106] [2023-02-15 01:12:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:32,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:32,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:32,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60336106] [2023-02-15 01:12:32,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60336106] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:32,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:32,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-15 01:12:32,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109391198] [2023-02-15 01:12:32,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:32,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:12:32,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:32,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:12:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:12:32,713 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2023-02-15 01:12:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:32,828 INFO L93 Difference]: Finished difference Result 381 states and 498 transitions. [2023-02-15 01:12:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:12:32,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2023-02-15 01:12:32,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:32,831 INFO L225 Difference]: With dead ends: 381 [2023-02-15 01:12:32,831 INFO L226 Difference]: Without dead ends: 381 [2023-02-15 01:12:32,832 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 [2023-02-15 01:12:32,849 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 142 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:32,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 211 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-02-15 01:12:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 280. [2023-02-15 01:12:32,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 211 states have (on average 1.8056872037914693) internal successors, (381), 269 states have internal predecessors, (381), 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) [2023-02-15 01:12:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 397 transitions. [2023-02-15 01:12:32,867 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 397 transitions. Word has length 8 [2023-02-15 01:12:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:32,867 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 397 transitions. [2023-02-15 01:12:32,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2023-02-15 01:12:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 397 transitions. [2023-02-15 01:12:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 01:12:32,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:32,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:32,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 01:12:32,868 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:32,870 INFO L85 PathProgramCache]: Analyzing trace with hash 592478876, now seen corresponding path program 1 times [2023-02-15 01:12:32,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:32,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516160988] [2023-02-15 01:12:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:32,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:32,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:32,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516160988] [2023-02-15 01:12:32,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516160988] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:32,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:32,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:12:32,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683846451] [2023-02-15 01:12:32,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:32,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:12:32,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:32,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:12:32,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:12:32,946 INFO L87 Difference]: Start difference. First operand 280 states and 397 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-02-15 01:12:33,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:33,056 INFO L93 Difference]: Finished difference Result 351 states and 440 transitions. [2023-02-15 01:12:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:12:33,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2023-02-15 01:12:33,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:33,058 INFO L225 Difference]: With dead ends: 351 [2023-02-15 01:12:33,058 INFO L226 Difference]: Without dead ends: 351 [2023-02-15 01:12:33,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:12:33,060 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 127 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:33,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 365 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:33,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-02-15 01:12:33,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 280. [2023-02-15 01:12:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 211 states have (on average 1.8056872037914693) internal successors, (381), 269 states have internal predecessors, (381), 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) [2023-02-15 01:12:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 397 transitions. [2023-02-15 01:12:33,073 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 397 transitions. Word has length 8 [2023-02-15 01:12:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:33,073 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 397 transitions. [2023-02-15 01:12:33,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-02-15 01:12:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 397 transitions. [2023-02-15 01:12:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 01:12:33,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:33,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:33,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 01:12:33,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:33,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:33,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1779058665, now seen corresponding path program 1 times [2023-02-15 01:12:33,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:33,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46773523] [2023-02-15 01:12:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:33,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:33,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46773523] [2023-02-15 01:12:33,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46773523] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:33,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:33,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:12:33,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036715802] [2023-02-15 01:12:33,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:33,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:12:33,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:33,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:12:33,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:12:33,135 INFO L87 Difference]: Start difference. First operand 280 states and 397 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) 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) [2023-02-15 01:12:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:33,145 INFO L93 Difference]: Finished difference Result 383 states and 497 transitions. [2023-02-15 01:12:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:12:33,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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 [2023-02-15 01:12:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:33,147 INFO L225 Difference]: With dead ends: 383 [2023-02-15 01:12:33,147 INFO L226 Difference]: Without dead ends: 383 [2023-02-15 01:12:33,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:12:33,148 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 133 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:33,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 316 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:12:33,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-15 01:12:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 282. [2023-02-15 01:12:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 213 states have (on average 1.7887323943661972) internal successors, (381), 271 states have internal predecessors, (381), 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) [2023-02-15 01:12:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 397 transitions. [2023-02-15 01:12:33,154 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 397 transitions. Word has length 11 [2023-02-15 01:12:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:33,155 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 397 transitions. [2023-02-15 01:12:33,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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) [2023-02-15 01:12:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 397 transitions. [2023-02-15 01:12:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 01:12:33,156 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:33,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:33,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 01:12:33,156 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:33,157 INFO L85 PathProgramCache]: Analyzing trace with hash 683754949, now seen corresponding path program 1 times [2023-02-15 01:12:33,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:33,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829993167] [2023-02-15 01:12:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:33,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:33,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:33,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829993167] [2023-02-15 01:12:33,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829993167] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:33,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:33,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:12:33,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844796014] [2023-02-15 01:12:33,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:33,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:12:33,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:33,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:12:33,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:12:33,192 INFO L87 Difference]: Start difference. First operand 282 states and 397 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-02-15 01:12:33,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:33,255 INFO L93 Difference]: Finished difference Result 337 states and 448 transitions. [2023-02-15 01:12:33,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:12:33,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2023-02-15 01:12:33,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:33,257 INFO L225 Difference]: With dead ends: 337 [2023-02-15 01:12:33,257 INFO L226 Difference]: Without dead ends: 330 [2023-02-15 01:12:33,257 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 [2023-02-15 01:12:33,258 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 75 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:33,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 239 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-15 01:12:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 279. [2023-02-15 01:12:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 210 states have (on average 1.7904761904761906) internal successors, (376), 268 states have internal predecessors, (376), 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) [2023-02-15 01:12:33,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 392 transitions. [2023-02-15 01:12:33,263 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 392 transitions. Word has length 12 [2023-02-15 01:12:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:33,263 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 392 transitions. [2023-02-15 01:12:33,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-02-15 01:12:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 392 transitions. [2023-02-15 01:12:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 01:12:33,264 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:33,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:33,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 01:12:33,264 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:33,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:33,265 INFO L85 PathProgramCache]: Analyzing trace with hash -930261550, now seen corresponding path program 1 times [2023-02-15 01:12:33,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:33,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810342173] [2023-02-15 01:12:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:33,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:33,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:33,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810342173] [2023-02-15 01:12:33,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810342173] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:33,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:33,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:12:33,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862934278] [2023-02-15 01:12:33,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:33,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:12:33,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:33,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:12:33,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:12:33,290 INFO L87 Difference]: Start difference. First operand 279 states and 392 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:12:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:33,305 INFO L93 Difference]: Finished difference Result 439 states and 602 transitions. [2023-02-15 01:12:33,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:12:33,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-15 01:12:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:33,308 INFO L225 Difference]: With dead ends: 439 [2023-02-15 01:12:33,308 INFO L226 Difference]: Without dead ends: 439 [2023-02-15 01:12:33,309 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 [2023-02-15 01:12:33,309 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 148 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:33,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 452 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:12:33,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-02-15 01:12:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 283. [2023-02-15 01:12:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.766355140186916) internal successors, (378), 272 states have internal predecessors, (378), 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) [2023-02-15 01:12:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 394 transitions. [2023-02-15 01:12:33,315 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 394 transitions. Word has length 14 [2023-02-15 01:12:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:33,315 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 394 transitions. [2023-02-15 01:12:33,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:12:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 394 transitions. [2023-02-15 01:12:33,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 01:12:33,316 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:33,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:33,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 01:12:33,316 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash -120914924, now seen corresponding path program 1 times [2023-02-15 01:12:33,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:33,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189502184] [2023-02-15 01:12:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:33,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:33,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:33,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:33,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189502184] [2023-02-15 01:12:33,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189502184] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:33,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:33,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:12:33,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39211073] [2023-02-15 01:12:33,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:33,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:12:33,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:33,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:12:33,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:12:33,353 INFO L87 Difference]: Start difference. First operand 283 states and 394 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:12:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:33,522 INFO L93 Difference]: Finished difference Result 406 states and 490 transitions. [2023-02-15 01:12:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:12:33,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-15 01:12:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:33,524 INFO L225 Difference]: With dead ends: 406 [2023-02-15 01:12:33,524 INFO L226 Difference]: Without dead ends: 406 [2023-02-15 01:12:33,524 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 [2023-02-15 01:12:33,525 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 269 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:33,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 357 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:12:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-02-15 01:12:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 283. [2023-02-15 01:12:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.7383177570093458) internal successors, (372), 272 states have internal predecessors, (372), 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) [2023-02-15 01:12:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 388 transitions. [2023-02-15 01:12:33,530 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 388 transitions. Word has length 14 [2023-02-15 01:12:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:33,530 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 388 transitions. [2023-02-15 01:12:33,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:12:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 388 transitions. [2023-02-15 01:12:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 01:12:33,531 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:33,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:33,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 01:12:33,531 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash -120914923, now seen corresponding path program 1 times [2023-02-15 01:12:33,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:33,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241992042] [2023-02-15 01:12:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:33,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:33,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:33,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:33,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241992042] [2023-02-15 01:12:33,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241992042] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:33,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:33,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:12:33,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317596692] [2023-02-15 01:12:33,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:33,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:12:33,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:33,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:12:33,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:12:33,634 INFO L87 Difference]: Start difference. First operand 283 states and 388 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:12:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:33,809 INFO L93 Difference]: Finished difference Result 323 states and 397 transitions. [2023-02-15 01:12:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:12:33,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-15 01:12:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:33,810 INFO L225 Difference]: With dead ends: 323 [2023-02-15 01:12:33,810 INFO L226 Difference]: Without dead ends: 323 [2023-02-15 01:12:33,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:12:33,811 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 97 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:33,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 609 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-02-15 01:12:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 287. [2023-02-15 01:12:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 218 states have (on average 1.7293577981651376) internal successors, (377), 274 states have internal predecessors, (377), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 01:12:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 393 transitions. [2023-02-15 01:12:33,818 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 393 transitions. Word has length 14 [2023-02-15 01:12:33,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:33,818 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 393 transitions. [2023-02-15 01:12:33,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:12:33,818 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 393 transitions. [2023-02-15 01:12:33,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 01:12:33,819 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:33,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:33,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 01:12:33,820 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:33,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1042256562, now seen corresponding path program 1 times [2023-02-15 01:12:33,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:33,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763231909] [2023-02-15 01:12:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:33,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:33,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:12:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:33,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763231909] [2023-02-15 01:12:33,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763231909] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:33,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:33,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:12:33,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354664594] [2023-02-15 01:12:33,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:33,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:12:33,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:12:33,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:12:33,873 INFO L87 Difference]: Start difference. First operand 287 states and 393 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2023-02-15 01:12:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:34,039 INFO L93 Difference]: Finished difference Result 466 states and 595 transitions. [2023-02-15 01:12:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:12:34,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 [2023-02-15 01:12:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:34,041 INFO L225 Difference]: With dead ends: 466 [2023-02-15 01:12:34,041 INFO L226 Difference]: Without dead ends: 466 [2023-02-15 01:12:34,041 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 [2023-02-15 01:12:34,042 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 260 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:34,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 370 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:34,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-02-15 01:12:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 293. [2023-02-15 01:12:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 224 states have (on average 1.7098214285714286) internal successors, (383), 280 states have internal predecessors, (383), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 01:12:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 399 transitions. [2023-02-15 01:12:34,049 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 399 transitions. Word has length 17 [2023-02-15 01:12:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:34,049 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 399 transitions. [2023-02-15 01:12:34,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2023-02-15 01:12:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 399 transitions. [2023-02-15 01:12:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 01:12:34,051 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:34,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:34,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 01:12:34,051 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1042256563, now seen corresponding path program 1 times [2023-02-15 01:12:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:34,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26726167] [2023-02-15 01:12:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:34,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:34,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:12:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:34,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:34,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26726167] [2023-02-15 01:12:34,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26726167] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:34,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:34,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:12:34,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107074726] [2023-02-15 01:12:34,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:34,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:12:34,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:12:34,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:12:34,119 INFO L87 Difference]: Start difference. First operand 293 states and 399 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2023-02-15 01:12:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:34,259 INFO L93 Difference]: Finished difference Result 342 states and 419 transitions. [2023-02-15 01:12:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:12:34,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 [2023-02-15 01:12:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:34,260 INFO L225 Difference]: With dead ends: 342 [2023-02-15 01:12:34,260 INFO L226 Difference]: Without dead ends: 342 [2023-02-15 01:12:34,260 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 [2023-02-15 01:12:34,261 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 178 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:34,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 374 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:34,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-02-15 01:12:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 293. [2023-02-15 01:12:34,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 224 states have (on average 1.6830357142857142) internal successors, (377), 280 states have internal predecessors, (377), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 01:12:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 393 transitions. [2023-02-15 01:12:34,268 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 393 transitions. Word has length 17 [2023-02-15 01:12:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:34,269 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 393 transitions. [2023-02-15 01:12:34,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2023-02-15 01:12:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 393 transitions. [2023-02-15 01:12:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 01:12:34,272 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:34,272 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] [2023-02-15 01:12:34,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 01:12:34,272 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:34,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:34,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1738140034, now seen corresponding path program 1 times [2023-02-15 01:12:34,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:34,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426532061] [2023-02-15 01:12:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:34,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:34,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:34,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:34,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426532061] [2023-02-15 01:12:34,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426532061] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:34,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:34,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:12:34,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015221576] [2023-02-15 01:12:34,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:34,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:12:34,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:12:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:12:34,301 INFO L87 Difference]: Start difference. First operand 293 states and 393 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-02-15 01:12:34,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:34,419 INFO L93 Difference]: Finished difference Result 385 states and 494 transitions. [2023-02-15 01:12:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:12:34,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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 20 [2023-02-15 01:12:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:34,420 INFO L225 Difference]: With dead ends: 385 [2023-02-15 01:12:34,421 INFO L226 Difference]: Without dead ends: 385 [2023-02-15 01:12:34,421 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 [2023-02-15 01:12:34,421 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 135 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:34,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 263 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-02-15 01:12:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 290. [2023-02-15 01:12:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 224 states have (on average 1.65625) internal successors, (371), 277 states have internal predecessors, (371), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 01:12:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 387 transitions. [2023-02-15 01:12:34,426 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 387 transitions. Word has length 20 [2023-02-15 01:12:34,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:34,426 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 387 transitions. [2023-02-15 01:12:34,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-02-15 01:12:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 387 transitions. [2023-02-15 01:12:34,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 01:12:34,426 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:34,426 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] [2023-02-15 01:12:34,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 01:12:34,426 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:34,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1738140033, now seen corresponding path program 1 times [2023-02-15 01:12:34,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:34,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076387424] [2023-02-15 01:12:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:34,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:34,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:34,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076387424] [2023-02-15 01:12:34,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076387424] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:34,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:34,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:12:34,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632610696] [2023-02-15 01:12:34,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:34,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:12:34,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:34,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:12:34,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:12:34,476 INFO L87 Difference]: Start difference. First operand 290 states and 387 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-02-15 01:12:34,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:34,589 INFO L93 Difference]: Finished difference Result 505 states and 618 transitions. [2023-02-15 01:12:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:12:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 20 [2023-02-15 01:12:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:34,590 INFO L225 Difference]: With dead ends: 505 [2023-02-15 01:12:34,590 INFO L226 Difference]: Without dead ends: 505 [2023-02-15 01:12:34,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:12:34,591 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 361 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:34,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 423 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-02-15 01:12:34,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 293. [2023-02-15 01:12:34,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 228 states have (on average 1.6359649122807018) internal successors, (373), 280 states have internal predecessors, (373), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 01:12:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 389 transitions. [2023-02-15 01:12:34,596 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 389 transitions. Word has length 20 [2023-02-15 01:12:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:34,596 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 389 transitions. [2023-02-15 01:12:34,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-02-15 01:12:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 389 transitions. [2023-02-15 01:12:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 01:12:34,596 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:34,596 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] [2023-02-15 01:12:34,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-15 01:12:34,597 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:34,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:34,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1952233834, now seen corresponding path program 1 times [2023-02-15 01:12:34,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:34,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507893399] [2023-02-15 01:12:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:34,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:34,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:34,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:34,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507893399] [2023-02-15 01:12:34,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507893399] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:34,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:34,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:12:34,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068255226] [2023-02-15 01:12:34,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:34,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:12:34,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:34,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:12:34,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:12:34,649 INFO L87 Difference]: Start difference. First operand 293 states and 389 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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) [2023-02-15 01:12:34,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:34,788 INFO L93 Difference]: Finished difference Result 504 states and 616 transitions. [2023-02-15 01:12:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:12:34,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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 [2023-02-15 01:12:34,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:34,789 INFO L225 Difference]: With dead ends: 504 [2023-02-15 01:12:34,789 INFO L226 Difference]: Without dead ends: 504 [2023-02-15 01:12:34,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:12:34,790 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 285 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:34,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 492 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:34,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-15 01:12:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 295. [2023-02-15 01:12:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 230 states have (on average 1.6304347826086956) internal successors, (375), 282 states have internal predecessors, (375), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 01:12:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 391 transitions. [2023-02-15 01:12:34,795 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 391 transitions. Word has length 21 [2023-02-15 01:12:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:34,795 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 391 transitions. [2023-02-15 01:12:34,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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) [2023-02-15 01:12:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 391 transitions. [2023-02-15 01:12:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 01:12:34,795 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:34,795 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] [2023-02-15 01:12:34,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 01:12:34,795 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1952289538, now seen corresponding path program 1 times [2023-02-15 01:12:34,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:34,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244920087] [2023-02-15 01:12:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:34,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:34,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:34,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:34,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244920087] [2023-02-15 01:12:34,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244920087] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:34,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:34,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 01:12:34,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476893651] [2023-02-15 01:12:34,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:34,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:12:34,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:34,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:12:34,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:12:34,918 INFO L87 Difference]: Start difference. First operand 295 states and 391 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2023-02-15 01:12:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:35,003 INFO L93 Difference]: Finished difference Result 328 states and 393 transitions. [2023-02-15 01:12:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 01:12:35,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 [2023-02-15 01:12:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:35,005 INFO L225 Difference]: With dead ends: 328 [2023-02-15 01:12:35,005 INFO L226 Difference]: Without dead ends: 328 [2023-02-15 01:12:35,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:12:35,005 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 337 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:35,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 991 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-02-15 01:12:35,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 295. [2023-02-15 01:12:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 282 states have internal predecessors, (373), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 01:12:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 389 transitions. [2023-02-15 01:12:35,009 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 389 transitions. Word has length 21 [2023-02-15 01:12:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:35,010 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 389 transitions. [2023-02-15 01:12:35,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2023-02-15 01:12:35,010 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 389 transitions. [2023-02-15 01:12:35,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 01:12:35,010 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:35,010 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] [2023-02-15 01:12:35,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-15 01:12:35,010 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:35,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:35,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1952291460, now seen corresponding path program 1 times [2023-02-15 01:12:35,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:35,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367544317] [2023-02-15 01:12:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:35,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:35,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:35,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:35,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367544317] [2023-02-15 01:12:35,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367544317] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:35,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:35,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 01:12:35,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027092862] [2023-02-15 01:12:35,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:35,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:12:35,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:35,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:12:35,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:12:35,101 INFO L87 Difference]: Start difference. First operand 295 states and 389 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2023-02-15 01:12:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:35,174 INFO L93 Difference]: Finished difference Result 318 states and 379 transitions. [2023-02-15 01:12:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 01:12:35,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 [2023-02-15 01:12:35,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:35,176 INFO L225 Difference]: With dead ends: 318 [2023-02-15 01:12:35,176 INFO L226 Difference]: Without dead ends: 318 [2023-02-15 01:12:35,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:12:35,176 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 326 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:35,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 998 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:12:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-02-15 01:12:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 285. [2023-02-15 01:12:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 222 states have (on average 1.617117117117117) internal successors, (359), 272 states have internal predecessors, (359), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 01:12:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 375 transitions. [2023-02-15 01:12:35,180 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 375 transitions. Word has length 21 [2023-02-15 01:12:35,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:35,180 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 375 transitions. [2023-02-15 01:12:35,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2023-02-15 01:12:35,180 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 375 transitions. [2023-02-15 01:12:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 01:12:35,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:35,181 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] [2023-02-15 01:12:35,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 01:12:35,181 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:35,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:35,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1056785802, now seen corresponding path program 1 times [2023-02-15 01:12:35,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:35,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207067732] [2023-02-15 01:12:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:35,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:35,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:12:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:35,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:35,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207067732] [2023-02-15 01:12:35,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207067732] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:35,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:35,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 01:12:35,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062124641] [2023-02-15 01:12:35,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:35,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 01:12:35,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:35,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 01:12:35,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:12:35,532 INFO L87 Difference]: Start difference. First operand 285 states and 375 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2023-02-15 01:12:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:36,057 INFO L93 Difference]: Finished difference Result 398 states and 505 transitions. [2023-02-15 01:12:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 01:12:36,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 [2023-02-15 01:12:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:36,059 INFO L225 Difference]: With dead ends: 398 [2023-02-15 01:12:36,059 INFO L226 Difference]: Without dead ends: 396 [2023-02-15 01:12:36,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:12:36,059 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 234 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:36,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 805 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:12:36,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-02-15 01:12:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 337. [2023-02-15 01:12:36,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 269 states have (on average 1.5910780669144982) internal successors, (428), 320 states have internal predecessors, (428), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 01:12:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 450 transitions. [2023-02-15 01:12:36,065 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 450 transitions. Word has length 23 [2023-02-15 01:12:36,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:36,065 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 450 transitions. [2023-02-15 01:12:36,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2023-02-15 01:12:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 450 transitions. [2023-02-15 01:12:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 01:12:36,065 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:36,065 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] [2023-02-15 01:12:36,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-15 01:12:36,065 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:36,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:36,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1951233503, now seen corresponding path program 1 times [2023-02-15 01:12:36,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:36,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503497081] [2023-02-15 01:12:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:36,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:36,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:12:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:36,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:36,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503497081] [2023-02-15 01:12:36,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503497081] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:36,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:36,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:12:36,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456056621] [2023-02-15 01:12:36,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:36,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:12:36,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:36,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:12:36,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:12:36,107 INFO L87 Difference]: Start difference. First operand 337 states and 450 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) [2023-02-15 01:12:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:36,260 INFO L93 Difference]: Finished difference Result 504 states and 649 transitions. [2023-02-15 01:12:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:12:36,261 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 [2023-02-15 01:12:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:36,262 INFO L225 Difference]: With dead ends: 504 [2023-02-15 01:12:36,262 INFO L226 Difference]: Without dead ends: 504 [2023-02-15 01:12:36,263 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 [2023-02-15 01:12:36,263 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 224 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:36,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 354 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:36,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-15 01:12:36,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 361. [2023-02-15 01:12:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 293 states have (on average 1.6245733788395904) internal successors, (476), 344 states have internal predecessors, (476), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 01:12:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2023-02-15 01:12:36,270 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 25 [2023-02-15 01:12:36,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:36,270 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2023-02-15 01:12:36,270 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) [2023-02-15 01:12:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2023-02-15 01:12:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 01:12:36,270 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:36,271 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] [2023-02-15 01:12:36,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-15 01:12:36,271 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:36,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1951233502, now seen corresponding path program 1 times [2023-02-15 01:12:36,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:36,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610498671] [2023-02-15 01:12:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:36,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:12:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:36,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:36,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610498671] [2023-02-15 01:12:36,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610498671] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:36,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:36,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:12:36,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244736713] [2023-02-15 01:12:36,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:36,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:12:36,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:36,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:12:36,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:12:36,413 INFO L87 Difference]: Start difference. First operand 361 states and 498 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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) [2023-02-15 01:12:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:36,604 INFO L93 Difference]: Finished difference Result 412 states and 520 transitions. [2023-02-15 01:12:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:12:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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 [2023-02-15 01:12:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:36,606 INFO L225 Difference]: With dead ends: 412 [2023-02-15 01:12:36,606 INFO L226 Difference]: Without dead ends: 412 [2023-02-15 01:12:36,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:12:36,606 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 331 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:36,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 434 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-15 01:12:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 361. [2023-02-15 01:12:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 293 states have (on average 1.583617747440273) internal successors, (464), 344 states have internal predecessors, (464), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 01:12:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 486 transitions. [2023-02-15 01:12:36,612 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 486 transitions. Word has length 25 [2023-02-15 01:12:36,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:36,612 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 486 transitions. [2023-02-15 01:12:36,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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) [2023-02-15 01:12:36,612 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 486 transitions. [2023-02-15 01:12:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 01:12:36,613 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:36,613 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] [2023-02-15 01:12:36,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-15 01:12:36,613 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:36,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:36,613 INFO L85 PathProgramCache]: Analyzing trace with hash 456369005, now seen corresponding path program 1 times [2023-02-15 01:12:36,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:36,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349967120] [2023-02-15 01:12:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:36,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:36,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:36,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:36,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349967120] [2023-02-15 01:12:36,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349967120] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:36,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:36,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 01:12:36,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127824715] [2023-02-15 01:12:36,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:36,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 01:12:36,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:36,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 01:12:36,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:12:36,869 INFO L87 Difference]: Start difference. First operand 361 states and 486 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2023-02-15 01:12:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:37,123 INFO L93 Difference]: Finished difference Result 639 states and 825 transitions. [2023-02-15 01:12:37,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:12:37,124 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 [2023-02-15 01:12:37,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:37,126 INFO L225 Difference]: With dead ends: 639 [2023-02-15 01:12:37,126 INFO L226 Difference]: Without dead ends: 639 [2023-02-15 01:12:37,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-02-15 01:12:37,127 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 504 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:37,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1099 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2023-02-15 01:12:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 423. [2023-02-15 01:12:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 352 states have (on average 1.5482954545454546) internal successors, (545), 403 states have internal predecessors, (545), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 01:12:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 571 transitions. [2023-02-15 01:12:37,134 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 571 transitions. Word has length 25 [2023-02-15 01:12:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:37,134 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 571 transitions. [2023-02-15 01:12:37,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2023-02-15 01:12:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 571 transitions. [2023-02-15 01:12:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 01:12:37,135 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:37,135 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] [2023-02-15 01:12:37,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-15 01:12:37,135 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:37,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:37,135 INFO L85 PathProgramCache]: Analyzing trace with hash 484106160, now seen corresponding path program 1 times [2023-02-15 01:12:37,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:37,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724501568] [2023-02-15 01:12:37,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:37,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:37,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:37,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:37,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724501568] [2023-02-15 01:12:37,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724501568] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:37,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:37,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:12:37,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492274578] [2023-02-15 01:12:37,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:37,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:12:37,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:37,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:12:37,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:12:37,260 INFO L87 Difference]: Start difference. First operand 423 states and 571 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) 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) [2023-02-15 01:12:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:37,487 INFO L93 Difference]: Finished difference Result 532 states and 666 transitions. [2023-02-15 01:12:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:12:37,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) 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 [2023-02-15 01:12:37,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:37,490 INFO L225 Difference]: With dead ends: 532 [2023-02-15 01:12:37,490 INFO L226 Difference]: Without dead ends: 532 [2023-02-15 01:12:37,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:12:37,491 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 948 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:37,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 342 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:12:37,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-02-15 01:12:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 439. [2023-02-15 01:12:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 373 states have (on average 1.5308310991957104) internal successors, (571), 418 states have internal predecessors, (571), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 01:12:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 599 transitions. [2023-02-15 01:12:37,497 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 599 transitions. Word has length 27 [2023-02-15 01:12:37,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:37,497 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 599 transitions. [2023-02-15 01:12:37,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) 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) [2023-02-15 01:12:37,497 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 599 transitions. [2023-02-15 01:12:37,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 01:12:37,498 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:37,498 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] [2023-02-15 01:12:37,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-15 01:12:37,498 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:37,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:37,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1109766870, now seen corresponding path program 1 times [2023-02-15 01:12:37,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:37,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229548856] [2023-02-15 01:12:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:37,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:37,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:12:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:37,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:37,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229548856] [2023-02-15 01:12:37,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229548856] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:37,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:37,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:12:37,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669808403] [2023-02-15 01:12:37,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:37,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:12:37,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:37,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:12:37,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:12:37,584 INFO L87 Difference]: Start difference. First operand 439 states and 599 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2023-02-15 01:12:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:37,782 INFO L93 Difference]: Finished difference Result 691 states and 907 transitions. [2023-02-15 01:12:37,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:12:37,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 [2023-02-15 01:12:37,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:37,784 INFO L225 Difference]: With dead ends: 691 [2023-02-15 01:12:37,784 INFO L226 Difference]: Without dead ends: 691 [2023-02-15 01:12:37,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:12:37,785 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 466 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:37,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 939 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2023-02-15 01:12:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 436. [2023-02-15 01:12:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 373 states have (on average 1.5040214477211795) internal successors, (561), 415 states have internal predecessors, (561), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 01:12:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 589 transitions. [2023-02-15 01:12:37,792 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 589 transitions. Word has length 28 [2023-02-15 01:12:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:37,792 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 589 transitions. [2023-02-15 01:12:37,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2023-02-15 01:12:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 589 transitions. [2023-02-15 01:12:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 01:12:37,793 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:37,793 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] [2023-02-15 01:12:37,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 01:12:37,793 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:37,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2122389103, now seen corresponding path program 1 times [2023-02-15 01:12:37,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:37,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084578136] [2023-02-15 01:12:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:37,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:37,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:37,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:37,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084578136] [2023-02-15 01:12:37,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084578136] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:37,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:37,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:12:37,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152940838] [2023-02-15 01:12:37,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:37,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:12:37,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:37,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:12:37,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:12:37,861 INFO L87 Difference]: Start difference. First operand 436 states and 589 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 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) [2023-02-15 01:12:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:37,936 INFO L93 Difference]: Finished difference Result 459 states and 587 transitions. [2023-02-15 01:12:37,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 01:12:37,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 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 [2023-02-15 01:12:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:37,939 INFO L225 Difference]: With dead ends: 459 [2023-02-15 01:12:37,939 INFO L226 Difference]: Without dead ends: 459 [2023-02-15 01:12:37,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:12:37,939 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 522 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:37,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 437 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-02-15 01:12:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 434. [2023-02-15 01:12:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 373 states have (on average 1.4932975871313674) internal successors, (557), 413 states have internal predecessors, (557), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 01:12:37,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 585 transitions. [2023-02-15 01:12:37,946 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 585 transitions. Word has length 28 [2023-02-15 01:12:37,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:37,946 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 585 transitions. [2023-02-15 01:12:37,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 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) [2023-02-15 01:12:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 585 transitions. [2023-02-15 01:12:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 01:12:37,947 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:37,947 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] [2023-02-15 01:12:37,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-15 01:12:37,947 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:37,947 INFO L85 PathProgramCache]: Analyzing trace with hash -43057304, now seen corresponding path program 1 times [2023-02-15 01:12:37,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:37,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903258051] [2023-02-15 01:12:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:37,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:38,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:12:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:38,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:38,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903258051] [2023-02-15 01:12:38,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903258051] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:38,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:38,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:12:38,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913879043] [2023-02-15 01:12:38,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:38,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 01:12:38,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:38,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 01:12:38,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:12:38,034 INFO L87 Difference]: Start difference. First operand 434 states and 585 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2023-02-15 01:12:38,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:38,160 INFO L93 Difference]: Finished difference Result 493 states and 639 transitions. [2023-02-15 01:12:38,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:12:38,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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 29 [2023-02-15 01:12:38,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:38,162 INFO L225 Difference]: With dead ends: 493 [2023-02-15 01:12:38,162 INFO L226 Difference]: Without dead ends: 493 [2023-02-15 01:12:38,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:12:38,162 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 154 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:38,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 520 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-02-15 01:12:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 434. [2023-02-15 01:12:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 373 states have (on average 1.4879356568364612) internal successors, (555), 413 states have internal predecessors, (555), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 01:12:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 583 transitions. [2023-02-15 01:12:38,169 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 583 transitions. Word has length 29 [2023-02-15 01:12:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:38,169 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 583 transitions. [2023-02-15 01:12:38,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2023-02-15 01:12:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 583 transitions. [2023-02-15 01:12:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 01:12:38,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:38,170 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] [2023-02-15 01:12:38,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-15 01:12:38,170 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:38,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:38,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1334068214, now seen corresponding path program 1 times [2023-02-15 01:12:38,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:38,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686824438] [2023-02-15 01:12:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:38,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:38,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:12:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:38,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:38,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686824438] [2023-02-15 01:12:38,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686824438] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:38,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:38,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:12:38,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818166246] [2023-02-15 01:12:38,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:38,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:12:38,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:38,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:12:38,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:12:38,414 INFO L87 Difference]: Start difference. First operand 434 states and 583 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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) [2023-02-15 01:12:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:38,594 INFO L93 Difference]: Finished difference Result 475 states and 613 transitions. [2023-02-15 01:12:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:12:38,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 30 [2023-02-15 01:12:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:38,596 INFO L225 Difference]: With dead ends: 475 [2023-02-15 01:12:38,596 INFO L226 Difference]: Without dead ends: 475 [2023-02-15 01:12:38,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:12:38,596 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 130 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:38,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 657 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-02-15 01:12:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 428. [2023-02-15 01:12:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 367 states have (on average 1.4741144414168936) internal successors, (541), 407 states have internal predecessors, (541), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 01:12:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 569 transitions. [2023-02-15 01:12:38,602 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 569 transitions. Word has length 30 [2023-02-15 01:12:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:38,603 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 569 transitions. [2023-02-15 01:12:38,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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) [2023-02-15 01:12:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 569 transitions. [2023-02-15 01:12:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 01:12:38,603 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:38,603 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] [2023-02-15 01:12:38,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-15 01:12:38,603 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:38,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1334776215, now seen corresponding path program 1 times [2023-02-15 01:12:38,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:38,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284149926] [2023-02-15 01:12:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:38,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:38,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:12:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:38,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:38,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284149926] [2023-02-15 01:12:38,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284149926] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:38,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:38,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:12:38,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139186246] [2023-02-15 01:12:38,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:38,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 01:12:38,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:38,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 01:12:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:12:38,700 INFO L87 Difference]: Start difference. First operand 428 states and 569 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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) [2023-02-15 01:12:38,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:38,847 INFO L93 Difference]: Finished difference Result 534 states and 690 transitions. [2023-02-15 01:12:38,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 01:12:38,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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 30 [2023-02-15 01:12:38,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:38,849 INFO L225 Difference]: With dead ends: 534 [2023-02-15 01:12:38,849 INFO L226 Difference]: Without dead ends: 534 [2023-02-15 01:12:38,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:12:38,849 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 147 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:38,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 473 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-02-15 01:12:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 468. [2023-02-15 01:12:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 404 states have (on average 1.4678217821782178) internal successors, (593), 445 states have internal predecessors, (593), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-15 01:12:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 625 transitions. [2023-02-15 01:12:38,857 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 625 transitions. Word has length 30 [2023-02-15 01:12:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:38,857 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 625 transitions. [2023-02-15 01:12:38,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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) [2023-02-15 01:12:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 625 transitions. [2023-02-15 01:12:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 01:12:38,857 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:38,857 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] [2023-02-15 01:12:38,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-15 01:12:38,858 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:38,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:38,858 INFO L85 PathProgramCache]: Analyzing trace with hash -493536303, now seen corresponding path program 1 times [2023-02-15 01:12:38,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:38,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459483551] [2023-02-15 01:12:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:38,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:39,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:39,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459483551] [2023-02-15 01:12:39,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459483551] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:39,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:39,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 01:12:39,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721289152] [2023-02-15 01:12:39,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:39,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 01:12:39,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:39,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 01:12:39,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:12:39,016 INFO L87 Difference]: Start difference. First operand 468 states and 625 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 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) [2023-02-15 01:12:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:39,284 INFO L93 Difference]: Finished difference Result 555 states and 683 transitions. [2023-02-15 01:12:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 01:12:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 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 30 [2023-02-15 01:12:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:39,286 INFO L225 Difference]: With dead ends: 555 [2023-02-15 01:12:39,286 INFO L226 Difference]: Without dead ends: 555 [2023-02-15 01:12:39,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2023-02-15 01:12:39,287 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 793 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:39,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 344 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:12:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2023-02-15 01:12:39,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 469. [2023-02-15 01:12:39,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 406 states have (on average 1.458128078817734) internal successors, (592), 445 states have internal predecessors, (592), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-15 01:12:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 626 transitions. [2023-02-15 01:12:39,294 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 626 transitions. Word has length 30 [2023-02-15 01:12:39,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:39,295 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 626 transitions. [2023-02-15 01:12:39,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 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) [2023-02-15 01:12:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 626 transitions. [2023-02-15 01:12:39,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 01:12:39,295 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:39,295 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] [2023-02-15 01:12:39,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-15 01:12:39,295 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1475285643, now seen corresponding path program 1 times [2023-02-15 01:12:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:39,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017310177] [2023-02-15 01:12:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:39,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:39,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:12:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:39,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:39,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017310177] [2023-02-15 01:12:39,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017310177] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:39,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:39,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:12:39,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126650254] [2023-02-15 01:12:39,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:39,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:12:39,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:39,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:12:39,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:12:39,431 INFO L87 Difference]: Start difference. First operand 469 states and 626 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2023-02-15 01:12:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:39,789 INFO L93 Difference]: Finished difference Result 893 states and 1179 transitions. [2023-02-15 01:12:39,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 01:12:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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 32 [2023-02-15 01:12:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:39,792 INFO L225 Difference]: With dead ends: 893 [2023-02-15 01:12:39,792 INFO L226 Difference]: Without dead ends: 893 [2023-02-15 01:12:39,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-02-15 01:12:39,792 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 340 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:39,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 754 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:12:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2023-02-15 01:12:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 544. [2023-02-15 01:12:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 475 states have (on average 1.4442105263157894) internal successors, (686), 516 states have internal predecessors, (686), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-15 01:12:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 728 transitions. [2023-02-15 01:12:39,803 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 728 transitions. Word has length 32 [2023-02-15 01:12:39,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:39,803 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 728 transitions. [2023-02-15 01:12:39,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2023-02-15 01:12:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 728 transitions. [2023-02-15 01:12:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 01:12:39,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:39,803 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:39,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-15 01:12:39,805 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:39,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1918246339, now seen corresponding path program 1 times [2023-02-15 01:12:39,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:39,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789122725] [2023-02-15 01:12:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:39,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:39,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 01:12:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:39,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:39,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789122725] [2023-02-15 01:12:39,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789122725] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:12:39,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446210363] [2023-02-15 01:12:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:39,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:39,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:12:39,837 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) [2023-02-15 01:12:39,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 01:12:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:39,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 01:12:39,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:12:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 01:12:39,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:12:39,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446210363] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:39,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:12:39,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-02-15 01:12:39,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084121607] [2023-02-15 01:12:39,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:39,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:12:39,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:39,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:12:39,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:12:39,944 INFO L87 Difference]: Start difference. First operand 544 states and 728 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-02-15 01:12:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:39,950 INFO L93 Difference]: Finished difference Result 553 states and 736 transitions. [2023-02-15 01:12:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:12:39,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2023-02-15 01:12:39,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:39,952 INFO L225 Difference]: With dead ends: 553 [2023-02-15 01:12:39,952 INFO L226 Difference]: Without dead ends: 552 [2023-02-15 01:12:39,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:12:39,952 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:39,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 273 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:12:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-02-15 01:12:39,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 548. [2023-02-15 01:12:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 479 states have (on average 1.4384133611691023) internal successors, (689), 520 states have internal predecessors, (689), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-15 01:12:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 731 transitions. [2023-02-15 01:12:39,973 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 731 transitions. Word has length 33 [2023-02-15 01:12:39,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:39,973 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 731 transitions. [2023-02-15 01:12:39,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-02-15 01:12:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 731 transitions. [2023-02-15 01:12:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 01:12:39,974 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:39,974 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:39,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 01:12:40,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:40,179 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:40,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1559072507, now seen corresponding path program 1 times [2023-02-15 01:12:40,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:40,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770353294] [2023-02-15 01:12:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:40,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:40,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 01:12:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 01:12:40,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:40,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770353294] [2023-02-15 01:12:40,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770353294] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:40,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:40,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 01:12:40,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759942828] [2023-02-15 01:12:40,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:40,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 01:12:40,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:40,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 01:12:40,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:12:40,571 INFO L87 Difference]: Start difference. First operand 548 states and 731 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2023-02-15 01:12:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:41,005 INFO L93 Difference]: Finished difference Result 555 states and 726 transitions. [2023-02-15 01:12:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 01:12:41,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 33 [2023-02-15 01:12:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:41,006 INFO L225 Difference]: With dead ends: 555 [2023-02-15 01:12:41,007 INFO L226 Difference]: Without dead ends: 553 [2023-02-15 01:12:41,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2023-02-15 01:12:41,007 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 196 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:41,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 857 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:12:41,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-02-15 01:12:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 505. [2023-02-15 01:12:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 439 states have (on average 1.4328018223234624) internal successors, (629), 479 states have internal predecessors, (629), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-15 01:12:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 667 transitions. [2023-02-15 01:12:41,014 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 667 transitions. Word has length 33 [2023-02-15 01:12:41,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:41,014 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 667 transitions. [2023-02-15 01:12:41,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2023-02-15 01:12:41,015 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 667 transitions. [2023-02-15 01:12:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 01:12:41,015 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:41,015 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] [2023-02-15 01:12:41,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-15 01:12:41,016 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:41,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1510785108, now seen corresponding path program 1 times [2023-02-15 01:12:41,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:41,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631996587] [2023-02-15 01:12:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:41,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:41,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:12:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:41,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:41,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631996587] [2023-02-15 01:12:41,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631996587] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:41,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:41,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:12:41,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177258544] [2023-02-15 01:12:41,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:41,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:12:41,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:41,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:12:41,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:12:41,222 INFO L87 Difference]: Start difference. First operand 505 states and 667 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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) [2023-02-15 01:12:41,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:41,503 INFO L93 Difference]: Finished difference Result 566 states and 708 transitions. [2023-02-15 01:12:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 01:12:41,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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 33 [2023-02-15 01:12:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:41,505 INFO L225 Difference]: With dead ends: 566 [2023-02-15 01:12:41,506 INFO L226 Difference]: Without dead ends: 566 [2023-02-15 01:12:41,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-02-15 01:12:41,506 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 403 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:41,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 535 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:12:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-02-15 01:12:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 505. [2023-02-15 01:12:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 439 states have (on average 1.4214123006833712) internal successors, (624), 479 states have internal predecessors, (624), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-15 01:12:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 662 transitions. [2023-02-15 01:12:41,513 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 662 transitions. Word has length 33 [2023-02-15 01:12:41,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:41,513 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 662 transitions. [2023-02-15 01:12:41,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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) [2023-02-15 01:12:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 662 transitions. [2023-02-15 01:12:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 01:12:41,513 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:41,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:41,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-15 01:12:41,514 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:41,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:41,514 INFO L85 PathProgramCache]: Analyzing trace with hash 896646995, now seen corresponding path program 1 times [2023-02-15 01:12:41,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:41,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134542726] [2023-02-15 01:12:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:41,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:41,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:41,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 01:12:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 01:12:41,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:41,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134542726] [2023-02-15 01:12:41,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134542726] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:41,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:41,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:12:41,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029587378] [2023-02-15 01:12:41,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:41,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:12:41,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:41,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:12:41,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:12:41,542 INFO L87 Difference]: Start difference. First operand 505 states and 662 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-02-15 01:12:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:41,549 INFO L93 Difference]: Finished difference Result 507 states and 664 transitions. [2023-02-15 01:12:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:12:41,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 41 [2023-02-15 01:12:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:41,550 INFO L225 Difference]: With dead ends: 507 [2023-02-15 01:12:41,550 INFO L226 Difference]: Without dead ends: 507 [2023-02-15 01:12:41,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:12:41,551 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:41,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:12:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-02-15 01:12:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2023-02-15 01:12:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 441 states have (on average 1.4195011337868482) internal successors, (626), 481 states have internal predecessors, (626), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-15 01:12:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 664 transitions. [2023-02-15 01:12:41,560 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 664 transitions. Word has length 41 [2023-02-15 01:12:41,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:41,560 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 664 transitions. [2023-02-15 01:12:41,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-02-15 01:12:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 664 transitions. [2023-02-15 01:12:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 01:12:41,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:41,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:41,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-15 01:12:41,561 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:41,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:41,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1705993621, now seen corresponding path program 1 times [2023-02-15 01:12:41,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:41,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514731162] [2023-02-15 01:12:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:41,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:41,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:41,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 01:12:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 01:12:41,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514731162] [2023-02-15 01:12:41,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514731162] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:12:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434407388] [2023-02-15 01:12:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:41,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:41,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:12:41,877 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:12:41,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 01:12:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:41,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 01:12:41,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:12:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:42,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:12:42,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:12:42,288 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 32 treesize of output 36 [2023-02-15 01:12:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 01:12:42,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434407388] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:12:42,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:12:42,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 23 [2023-02-15 01:12:42,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013583492] [2023-02-15 01:12:42,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:12:42,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 01:12:42,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:42,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 01:12:42,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-02-15 01:12:42,427 INFO L87 Difference]: Start difference. First operand 507 states and 664 transitions. Second operand has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 01:12:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:42,903 INFO L93 Difference]: Finished difference Result 532 states and 664 transitions. [2023-02-15 01:12:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:12:42,904 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2023-02-15 01:12:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:42,905 INFO L225 Difference]: With dead ends: 532 [2023-02-15 01:12:42,905 INFO L226 Difference]: Without dead ends: 532 [2023-02-15 01:12:42,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2023-02-15 01:12:42,906 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 1239 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:42,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 1574 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:12:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-02-15 01:12:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 504. [2023-02-15 01:12:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 439 states have (on average 1.4123006833712983) internal successors, (620), 479 states have internal predecessors, (620), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-15 01:12:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 658 transitions. [2023-02-15 01:12:42,912 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 658 transitions. Word has length 41 [2023-02-15 01:12:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:42,913 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 658 transitions. [2023-02-15 01:12:42,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 01:12:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 658 transitions. [2023-02-15 01:12:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 01:12:42,913 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:42,913 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 01:12:42,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 01:12:43,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-02-15 01:12:43,118 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:43,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:43,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1350180533, now seen corresponding path program 1 times [2023-02-15 01:12:43,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:43,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407424579] [2023-02-15 01:12:43,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:43,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:43,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:43,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-15 01:12:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:12:43,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:43,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407424579] [2023-02-15 01:12:43,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407424579] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:12:43,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486400903] [2023-02-15 01:12:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:43,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:43,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:12:43,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:12:43,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 01:12:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:43,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 01:12:43,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:12:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:43,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:12:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:12:43,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486400903] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:12:43,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:12:43,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-15 01:12:43,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825393384] [2023-02-15 01:12:43,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:12:43,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 01:12:43,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 01:12:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:12:43,329 INFO L87 Difference]: Start difference. First operand 504 states and 658 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 01:12:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:43,376 INFO L93 Difference]: Finished difference Result 1164 states and 1506 transitions. [2023-02-15 01:12:43,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:12:43,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2023-02-15 01:12:43,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:43,380 INFO L225 Difference]: With dead ends: 1164 [2023-02-15 01:12:43,380 INFO L226 Difference]: Without dead ends: 1164 [2023-02-15 01:12:43,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:12:43,381 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 718 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:43,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 722 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:12:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2023-02-15 01:12:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 666. [2023-02-15 01:12:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 595 states have (on average 1.3647058823529412) internal successors, (812), 635 states have internal predecessors, (812), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-15 01:12:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 862 transitions. [2023-02-15 01:12:43,407 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 862 transitions. Word has length 44 [2023-02-15 01:12:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:43,407 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 862 transitions. [2023-02-15 01:12:43,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 01:12:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 862 transitions. [2023-02-15 01:12:43,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 01:12:43,409 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:43,409 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] [2023-02-15 01:12:43,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 01:12:43,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:43,615 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:43,615 INFO L85 PathProgramCache]: Analyzing trace with hash 649115955, now seen corresponding path program 1 times [2023-02-15 01:12:43,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:43,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501816511] [2023-02-15 01:12:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:43,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:43,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:43,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-15 01:12:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:12:43,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:43,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501816511] [2023-02-15 01:12:43,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501816511] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:12:43,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347390357] [2023-02-15 01:12:43,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:43,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:43,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:12:43,804 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:12:43,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 01:12:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:43,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 01:12:43,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:12:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:44,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:12:44,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347390357] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:44,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:12:44,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-02-15 01:12:44,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644666195] [2023-02-15 01:12:44,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:44,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:12:44,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:44,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:12:44,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:12:44,081 INFO L87 Difference]: Start difference. First operand 666 states and 862 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:12:44,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:44,290 INFO L93 Difference]: Finished difference Result 860 states and 1070 transitions. [2023-02-15 01:12:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:12:44,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2023-02-15 01:12:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:44,292 INFO L225 Difference]: With dead ends: 860 [2023-02-15 01:12:44,292 INFO L226 Difference]: Without dead ends: 860 [2023-02-15 01:12:44,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:12:44,293 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 457 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:44,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 412 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:12:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2023-02-15 01:12:44,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 663. [2023-02-15 01:12:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 595 states have (on average 1.3512605042016808) internal successors, (804), 632 states have internal predecessors, (804), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-15 01:12:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 854 transitions. [2023-02-15 01:12:44,301 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 854 transitions. Word has length 44 [2023-02-15 01:12:44,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:44,301 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 854 transitions. [2023-02-15 01:12:44,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:12:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 854 transitions. [2023-02-15 01:12:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 01:12:44,301 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:44,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:12:44,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 01:12:44,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:44,506 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:44,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:44,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1877190129, now seen corresponding path program 1 times [2023-02-15 01:12:44,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:44,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019456992] [2023-02-15 01:12:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:44,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:44,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:12:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:44,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-15 01:12:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:12:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:44,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019456992] [2023-02-15 01:12:44,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019456992] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:12:44,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157033501] [2023-02-15 01:12:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:44,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:44,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:12:44,574 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:12:44,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 01:12:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:44,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 01:12:44,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:12:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:44,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:12:44,764 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 01:12:44,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 01:12:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:12:44,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157033501] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:12:44,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:12:44,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-02-15 01:12:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551880416] [2023-02-15 01:12:44,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:12:44,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 01:12:44,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:44,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 01:12:44,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:12:44,783 INFO L87 Difference]: Start difference. First operand 663 states and 854 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:12:45,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:45,315 INFO L93 Difference]: Finished difference Result 2142 states and 2679 transitions. [2023-02-15 01:12:45,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 01:12:45,315 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2023-02-15 01:12:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:45,320 INFO L225 Difference]: With dead ends: 2142 [2023-02-15 01:12:45,320 INFO L226 Difference]: Without dead ends: 2142 [2023-02-15 01:12:45,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-02-15 01:12:45,321 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1770 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:45,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1772 Valid, 1030 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 01:12:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2023-02-15 01:12:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 851. [2023-02-15 01:12:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 775 states have (on average 1.2967741935483872) internal successors, (1005), 808 states have internal predecessors, (1005), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 30 states have call predecessors, (36), 36 states have call successors, (36) [2023-02-15 01:12:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1077 transitions. [2023-02-15 01:12:45,340 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1077 transitions. Word has length 46 [2023-02-15 01:12:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:45,340 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1077 transitions. [2023-02-15 01:12:45,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:12:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1077 transitions. [2023-02-15 01:12:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:12:45,340 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:45,340 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 01:12:45,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 01:12:45,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-15 01:12:45,548 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1534969807, now seen corresponding path program 1 times [2023-02-15 01:12:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:45,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379272122] [2023-02-15 01:12:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:45,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:45,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:12:45,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:45,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379272122] [2023-02-15 01:12:45,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379272122] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:12:45,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374925236] [2023-02-15 01:12:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:45,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:45,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:12:45,598 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:12:45,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 01:12:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 01:12:45,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:12:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:12:45,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:12:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:12:45,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374925236] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:12:45,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:12:45,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 7 [2023-02-15 01:12:45,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854582021] [2023-02-15 01:12:45,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:12:45,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:12:45,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:12:45,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:12:45,783 INFO L87 Difference]: Start difference. First operand 851 states and 1077 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:12:45,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:45,825 INFO L93 Difference]: Finished difference Result 2768 states and 3486 transitions. [2023-02-15 01:12:45,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 01:12:45,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-02-15 01:12:45,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:45,832 INFO L225 Difference]: With dead ends: 2768 [2023-02-15 01:12:45,832 INFO L226 Difference]: Without dead ends: 2768 [2023-02-15 01:12:45,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-15 01:12:45,833 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 427 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:45,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 616 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:12:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2023-02-15 01:12:45,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 1928. [2023-02-15 01:12:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1792 states have (on average 1.29296875) internal successors, (2317), 1829 states have internal predecessors, (2317), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-15 01:12:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2473 transitions. [2023-02-15 01:12:45,863 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2473 transitions. Word has length 45 [2023-02-15 01:12:45,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:45,863 INFO L495 AbstractCegarLoop]: Abstraction has 1928 states and 2473 transitions. [2023-02-15 01:12:45,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:12:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2473 transitions. [2023-02-15 01:12:45,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:12:45,864 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:45,864 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] [2023-02-15 01:12:45,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 01:12:46,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-15 01:12:46,069 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:46,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:46,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1536816849, now seen corresponding path program 1 times [2023-02-15 01:12:46,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:46,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754622659] [2023-02-15 01:12:46,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:46,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:46,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:46,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:46,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754622659] [2023-02-15 01:12:46,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754622659] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:12:46,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632769285] [2023-02-15 01:12:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:46,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:46,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:12:46,385 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:12:46,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 01:12:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:46,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 01:12:46,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:12:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:46,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:12:46,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632769285] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:46,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:12:46,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2023-02-15 01:12:46,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243976641] [2023-02-15 01:12:46,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:46,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:12:46,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:12:46,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-02-15 01:12:46,719 INFO L87 Difference]: Start difference. First operand 1928 states and 2473 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2023-02-15 01:12:46,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:46,855 INFO L93 Difference]: Finished difference Result 1976 states and 2504 transitions. [2023-02-15 01:12:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:12:46,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 45 [2023-02-15 01:12:46,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:46,860 INFO L225 Difference]: With dead ends: 1976 [2023-02-15 01:12:46,860 INFO L226 Difference]: Without dead ends: 1976 [2023-02-15 01:12:46,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-02-15 01:12:46,861 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 419 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:46,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 397 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2023-02-15 01:12:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2023-02-15 01:12:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1794 states have (on average 1.2931995540691192) internal successors, (2320), 1831 states have internal predecessors, (2320), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-15 01:12:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2476 transitions. [2023-02-15 01:12:46,885 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2476 transitions. Word has length 45 [2023-02-15 01:12:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:46,885 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 2476 transitions. [2023-02-15 01:12:46,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2023-02-15 01:12:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2476 transitions. [2023-02-15 01:12:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:12:46,886 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:46,886 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] [2023-02-15 01:12:46,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 01:12:47,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:47,093 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:47,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1536816787, now seen corresponding path program 1 times [2023-02-15 01:12:47,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:47,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754078691] [2023-02-15 01:12:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:47,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:47,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:47,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:47,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754078691] [2023-02-15 01:12:47,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754078691] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:12:47,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61464064] [2023-02-15 01:12:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:47,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:47,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:12:47,217 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:12:47,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 01:12:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:47,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 01:12:47,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:12:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:47,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:12:47,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61464064] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:47,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:12:47,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-02-15 01:12:47,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588392196] [2023-02-15 01:12:47,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:47,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:12:47,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:47,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:12:47,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-15 01:12:47,475 INFO L87 Difference]: Start difference. First operand 1930 states and 2476 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2023-02-15 01:12:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:47,595 INFO L93 Difference]: Finished difference Result 1975 states and 2502 transitions. [2023-02-15 01:12:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:12:47,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 45 [2023-02-15 01:12:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:47,605 INFO L225 Difference]: With dead ends: 1975 [2023-02-15 01:12:47,606 INFO L226 Difference]: Without dead ends: 1975 [2023-02-15 01:12:47,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:12:47,609 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 427 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:47,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 354 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:47,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2023-02-15 01:12:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1927. [2023-02-15 01:12:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1792 states have (on average 1.2918526785714286) internal successors, (2315), 1828 states have internal predecessors, (2315), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-15 01:12:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2471 transitions. [2023-02-15 01:12:47,631 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2471 transitions. Word has length 45 [2023-02-15 01:12:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:47,631 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2471 transitions. [2023-02-15 01:12:47,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2023-02-15 01:12:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2471 transitions. [2023-02-15 01:12:47,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 01:12:47,632 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:47,632 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] [2023-02-15 01:12:47,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 01:12:47,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-15 01:12:47,838 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:47,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1040806822, now seen corresponding path program 1 times [2023-02-15 01:12:47,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:47,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854910260] [2023-02-15 01:12:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:47,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:49,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:49,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:49,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854910260] [2023-02-15 01:12:49,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854910260] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:49,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:49,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 01:12:49,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217394708] [2023-02-15 01:12:49,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 01:12:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 01:12:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:12:49,205 INFO L87 Difference]: Start difference. First operand 1927 states and 2471 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2023-02-15 01:12:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:49,975 INFO L93 Difference]: Finished difference Result 1976 states and 2523 transitions. [2023-02-15 01:12:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 01:12:49,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 [2023-02-15 01:12:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:49,985 INFO L225 Difference]: With dead ends: 1976 [2023-02-15 01:12:49,986 INFO L226 Difference]: Without dead ends: 1976 [2023-02-15 01:12:49,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-02-15 01:12:49,987 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 103 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:49,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 717 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:12:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2023-02-15 01:12:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1957. [2023-02-15 01:12:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1822 states have (on average 1.2892425905598244) internal successors, (2349), 1858 states have internal predecessors, (2349), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-15 01:12:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 2505 transitions. [2023-02-15 01:12:50,015 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 2505 transitions. Word has length 48 [2023-02-15 01:12:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:50,015 INFO L495 AbstractCegarLoop]: Abstraction has 1957 states and 2505 transitions. [2023-02-15 01:12:50,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2023-02-15 01:12:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 2505 transitions. [2023-02-15 01:12:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 01:12:50,016 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:50,016 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] [2023-02-15 01:12:50,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-02-15 01:12:50,016 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:50,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1279480752, now seen corresponding path program 1 times [2023-02-15 01:12:50,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:50,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170124936] [2023-02-15 01:12:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:50,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:50,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:50,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:50,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170124936] [2023-02-15 01:12:50,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170124936] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:50,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:50,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 01:12:50,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579562999] [2023-02-15 01:12:50,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:50,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 01:12:50,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:50,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 01:12:50,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-15 01:12:50,175 INFO L87 Difference]: Start difference. First operand 1957 states and 2505 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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) [2023-02-15 01:12:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:50,364 INFO L93 Difference]: Finished difference Result 2179 states and 2767 transitions. [2023-02-15 01:12:50,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:12:50,367 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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 49 [2023-02-15 01:12:50,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:50,370 INFO L225 Difference]: With dead ends: 2179 [2023-02-15 01:12:50,370 INFO L226 Difference]: Without dead ends: 2179 [2023-02-15 01:12:50,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-02-15 01:12:50,371 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 1225 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:50,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 899 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:12:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2023-02-15 01:12:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1927. [2023-02-15 01:12:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1792 states have (on average 1.2756696428571428) internal successors, (2286), 1828 states have internal predecessors, (2286), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-15 01:12:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2442 transitions. [2023-02-15 01:12:50,392 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2442 transitions. Word has length 49 [2023-02-15 01:12:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:50,392 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2442 transitions. [2023-02-15 01:12:50,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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) [2023-02-15 01:12:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2442 transitions. [2023-02-15 01:12:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 01:12:50,393 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:50,393 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] [2023-02-15 01:12:50,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-02-15 01:12:50,394 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:50,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1385225816, now seen corresponding path program 1 times [2023-02-15 01:12:50,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:50,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433476409] [2023-02-15 01:12:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:50,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:50,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:50,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:50,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433476409] [2023-02-15 01:12:50,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433476409] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:50,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:50,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 01:12:50,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087852615] [2023-02-15 01:12:50,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:50,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 01:12:50,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:51,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 01:12:51,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-15 01:12:51,000 INFO L87 Difference]: Start difference. First operand 1927 states and 2442 transitions. Second operand has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 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) [2023-02-15 01:12:51,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:51,744 INFO L93 Difference]: Finished difference Result 2078 states and 2605 transitions. [2023-02-15 01:12:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 01:12:51,745 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 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 49 [2023-02-15 01:12:51,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:51,748 INFO L225 Difference]: With dead ends: 2078 [2023-02-15 01:12:51,748 INFO L226 Difference]: Without dead ends: 2078 [2023-02-15 01:12:51,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2023-02-15 01:12:51,752 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 1291 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:51,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 1034 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:12:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2023-02-15 01:12:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1796. [2023-02-15 01:12:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1664 states have (on average 1.28125) internal successors, (2132), 1699 states have internal predecessors, (2132), 73 states have call successors, (73), 33 states have call predecessors, (73), 33 states have return successors, (73), 63 states have call predecessors, (73), 73 states have call successors, (73) [2023-02-15 01:12:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2278 transitions. [2023-02-15 01:12:51,773 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2278 transitions. Word has length 49 [2023-02-15 01:12:51,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:51,774 INFO L495 AbstractCegarLoop]: Abstraction has 1796 states and 2278 transitions. [2023-02-15 01:12:51,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 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) [2023-02-15 01:12:51,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2278 transitions. [2023-02-15 01:12:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 01:12:51,775 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:51,775 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] [2023-02-15 01:12:51,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-02-15 01:12:51,775 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:51,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:51,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1385225817, now seen corresponding path program 1 times [2023-02-15 01:12:51,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:51,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304473136] [2023-02-15 01:12:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:51,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:52,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:52,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:52,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304473136] [2023-02-15 01:12:52,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304473136] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:52,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:52,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-02-15 01:12:52,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508065850] [2023-02-15 01:12:52,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:52,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 01:12:52,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:52,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 01:12:52,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-02-15 01:12:52,673 INFO L87 Difference]: Start difference. First operand 1796 states and 2278 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 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) [2023-02-15 01:12:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:54,360 INFO L93 Difference]: Finished difference Result 2635 states and 3366 transitions. [2023-02-15 01:12:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 01:12:54,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 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 49 [2023-02-15 01:12:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:54,364 INFO L225 Difference]: With dead ends: 2635 [2023-02-15 01:12:54,364 INFO L226 Difference]: Without dead ends: 2635 [2023-02-15 01:12:54,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=482, Invalid=1078, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 01:12:54,365 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 2261 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2261 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:54,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2261 Valid, 1262 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 01:12:54,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2023-02-15 01:12:54,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2000. [2023-02-15 01:12:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1852 states have (on average 1.2975161987041037) internal successors, (2403), 1891 states have internal predecessors, (2403), 83 states have call successors, (83), 39 states have call predecessors, (83), 39 states have return successors, (83), 69 states have call predecessors, (83), 83 states have call successors, (83) [2023-02-15 01:12:54,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2569 transitions. [2023-02-15 01:12:54,394 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2569 transitions. Word has length 49 [2023-02-15 01:12:54,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:54,394 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 2569 transitions. [2023-02-15 01:12:54,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 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) [2023-02-15 01:12:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2569 transitions. [2023-02-15 01:12:54,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 01:12:54,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:54,395 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] [2023-02-15 01:12:54,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-02-15 01:12:54,395 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:54,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1387072858, now seen corresponding path program 1 times [2023-02-15 01:12:54,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:54,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879442420] [2023-02-15 01:12:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:54,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:54,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:54,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879442420] [2023-02-15 01:12:54,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879442420] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:54,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:54,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 01:12:54,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106610287] [2023-02-15 01:12:54,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:54,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 01:12:54,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:54,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 01:12:54,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:12:54,716 INFO L87 Difference]: Start difference. First operand 2000 states and 2569 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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) [2023-02-15 01:12:55,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:55,275 INFO L93 Difference]: Finished difference Result 2610 states and 3303 transitions. [2023-02-15 01:12:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 01:12:55,277 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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 49 [2023-02-15 01:12:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:55,281 INFO L225 Difference]: With dead ends: 2610 [2023-02-15 01:12:55,281 INFO L226 Difference]: Without dead ends: 2610 [2023-02-15 01:12:55,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2023-02-15 01:12:55,284 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 934 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:55,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 1168 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:12:55,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2023-02-15 01:12:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 2254. [2023-02-15 01:12:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2074 states have (on average 1.2974927675988428) internal successors, (2691), 2133 states have internal predecessors, (2691), 109 states have call successors, (109), 45 states have call predecessors, (109), 45 states have return successors, (109), 75 states have call predecessors, (109), 109 states have call successors, (109) [2023-02-15 01:12:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2909 transitions. [2023-02-15 01:12:55,309 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2909 transitions. Word has length 49 [2023-02-15 01:12:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:55,309 INFO L495 AbstractCegarLoop]: Abstraction has 2254 states and 2909 transitions. [2023-02-15 01:12:55,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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) [2023-02-15 01:12:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2909 transitions. [2023-02-15 01:12:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 01:12:55,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:55,311 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] [2023-02-15 01:12:55,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-02-15 01:12:55,311 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:55,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1387072859, now seen corresponding path program 1 times [2023-02-15 01:12:55,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:55,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794176360] [2023-02-15 01:12:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:55,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:55,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:55,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:55,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794176360] [2023-02-15 01:12:55,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794176360] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:55,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:12:55,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 01:12:55,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463756627] [2023-02-15 01:12:55,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:55,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 01:12:55,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:55,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 01:12:55,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:12:55,805 INFO L87 Difference]: Start difference. First operand 2254 states and 2909 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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) [2023-02-15 01:12:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:56,440 INFO L93 Difference]: Finished difference Result 2745 states and 3475 transitions. [2023-02-15 01:12:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 01:12:56,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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 49 [2023-02-15 01:12:56,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:56,444 INFO L225 Difference]: With dead ends: 2745 [2023-02-15 01:12:56,444 INFO L226 Difference]: Without dead ends: 2745 [2023-02-15 01:12:56,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2023-02-15 01:12:56,446 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 946 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:56,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 883 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:12:56,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2023-02-15 01:12:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2447. [2023-02-15 01:12:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2251 states have (on average 1.3091959129275876) internal successors, (2947), 2314 states have internal predecessors, (2947), 119 states have call successors, (119), 51 states have call predecessors, (119), 51 states have return successors, (119), 81 states have call predecessors, (119), 119 states have call successors, (119) [2023-02-15 01:12:56,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3185 transitions. [2023-02-15 01:12:56,471 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3185 transitions. Word has length 49 [2023-02-15 01:12:56,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:56,472 INFO L495 AbstractCegarLoop]: Abstraction has 2447 states and 3185 transitions. [2023-02-15 01:12:56,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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) [2023-02-15 01:12:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3185 transitions. [2023-02-15 01:12:56,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 01:12:56,472 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:56,473 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] [2023-02-15 01:12:56,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-02-15 01:12:56,473 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash -7673948, now seen corresponding path program 1 times [2023-02-15 01:12:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:56,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144675352] [2023-02-15 01:12:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:56,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:56,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:56,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:56,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144675352] [2023-02-15 01:12:56,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144675352] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:12:56,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376623558] [2023-02-15 01:12:56,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:56,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:56,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:12:56,511 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:12:56,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 01:12:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:56,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 01:12:56,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:12:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:56,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:12:56,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376623558] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:12:56,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:12:56,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-02-15 01:12:56,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217826494] [2023-02-15 01:12:56,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:12:56,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:12:56,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:12:56,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:12:56,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:12:56,650 INFO L87 Difference]: Start difference. First operand 2447 states and 3185 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-02-15 01:12:56,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:12:56,668 INFO L93 Difference]: Finished difference Result 2964 states and 3885 transitions. [2023-02-15 01:12:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:12:56,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 50 [2023-02-15 01:12:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:12:56,672 INFO L225 Difference]: With dead ends: 2964 [2023-02-15 01:12:56,673 INFO L226 Difference]: Without dead ends: 2964 [2023-02-15 01:12:56,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:12:56,673 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 195 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:12:56,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 318 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:12:56,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2023-02-15 01:12:56,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2870. [2023-02-15 01:12:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2662 states have (on average 1.3260706235912847) internal successors, (3530), 2725 states have internal predecessors, (3530), 131 states have call successors, (131), 51 states have call predecessors, (131), 51 states have return successors, (131), 93 states have call predecessors, (131), 131 states have call successors, (131) [2023-02-15 01:12:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 3792 transitions. [2023-02-15 01:12:56,703 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 3792 transitions. Word has length 50 [2023-02-15 01:12:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:12:56,703 INFO L495 AbstractCegarLoop]: Abstraction has 2870 states and 3792 transitions. [2023-02-15 01:12:56,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-02-15 01:12:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 3792 transitions. [2023-02-15 01:12:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 01:12:56,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:12:56,704 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] [2023-02-15 01:12:56,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 01:12:56,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-15 01:12:56,909 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:12:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:12:56,910 INFO L85 PathProgramCache]: Analyzing trace with hash -384530648, now seen corresponding path program 1 times [2023-02-15 01:12:56,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:12:56,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990995041] [2023-02-15 01:12:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:56,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:12:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:57,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:12:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:57,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-15 01:12:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:12:57,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:12:57,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990995041] [2023-02-15 01:12:57,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990995041] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:12:57,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677526889] [2023-02-15 01:12:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:12:57,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:12:57,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:12:57,927 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:12:57,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 01:12:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:12:58,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-15 01:12:58,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:12:58,229 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 01:12:58,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 01:12:58,327 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 [2023-02-15 01:12:58,333 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 [2023-02-15 01:12:58,347 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 [2023-02-15 01:12:58,354 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 [2023-02-15 01:12:58,370 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 [2023-02-15 01:12:58,375 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 [2023-02-15 01:12:58,522 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2023-02-15 01:12:58,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2023-02-15 01:12:58,532 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2023-02-15 01:12:58,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2023-02-15 01:12:58,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:12:58,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:12:58,806 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:12:58,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:12:58,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2023-02-15 01:12:58,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:12:58,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2023-02-15 01:12:59,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:12:59,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:12:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:12:59,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:12:59,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2023-02-15 01:12:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:12:59,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:13:15,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677526889] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:13:15,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:13:15,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2023-02-15 01:13:15,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830588028] [2023-02-15 01:13:15,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:13:16,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 01:13:16,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:13:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 01:13:16,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2384, Unknown=6, NotChecked=0, Total=2550 [2023-02-15 01:13:16,001 INFO L87 Difference]: Start difference. First operand 2870 states and 3792 transitions. Second operand has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:13:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:13:22,604 INFO L93 Difference]: Finished difference Result 3280 states and 4241 transitions. [2023-02-15 01:13:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-15 01:13:22,605 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2023-02-15 01:13:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:13:22,609 INFO L225 Difference]: With dead ends: 3280 [2023-02-15 01:13:22,609 INFO L226 Difference]: Without dead ends: 3276 [2023-02-15 01:13:22,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1342, Invalid=8158, Unknown=6, NotChecked=0, Total=9506 [2023-02-15 01:13:22,611 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 2302 mSDsluCounter, 4435 mSDsCounter, 0 mSdLazyCounter, 2918 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2302 SdHoareTripleChecker+Valid, 4602 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 01:13:22,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2302 Valid, 4602 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2918 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 01:13:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2023-02-15 01:13:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2864. [2023-02-15 01:13:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2656 states have (on average 1.3226656626506024) internal successors, (3513), 2718 states have internal predecessors, (3513), 131 states have call successors, (131), 51 states have call predecessors, (131), 51 states have return successors, (131), 94 states have call predecessors, (131), 131 states have call successors, (131) [2023-02-15 01:13:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 3775 transitions. [2023-02-15 01:13:22,647 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 3775 transitions. Word has length 51 [2023-02-15 01:13:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:13:22,647 INFO L495 AbstractCegarLoop]: Abstraction has 2864 states and 3775 transitions. [2023-02-15 01:13:22,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:13:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 3775 transitions. [2023-02-15 01:13:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 01:13:22,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:13:22,648 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] [2023-02-15 01:13:22,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 01:13:22,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-15 01:13:22,854 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:13:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:13:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash -987996839, now seen corresponding path program 1 times [2023-02-15 01:13:22,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:13:22,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592713056] [2023-02-15 01:13:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:22,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:13:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:22,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:13:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:13:22,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:13:22,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592713056] [2023-02-15 01:13:22,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592713056] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:13:22,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:13:22,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:13:22,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433585036] [2023-02-15 01:13:22,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:13:22,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:13:22,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:13:22,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:13:22,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:13:22,941 INFO L87 Difference]: Start difference. First operand 2864 states and 3775 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2023-02-15 01:13:22,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:13:22,959 INFO L93 Difference]: Finished difference Result 3639 states and 4858 transitions. [2023-02-15 01:13:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:13:22,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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 [2023-02-15 01:13:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:13:22,969 INFO L225 Difference]: With dead ends: 3639 [2023-02-15 01:13:22,969 INFO L226 Difference]: Without dead ends: 3639 [2023-02-15 01:13:22,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:13:22,970 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 116 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:13:22,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 441 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:13:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2023-02-15 01:13:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2490. [2023-02-15 01:13:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2306 states have (on average 1.303122289679098) internal successors, (3005), 2364 states have internal predecessors, (3005), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-15 01:13:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3237 transitions. [2023-02-15 01:13:22,998 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3237 transitions. Word has length 51 [2023-02-15 01:13:22,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:13:22,998 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3237 transitions. [2023-02-15 01:13:22,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2023-02-15 01:13:22,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3237 transitions. [2023-02-15 01:13:22,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 01:13:22,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:13:22,999 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] [2023-02-15 01:13:22,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-02-15 01:13:23,000 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:13:23,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:13:23,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1781712484, now seen corresponding path program 1 times [2023-02-15 01:13:23,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:13:23,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139249704] [2023-02-15 01:13:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:23,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:13:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:23,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:13:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:13:23,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:13:23,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139249704] [2023-02-15 01:13:23,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139249704] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:13:23,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860640496] [2023-02-15 01:13:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:23,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:13:23,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:13:23,096 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:13:23,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 01:13:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:23,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 01:13:23,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:13:23,412 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:13:23,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-02-15 01:13:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 01:13:23,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:13:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 01:13:23,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860640496] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:13:23,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:13:23,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2023-02-15 01:13:23,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391410797] [2023-02-15 01:13:23,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:13:23,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 01:13:23,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:13:23,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 01:13:23,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:13:23,582 INFO L87 Difference]: Start difference. First operand 2490 states and 3237 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:13:24,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:13:24,129 INFO L93 Difference]: Finished difference Result 3674 states and 4798 transitions. [2023-02-15 01:13:24,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 01:13:24,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2023-02-15 01:13:24,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:13:24,136 INFO L225 Difference]: With dead ends: 3674 [2023-02-15 01:13:24,136 INFO L226 Difference]: Without dead ends: 3666 [2023-02-15 01:13:24,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-02-15 01:13:24,137 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 470 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:13:24,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1382 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:13:24,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2023-02-15 01:13:24,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 2502. [2023-02-15 01:13:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2318 states have (on average 1.3002588438308886) internal successors, (3014), 2376 states have internal predecessors, (3014), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-15 01:13:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 3246 transitions. [2023-02-15 01:13:24,164 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 3246 transitions. Word has length 52 [2023-02-15 01:13:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:13:24,165 INFO L495 AbstractCegarLoop]: Abstraction has 2502 states and 3246 transitions. [2023-02-15 01:13:24,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:13:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 3246 transitions. [2023-02-15 01:13:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 01:13:24,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:13:24,166 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] [2023-02-15 01:13:24,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 01:13:24,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-15 01:13:24,371 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:13:24,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:13:24,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1216726984, now seen corresponding path program 1 times [2023-02-15 01:13:24,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:13:24,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608523158] [2023-02-15 01:13:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:13:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:24,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:13:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:13:24,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:13:24,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608523158] [2023-02-15 01:13:24,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608523158] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:13:24,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:13:24,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-15 01:13:24,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605568755] [2023-02-15 01:13:24,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:13:24,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 01:13:24,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:13:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 01:13:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:13:24,942 INFO L87 Difference]: Start difference. First operand 2502 states and 3246 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 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) [2023-02-15 01:13:25,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:13:25,577 INFO L93 Difference]: Finished difference Result 2673 states and 3431 transitions. [2023-02-15 01:13:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 01:13:25,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 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 [2023-02-15 01:13:25,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:13:25,589 INFO L225 Difference]: With dead ends: 2673 [2023-02-15 01:13:25,590 INFO L226 Difference]: Without dead ends: 2673 [2023-02-15 01:13:25,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2023-02-15 01:13:25,590 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 1207 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:13:25,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 917 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:13:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2023-02-15 01:13:25,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2516. [2023-02-15 01:13:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2332 states have (on average 1.300171526586621) internal successors, (3032), 2390 states have internal predecessors, (3032), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-15 01:13:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3264 transitions. [2023-02-15 01:13:25,620 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3264 transitions. Word has length 52 [2023-02-15 01:13:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:13:25,620 INFO L495 AbstractCegarLoop]: Abstraction has 2516 states and 3264 transitions. [2023-02-15 01:13:25,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 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) [2023-02-15 01:13:25,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3264 transitions. [2023-02-15 01:13:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 01:13:25,622 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:13:25,622 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] [2023-02-15 01:13:25,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-02-15 01:13:25,622 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:13:25,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:13:25,622 INFO L85 PathProgramCache]: Analyzing trace with hash 407380358, now seen corresponding path program 1 times [2023-02-15 01:13:25,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:13:25,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737751531] [2023-02-15 01:13:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:25,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:13:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:25,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:13:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:13:26,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:13:26,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737751531] [2023-02-15 01:13:26,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737751531] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:13:26,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:13:26,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 01:13:26,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509022618] [2023-02-15 01:13:26,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:13:26,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 01:13:26,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:13:26,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 01:13:26,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:13:26,001 INFO L87 Difference]: Start difference. First operand 2516 states and 3264 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) [2023-02-15 01:13:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:13:26,561 INFO L93 Difference]: Finished difference Result 2880 states and 3681 transitions. [2023-02-15 01:13:26,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 01:13:26,562 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 [2023-02-15 01:13:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:13:26,564 INFO L225 Difference]: With dead ends: 2880 [2023-02-15 01:13:26,565 INFO L226 Difference]: Without dead ends: 2880 [2023-02-15 01:13:26,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2023-02-15 01:13:26,565 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 984 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:13:26,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 894 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:13:26,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2023-02-15 01:13:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2503. [2023-02-15 01:13:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2319 states have (on average 1.3001293661060802) internal successors, (3015), 2377 states have internal predecessors, (3015), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-15 01:13:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3247 transitions. [2023-02-15 01:13:26,585 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3247 transitions. Word has length 52 [2023-02-15 01:13:26,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:13:26,585 INFO L495 AbstractCegarLoop]: Abstraction has 2503 states and 3247 transitions. [2023-02-15 01:13:26,586 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) [2023-02-15 01:13:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3247 transitions. [2023-02-15 01:13:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 01:13:26,586 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:13:26,586 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] [2023-02-15 01:13:26,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-02-15 01:13:26,587 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:13:26,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:13:26,587 INFO L85 PathProgramCache]: Analyzing trace with hash -159124908, now seen corresponding path program 1 times [2023-02-15 01:13:26,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:13:26,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922629701] [2023-02-15 01:13:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:26,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:13:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:26,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:13:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:26,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-15 01:13:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:13:26,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:13:26,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922629701] [2023-02-15 01:13:26,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922629701] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:13:26,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198688137] [2023-02-15 01:13:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:26,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:13:26,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:13:26,783 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:13:26,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 01:13:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 01:13:26,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:13:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:13:27,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:13:27,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198688137] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:13:27,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:13:27,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 15 [2023-02-15 01:13:27,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051529143] [2023-02-15 01:13:27,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:13:27,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 01:13:27,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:13:27,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 01:13:27,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-02-15 01:13:27,160 INFO L87 Difference]: Start difference. First operand 2503 states and 3247 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:13:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:13:27,477 INFO L93 Difference]: Finished difference Result 2911 states and 3718 transitions. [2023-02-15 01:13:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:13:27,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2023-02-15 01:13:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:13:27,481 INFO L225 Difference]: With dead ends: 2911 [2023-02-15 01:13:27,481 INFO L226 Difference]: Without dead ends: 2911 [2023-02-15 01:13:27,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-02-15 01:13:27,482 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 439 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:13:27,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 475 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:13:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2023-02-15 01:13:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2501. [2023-02-15 01:13:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2319 states have (on average 1.2923673997412677) internal successors, (2997), 2375 states have internal predecessors, (2997), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-15 01:13:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 3229 transitions. [2023-02-15 01:13:27,508 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 3229 transitions. Word has length 53 [2023-02-15 01:13:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:13:27,509 INFO L495 AbstractCegarLoop]: Abstraction has 2501 states and 3229 transitions. [2023-02-15 01:13:27,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:13:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 3229 transitions. [2023-02-15 01:13:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 01:13:27,510 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:13:27,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:13:27,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 01:13:27,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:13:27,716 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:13:27,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:13:27,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2046489697, now seen corresponding path program 1 times [2023-02-15 01:13:27,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:13:27,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116703439] [2023-02-15 01:13:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:27,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:13:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:28,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:13:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:28,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 01:13:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 01:13:28,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:13:28,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116703439] [2023-02-15 01:13:28,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116703439] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:13:28,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308531199] [2023-02-15 01:13:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:28,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:13:28,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:13:28,494 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:13:28,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 01:13:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:28,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-15 01:13:28,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:13:28,807 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 01:13:28,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 01:13:28,914 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 [2023-02-15 01:13:28,920 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 [2023-02-15 01:13:28,937 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 [2023-02-15 01:13:28,944 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 [2023-02-15 01:13:28,955 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 [2023-02-15 01:13:28,971 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 [2023-02-15 01:13:29,154 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 01:13:29,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2023-02-15 01:13:29,166 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 01:13:29,166 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 23 treesize of output 30 [2023-02-15 01:13:29,267 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:13:29,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2023-02-15 01:13:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:13:29,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2023-02-15 01:13:29,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:13:29,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2023-02-15 01:13:29,649 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-15 01:13:29,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-02-15 01:13:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:13:29,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:13:29,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308531199] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:13:29,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:13:29,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 32 [2023-02-15 01:13:29,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144398279] [2023-02-15 01:13:29,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:13:29,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 01:13:29,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:13:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 01:13:29,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 01:13:29,856 INFO L87 Difference]: Start difference. First operand 2501 states and 3229 transitions. Second operand has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:13:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:13:32,772 INFO L93 Difference]: Finished difference Result 4064 states and 5287 transitions. [2023-02-15 01:13:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-15 01:13:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2023-02-15 01:13:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:13:32,778 INFO L225 Difference]: With dead ends: 4064 [2023-02-15 01:13:32,778 INFO L226 Difference]: Without dead ends: 4064 [2023-02-15 01:13:32,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=979, Invalid=5183, Unknown=0, NotChecked=0, Total=6162 [2023-02-15 01:13:32,779 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 2225 mSDsluCounter, 3554 mSDsCounter, 0 mSdLazyCounter, 2821 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2229 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:13:32,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2229 Valid, 3800 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2821 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 01:13:32,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2023-02-15 01:13:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 2637. [2023-02-15 01:13:32,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2445 states have (on average 1.2834355828220858) internal successors, (3138), 2505 states have internal predecessors, (3138), 124 states have call successors, (124), 44 states have call predecessors, (124), 44 states have return successors, (124), 87 states have call predecessors, (124), 124 states have call successors, (124) [2023-02-15 01:13:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3386 transitions. [2023-02-15 01:13:32,813 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3386 transitions. Word has length 53 [2023-02-15 01:13:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:13:32,814 INFO L495 AbstractCegarLoop]: Abstraction has 2637 states and 3386 transitions. [2023-02-15 01:13:32,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:13:32,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3386 transitions. [2023-02-15 01:13:32,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 01:13:32,815 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:13:32,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:13:32,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 01:13:33,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-02-15 01:13:33,021 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:13:33,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:13:33,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2046489696, now seen corresponding path program 1 times [2023-02-15 01:13:33,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:13:33,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960451896] [2023-02-15 01:13:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:33,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:13:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:34,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:13:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:34,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 01:13:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 01:13:34,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:13:34,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960451896] [2023-02-15 01:13:34,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960451896] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:13:34,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021497322] [2023-02-15 01:13:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:34,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:13:34,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:13:34,331 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:13:34,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 01:13:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:34,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-15 01:13:34,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:13:34,632 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 01:13:34,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 01:13:34,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:13:34,771 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 [2023-02-15 01:13:34,782 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 [2023-02-15 01:13:34,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 01:13:34,804 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 [2023-02-15 01:13:34,822 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 [2023-02-15 01:13:34,828 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 [2023-02-15 01:13:35,062 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 01:13:35,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2023-02-15 01:13:35,075 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-02-15 01:13:35,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2023-02-15 01:13:35,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:13:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:13:35,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 37 [2023-02-15 01:13:35,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:13:35,440 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 23 treesize of output 22 [2023-02-15 01:13:35,732 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:13:35,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-02-15 01:13:35,736 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:13:35,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2023-02-15 01:13:35,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:13:35,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:13:35,787 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-15 01:13:35,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:13:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:13:35,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:13:38,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021497322] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:13:38,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:13:38,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 36 [2023-02-15 01:13:38,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751681605] [2023-02-15 01:13:38,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:13:38,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 01:13:38,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:13:38,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 01:13:38,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 01:13:38,239 INFO L87 Difference]: Start difference. First operand 2637 states and 3386 transitions. Second operand has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:13:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:13:45,341 INFO L93 Difference]: Finished difference Result 5255 states and 6918 transitions. [2023-02-15 01:13:45,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-15 01:13:45,342 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2023-02-15 01:13:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:13:45,348 INFO L225 Difference]: With dead ends: 5255 [2023-02-15 01:13:45,348 INFO L226 Difference]: Without dead ends: 5255 [2023-02-15 01:13:45,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1564, Invalid=8536, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 01:13:45,349 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 3421 mSDsluCounter, 4917 mSDsCounter, 0 mSdLazyCounter, 4631 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3425 SdHoareTripleChecker+Valid, 5196 SdHoareTripleChecker+Invalid, 4837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 4631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-15 01:13:45,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3425 Valid, 5196 Invalid, 4837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 4631 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-02-15 01:13:45,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2023-02-15 01:13:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 2685. [2023-02-15 01:13:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2493 states have (on average 1.2691536301644606) internal successors, (3164), 2549 states have internal predecessors, (3164), 124 states have call successors, (124), 44 states have call predecessors, (124), 44 states have return successors, (124), 91 states have call predecessors, (124), 124 states have call successors, (124) [2023-02-15 01:13:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 3412 transitions. [2023-02-15 01:13:45,386 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 3412 transitions. Word has length 53 [2023-02-15 01:13:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:13:45,387 INFO L495 AbstractCegarLoop]: Abstraction has 2685 states and 3412 transitions. [2023-02-15 01:13:45,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:13:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 3412 transitions. [2023-02-15 01:13:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 01:13:45,388 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:13:45,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:13:45,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 01:13:45,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:13:45,601 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:13:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:13:45,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2096673869, now seen corresponding path program 1 times [2023-02-15 01:13:45,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:13:45,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607540720] [2023-02-15 01:13:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:45,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:13:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:45,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 01:13:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:45,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 01:13:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:13:45,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:13:45,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607540720] [2023-02-15 01:13:45,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607540720] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:13:45,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969619447] [2023-02-15 01:13:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:45,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:13:45,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:13:45,734 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:13:45,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 01:13:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:45,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 01:13:45,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:13:45,956 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:13:45,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 01:13:45,959 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:13:45,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 01:13:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:13:46,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:13:46,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969619447] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:13:46,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:13:46,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-02-15 01:13:46,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005079787] [2023-02-15 01:13:46,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:13:46,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 01:13:46,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:13:46,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 01:13:46,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:13:46,009 INFO L87 Difference]: Start difference. First operand 2685 states and 3412 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:13:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:13:46,271 INFO L93 Difference]: Finished difference Result 2540 states and 3177 transitions. [2023-02-15 01:13:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 01:13:46,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-02-15 01:13:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:13:46,274 INFO L225 Difference]: With dead ends: 2540 [2023-02-15 01:13:46,274 INFO L226 Difference]: Without dead ends: 2540 [2023-02-15 01:13:46,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-02-15 01:13:46,275 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 222 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:13:46,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 1017 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:13:46,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2023-02-15 01:13:46,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2130. [2023-02-15 01:13:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 1978 states have (on average 1.2553083923154702) internal successors, (2483), 2024 states have internal predecessors, (2483), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 76 states have call predecessors, (99), 99 states have call successors, (99) [2023-02-15 01:13:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2681 transitions. [2023-02-15 01:13:46,295 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2681 transitions. Word has length 54 [2023-02-15 01:13:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:13:46,296 INFO L495 AbstractCegarLoop]: Abstraction has 2130 states and 2681 transitions. [2023-02-15 01:13:46,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:13:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2681 transitions. [2023-02-15 01:13:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 01:13:46,297 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:13:46,297 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:13:46,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 01:13:46,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:13:46,503 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:13:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:13:46,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2010110243, now seen corresponding path program 1 times [2023-02-15 01:13:46,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:13:46,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020468082] [2023-02-15 01:13:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:46,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:13:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:46,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:13:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:13:46,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:13:46,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020468082] [2023-02-15 01:13:46,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020468082] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:13:46,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234024121] [2023-02-15 01:13:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:46,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:13:46,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:13:46,550 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:13:46,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 01:13:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:46,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 01:13:46,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:13:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:13:46,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:13:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:13:46,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234024121] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:13:46,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:13:46,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-02-15 01:13:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216205176] [2023-02-15 01:13:46,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:13:46,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 01:13:46,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:13:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 01:13:46,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:13:46,788 INFO L87 Difference]: Start difference. First operand 2130 states and 2681 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2023-02-15 01:13:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:13:46,817 INFO L93 Difference]: Finished difference Result 4141 states and 5286 transitions. [2023-02-15 01:13:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 01:13:46,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 55 [2023-02-15 01:13:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:13:46,822 INFO L225 Difference]: With dead ends: 4141 [2023-02-15 01:13:46,823 INFO L226 Difference]: Without dead ends: 4141 [2023-02-15 01:13:46,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:13:46,823 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 270 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:13:46,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 596 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:13:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2023-02-15 01:13:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3226. [2023-02-15 01:13:46,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 3026 states have (on average 1.2785855915399869) internal successors, (3869), 3078 states have internal predecessors, (3869), 147 states have call successors, (147), 29 states have call predecessors, (147), 29 states have return successors, (147), 118 states have call predecessors, (147), 147 states have call successors, (147) [2023-02-15 01:13:46,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 4163 transitions. [2023-02-15 01:13:46,858 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 4163 transitions. Word has length 55 [2023-02-15 01:13:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:13:46,858 INFO L495 AbstractCegarLoop]: Abstraction has 3226 states and 4163 transitions. [2023-02-15 01:13:46,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2023-02-15 01:13:46,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 4163 transitions. [2023-02-15 01:13:46,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 01:13:46,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:13:46,859 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, 1, 1, 1] [2023-02-15 01:13:46,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 01:13:47,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-02-15 01:13:47,065 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 01:13:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:13:47,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2111090623, now seen corresponding path program 1 times [2023-02-15 01:13:47,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:13:47,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260234594] [2023-02-15 01:13:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:47,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:13:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:47,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 01:13:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:13:47,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:13:47,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260234594] [2023-02-15 01:13:47,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260234594] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:13:47,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059556407] [2023-02-15 01:13:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:13:47,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:13:47,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:13:47,813 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:13:47,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 01:13:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:13:47,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 01:13:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:13:48,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 01:13:48,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:13:48,449 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 43 treesize of output 34 [2023-02-15 01:13:48,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2023-02-15 01:13:48,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 01:13:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:13:48,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:13:48,720 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1324 Int)) (= (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1324)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2023-02-15 01:13:48,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 142 [2023-02-15 01:15:49,686 WARN L233 SmtUtils]: Spent 2.01m on a formula simplification. DAG size of input: 73 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 01:16:33,349 WARN L233 SmtUtils]: Spent 39.59s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)