./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0217_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext-properties/test-0217_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 e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 21:00:32,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 21:00:32,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 21:00:32,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 21:00:32,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 21:00:32,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 21:00:32,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 21:00:32,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 21:00:32,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 21:00:32,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 21:00:32,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 21:00:32,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 21:00:32,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 21:00:32,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 21:00:32,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 21:00:32,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 21:00:32,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 21:00:32,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 21:00:32,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 21:00:32,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 21:00:32,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 21:00:32,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 21:00:32,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 21:00:32,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 21:00:32,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 21:00:32,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 21:00:32,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 21:00:32,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 21:00:32,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 21:00:32,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 21:00:32,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 21:00:32,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 21:00:32,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 21:00:32,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 21:00:32,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 21:00:32,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 21:00:32,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 21:00:32,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 21:00:32,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 21:00:32,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 21:00:32,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 21:00:32,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 21:00:32,582 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 21:00:32,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 21:00:32,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 21:00:32,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 21:00:32,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 21:00:32,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 21:00:32,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 21:00:32,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 21:00:32,584 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 21:00:32,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 21:00:32,585 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 21:00:32,585 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 21:00:32,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 21:00:32,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 21:00:32,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 21:00:32,586 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 21:00:32,586 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 21:00:32,586 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 21:00:32,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 21:00:32,586 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 21:00:32,586 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 21:00:32,587 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 21:00:32,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 21:00:32,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 21:00:32,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 21:00:32,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 21:00:32,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 21:00:32,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 21:00:32,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 21:00:32,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 21:00:32,588 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 21:00:32,588 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 21:00:32,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 21:00:32,589 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 21:00:32,589 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2023-02-18 21:00:32,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 21:00:32,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 21:00:32,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 21:00:32,844 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 21:00:32,844 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 21:00:32,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0217_1.i [2023-02-18 21:00:33,935 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 21:00:34,137 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 21:00:34,138 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2023-02-18 21:00:34,150 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9019ad252/0c900c7bc6a24bb7be47446d6c80e7be/FLAG8f666106f [2023-02-18 21:00:34,161 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9019ad252/0c900c7bc6a24bb7be47446d6c80e7be [2023-02-18 21:00:34,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 21:00:34,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 21:00:34,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 21:00:34,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 21:00:34,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 21:00:34,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd6c62e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34, skipping insertion in model container [2023-02-18 21:00:34,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 21:00:34,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 21:00:34,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 21:00:34,444 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 21:00:34,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 21:00:34,541 INFO L208 MainTranslator]: Completed translation [2023-02-18 21:00:34,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34 WrapperNode [2023-02-18 21:00:34,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 21:00:34,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 21:00:34,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 21:00:34,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 21:00:34,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,634 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 249 [2023-02-18 21:00:34,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 21:00:34,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 21:00:34,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 21:00:34,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 21:00:34,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,708 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 21:00:34,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 21:00:34,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 21:00:34,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 21:00:34,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34" (1/1) ... [2023-02-18 21:00:34,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 21:00:34,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:00:34,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 21:00:34,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 21:00:34,783 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-02-18 21:00:34,784 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-02-18 21:00:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 21:00:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 21:00:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 21:00:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 21:00:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 21:00:34,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 21:00:34,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 21:00:34,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 21:00:34,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 21:00:34,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 21:00:34,943 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 21:00:34,958 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 21:00:35,286 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 21:00:35,293 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 21:00:35,294 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-18 21:00:35,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:00:35 BoogieIcfgContainer [2023-02-18 21:00:35,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 21:00:35,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 21:00:35,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 21:00:35,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 21:00:35,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 09:00:34" (1/3) ... [2023-02-18 21:00:35,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd782e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:00:35, skipping insertion in model container [2023-02-18 21:00:35,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:00:34" (2/3) ... [2023-02-18 21:00:35,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd782e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:00:35, skipping insertion in model container [2023-02-18 21:00:35,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:00:35" (3/3) ... [2023-02-18 21:00:35,302 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2023-02-18 21:00:35,320 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 21:00:35,320 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2023-02-18 21:00:35,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 21:00:35,353 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;@1fcb3f56, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 21:00:35,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-02-18 21:00:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 166 states have internal predecessors, (195), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:00:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 21:00:35,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:35,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 21:00:35,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:35,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:35,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1045674122, now seen corresponding path program 1 times [2023-02-18 21:00:35,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:35,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859570607] [2023-02-18 21:00:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:35,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:35,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:35,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859570607] [2023-02-18 21:00:35,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859570607] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:35,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:35,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 21:00:35,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968204700] [2023-02-18 21:00:35,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:35,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 21:00:35,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:35,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 21:00:35,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 21:00:35,501 INFO L87 Difference]: Start difference. First operand has 170 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 166 states have internal predecessors, (195), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:00:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:35,519 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2023-02-18 21:00:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 21:00:35,521 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-18 21:00:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:35,526 INFO L225 Difference]: With dead ends: 170 [2023-02-18 21:00:35,526 INFO L226 Difference]: Without dead ends: 168 [2023-02-18 21:00:35,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 21:00:35,529 INFO L413 NwaCegarLoop]: 192 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, 192 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:35,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:00:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-18 21:00:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-02-18 21:00:35,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 98 states have (on average 1.8979591836734695) internal successors, (186), 164 states have internal predecessors, (186), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:00:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2023-02-18 21:00:35,557 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 6 [2023-02-18 21:00:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:35,558 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2023-02-18 21:00:35,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:00:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2023-02-18 21:00:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 21:00:35,558 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:35,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:35,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 21:00:35,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:35,560 INFO L85 PathProgramCache]: Analyzing trace with hash 594374512, now seen corresponding path program 1 times [2023-02-18 21:00:35,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:35,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025333457] [2023-02-18 21:00:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:35,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:35,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:35,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025333457] [2023-02-18 21:00:35,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025333457] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:35,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:35,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:00:35,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577242842] [2023-02-18 21:00:35,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:35,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:00:35,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:35,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:00:35,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:35,642 INFO L87 Difference]: Start difference. First operand 168 states and 190 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2023-02-18 21:00:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:35,682 INFO L93 Difference]: Finished difference Result 331 states and 375 transitions. [2023-02-18 21:00:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:00:35,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2023-02-18 21:00:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:35,684 INFO L225 Difference]: With dead ends: 331 [2023-02-18 21:00:35,684 INFO L226 Difference]: Without dead ends: 331 [2023-02-18 21:00:35,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:00:35,685 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 180 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:35,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 697 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:00:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-02-18 21:00:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 170. [2023-02-18 21:00:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 100 states have (on average 1.88) internal successors, (188), 166 states have internal predecessors, (188), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:00:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2023-02-18 21:00:35,697 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 8 [2023-02-18 21:00:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:35,697 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2023-02-18 21:00:35,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2023-02-18 21:00:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2023-02-18 21:00:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 21:00:35,698 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:35,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:35,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 21:00:35,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:35,699 INFO L85 PathProgramCache]: Analyzing trace with hash 592527470, now seen corresponding path program 1 times [2023-02-18 21:00:35,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:35,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837624530] [2023-02-18 21:00:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:35,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:35,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:35,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837624530] [2023-02-18 21:00:35,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837624530] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:35,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:35,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-18 21:00:35,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593160601] [2023-02-18 21:00:35,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:35,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 21:00:35,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:35,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 21:00:35,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:00:35,787 INFO L87 Difference]: Start difference. First operand 170 states and 192 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) [2023-02-18 21:00:35,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:35,937 INFO L93 Difference]: Finished difference Result 329 states and 372 transitions. [2023-02-18 21:00:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 21:00:35,937 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 [2023-02-18 21:00:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:35,941 INFO L225 Difference]: With dead ends: 329 [2023-02-18 21:00:35,941 INFO L226 Difference]: Without dead ends: 329 [2023-02-18 21:00:35,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:00:35,948 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 170 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:35,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 249 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-18 21:00:35,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 237. [2023-02-18 21:00:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 164 states have (on average 1.8658536585365855) internal successors, (306), 230 states have internal predecessors, (306), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 21:00:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 314 transitions. [2023-02-18 21:00:35,973 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 314 transitions. Word has length 8 [2023-02-18 21:00:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:35,973 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 314 transitions. [2023-02-18 21:00:35,974 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) [2023-02-18 21:00:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 314 transitions. [2023-02-18 21:00:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 21:00:35,974 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:35,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:35,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 21:00:35,974 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:35,975 INFO L85 PathProgramCache]: Analyzing trace with hash 592527471, now seen corresponding path program 1 times [2023-02-18 21:00:35,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:35,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62515482] [2023-02-18 21:00:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:35,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:36,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:36,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62515482] [2023-02-18 21:00:36,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62515482] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:36,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:36,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 21:00:36,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090336797] [2023-02-18 21:00:36,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:36,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:00:36,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:36,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:00:36,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:36,081 INFO L87 Difference]: Start difference. First operand 237 states and 314 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) [2023-02-18 21:00:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:36,248 INFO L93 Difference]: Finished difference Result 384 states and 490 transitions. [2023-02-18 21:00:36,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:00:36,249 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 [2023-02-18 21:00:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:36,250 INFO L225 Difference]: With dead ends: 384 [2023-02-18 21:00:36,250 INFO L226 Difference]: Without dead ends: 384 [2023-02-18 21:00:36,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:36,258 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 123 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:36,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 412 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:00:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-02-18 21:00:36,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2023-02-18 21:00:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 239 states have (on average 1.8284518828451883) internal successors, (437), 307 states have internal predecessors, (437), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 21:00:36,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2023-02-18 21:00:36,274 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 8 [2023-02-18 21:00:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:36,274 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2023-02-18 21:00:36,275 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) [2023-02-18 21:00:36,275 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2023-02-18 21:00:36,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 21:00:36,275 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:36,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:36,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 21:00:36,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash 592527533, now seen corresponding path program 1 times [2023-02-18 21:00:36,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:36,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114996144] [2023-02-18 21:00:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:36,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:36,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:36,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114996144] [2023-02-18 21:00:36,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114996144] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:36,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:36,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 21:00:36,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619003190] [2023-02-18 21:00:36,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:36,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:00:36,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:36,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:00:36,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:36,348 INFO L87 Difference]: Start difference. First operand 318 states and 453 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) [2023-02-18 21:00:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:36,495 INFO L93 Difference]: Finished difference Result 383 states and 488 transitions. [2023-02-18 21:00:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:00:36,496 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 [2023-02-18 21:00:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:36,497 INFO L225 Difference]: With dead ends: 383 [2023-02-18 21:00:36,497 INFO L226 Difference]: Without dead ends: 383 [2023-02-18 21:00:36,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:36,498 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 122 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:36,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 382 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-18 21:00:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 318. [2023-02-18 21:00:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 239 states have (on average 1.8284518828451883) internal successors, (437), 307 states have internal predecessors, (437), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 21:00:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2023-02-18 21:00:36,508 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 8 [2023-02-18 21:00:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:36,508 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2023-02-18 21:00:36,508 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) [2023-02-18 21:00:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2023-02-18 21:00:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 21:00:36,509 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:36,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:36,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 21:00:36,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:36,510 INFO L85 PathProgramCache]: Analyzing trace with hash -329469321, now seen corresponding path program 1 times [2023-02-18 21:00:36,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:36,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326780927] [2023-02-18 21:00:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:36,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:36,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:36,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326780927] [2023-02-18 21:00:36,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326780927] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:36,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:36,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:00:36,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157061778] [2023-02-18 21:00:36,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:36,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 21:00:36,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 21:00:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:00:36,531 INFO L87 Difference]: Start difference. First operand 318 states and 453 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) [2023-02-18 21:00:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:36,541 INFO L93 Difference]: Finished difference Result 459 states and 609 transitions. [2023-02-18 21:00:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 21:00:36,541 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 [2023-02-18 21:00:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:36,543 INFO L225 Difference]: With dead ends: 459 [2023-02-18 21:00:36,543 INFO L226 Difference]: Without dead ends: 459 [2023-02-18 21:00:36,543 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 [2023-02-18 21:00:36,544 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 161 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 372 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 [2023-02-18 21:00:36,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 372 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:00:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-02-18 21:00:36,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 320. [2023-02-18 21:00:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 241 states have (on average 1.8132780082987552) internal successors, (437), 309 states have internal predecessors, (437), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 21:00:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 453 transitions. [2023-02-18 21:00:36,551 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 453 transitions. Word has length 11 [2023-02-18 21:00:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:36,551 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 453 transitions. [2023-02-18 21:00:36,551 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) [2023-02-18 21:00:36,551 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 453 transitions. [2023-02-18 21:00:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 21:00:36,552 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:36,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:36,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 21:00:36,552 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:36,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1623615594, now seen corresponding path program 1 times [2023-02-18 21:00:36,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:36,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395789695] [2023-02-18 21:00:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:36,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:36,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:36,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395789695] [2023-02-18 21:00:36,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395789695] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:36,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:36,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 21:00:36,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908282285] [2023-02-18 21:00:36,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:36,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 21:00:36,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:36,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 21:00:36,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:00:36,569 INFO L87 Difference]: Start difference. First operand 320 states and 453 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) [2023-02-18 21:00:36,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:36,643 INFO L93 Difference]: Finished difference Result 371 states and 500 transitions. [2023-02-18 21:00:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 21:00:36,644 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 [2023-02-18 21:00:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:36,646 INFO L225 Difference]: With dead ends: 371 [2023-02-18 21:00:36,646 INFO L226 Difference]: Without dead ends: 364 [2023-02-18 21:00:36,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:00:36,647 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 71 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:36,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 287 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-02-18 21:00:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 317. [2023-02-18 21:00:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 238 states have (on average 1.815126050420168) internal successors, (432), 306 states have internal predecessors, (432), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 21:00:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 448 transitions. [2023-02-18 21:00:36,653 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 448 transitions. Word has length 12 [2023-02-18 21:00:36,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:36,653 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 448 transitions. [2023-02-18 21:00:36,653 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) [2023-02-18 21:00:36,653 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 448 transitions. [2023-02-18 21:00:36,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 21:00:36,654 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:36,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:36,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 21:00:36,654 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:36,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:36,655 INFO L85 PathProgramCache]: Analyzing trace with hash -321333405, now seen corresponding path program 1 times [2023-02-18 21:00:36,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:36,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73144764] [2023-02-18 21:00:36,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:36,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:36,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 21:00:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:36,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73144764] [2023-02-18 21:00:36,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73144764] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:36,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:36,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:00:36,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063411932] [2023-02-18 21:00:36,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:36,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:00:36,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:36,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:00:36,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:36,682 INFO L87 Difference]: Start difference. First operand 317 states and 448 transitions. Second operand has 4 states, 4 states have (on average 3.75) 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) [2023-02-18 21:00:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:36,695 INFO L93 Difference]: Finished difference Result 515 states and 714 transitions. [2023-02-18 21:00:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:00:36,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 [2023-02-18 21:00:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:36,697 INFO L225 Difference]: With dead ends: 515 [2023-02-18 21:00:36,697 INFO L226 Difference]: Without dead ends: 515 [2023-02-18 21:00:36,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:00:36,698 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 176 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 536 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 [2023-02-18 21:00:36,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 536 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:00:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-02-18 21:00:36,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 321. [2023-02-18 21:00:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 242 states have (on average 1.7933884297520661) internal successors, (434), 310 states have internal predecessors, (434), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 21:00:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2023-02-18 21:00:36,705 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 17 [2023-02-18 21:00:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:36,712 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2023-02-18 21:00:36,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) 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) [2023-02-18 21:00:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2023-02-18 21:00:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 21:00:36,713 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:36,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:36,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-18 21:00:36,714 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:36,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:36,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1022397983, now seen corresponding path program 1 times [2023-02-18 21:00:36,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:36,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146009077] [2023-02-18 21:00:36,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:36,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:36,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 21:00:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:36,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:36,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146009077] [2023-02-18 21:00:36,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146009077] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:36,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:36,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:00:36,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533479475] [2023-02-18 21:00:36,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:36,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 21:00:36,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:36,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 21:00:36,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:00:36,730 INFO L87 Difference]: Start difference. First operand 321 states and 450 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:36,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:36,736 INFO L93 Difference]: Finished difference Result 325 states and 454 transitions. [2023-02-18 21:00:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 21:00:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-18 21:00:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:36,738 INFO L225 Difference]: With dead ends: 325 [2023-02-18 21:00:36,738 INFO L226 Difference]: Without dead ends: 325 [2023-02-18 21:00:36,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:00:36,739 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 0 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 373 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 [2023-02-18 21:00:36,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 373 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:00:36,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-02-18 21:00:36,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2023-02-18 21:00:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 246 states have (on average 1.7804878048780488) internal successors, (438), 314 states have internal predecessors, (438), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 21:00:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 454 transitions. [2023-02-18 21:00:36,745 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 454 transitions. Word has length 17 [2023-02-18 21:00:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:36,745 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 454 transitions. [2023-02-18 21:00:36,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 454 transitions. [2023-02-18 21:00:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 21:00:36,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:36,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:36,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 21:00:36,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:36,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash -213051357, now seen corresponding path program 1 times [2023-02-18 21:00:36,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:36,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244395837] [2023-02-18 21:00:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:36,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:36,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 21:00:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:36,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:36,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244395837] [2023-02-18 21:00:36,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244395837] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:36,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:36,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:00:36,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250227945] [2023-02-18 21:00:36,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:36,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:00:36,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:36,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:00:36,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:36,783 INFO L87 Difference]: Start difference. First operand 325 states and 454 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) [2023-02-18 21:00:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:36,983 INFO L93 Difference]: Finished difference Result 550 states and 690 transitions. [2023-02-18 21:00:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:00:36,983 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 [2023-02-18 21:00:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:36,985 INFO L225 Difference]: With dead ends: 550 [2023-02-18 21:00:36,985 INFO L226 Difference]: Without dead ends: 550 [2023-02-18 21:00:36,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:00:36,986 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 328 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:36,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 440 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:00:36,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-02-18 21:00:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 331. [2023-02-18 21:00:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 252 states have (on average 1.7619047619047619) internal successors, (444), 320 states have internal predecessors, (444), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 21:00:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 460 transitions. [2023-02-18 21:00:36,993 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 460 transitions. Word has length 17 [2023-02-18 21:00:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:36,993 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 460 transitions. [2023-02-18 21:00:36,993 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) [2023-02-18 21:00:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 460 transitions. [2023-02-18 21:00:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 21:00:36,994 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:36,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:36,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 21:00:36,994 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:36,995 INFO L85 PathProgramCache]: Analyzing trace with hash -213051356, now seen corresponding path program 1 times [2023-02-18 21:00:36,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:36,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323534729] [2023-02-18 21:00:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:36,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:37,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 21:00:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:37,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:37,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323534729] [2023-02-18 21:00:37,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323534729] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:37,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:37,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:00:37,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740939225] [2023-02-18 21:00:37,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:37,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:00:37,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:37,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:00:37,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:37,058 INFO L87 Difference]: Start difference. First operand 331 states and 460 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) [2023-02-18 21:00:37,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:37,198 INFO L93 Difference]: Finished difference Result 378 states and 479 transitions. [2023-02-18 21:00:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:00:37,199 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 [2023-02-18 21:00:37,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:37,200 INFO L225 Difference]: With dead ends: 378 [2023-02-18 21:00:37,200 INFO L226 Difference]: Without dead ends: 378 [2023-02-18 21:00:37,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:00:37,201 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 172 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:37,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 431 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-02-18 21:00:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 331. [2023-02-18 21:00:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 252 states have (on average 1.7380952380952381) internal successors, (438), 320 states have internal predecessors, (438), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 21:00:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 454 transitions. [2023-02-18 21:00:37,206 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 454 transitions. Word has length 17 [2023-02-18 21:00:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:37,207 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 454 transitions. [2023-02-18 21:00:37,207 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) [2023-02-18 21:00:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 454 transitions. [2023-02-18 21:00:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 21:00:37,207 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:37,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:37,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 21:00:37,208 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash 490210144, now seen corresponding path program 1 times [2023-02-18 21:00:37,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:37,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34505537] [2023-02-18 21:00:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:37,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:37,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:37,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:37,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34505537] [2023-02-18 21:00:37,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34505537] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:37,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:37,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:00:37,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559230171] [2023-02-18 21:00:37,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:37,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 21:00:37,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:37,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 21:00:37,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:00:37,266 INFO L87 Difference]: Start difference. First operand 331 states and 454 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:37,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:37,517 INFO L93 Difference]: Finished difference Result 680 states and 803 transitions. [2023-02-18 21:00:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 21:00:37,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-02-18 21:00:37,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:37,520 INFO L225 Difference]: With dead ends: 680 [2023-02-18 21:00:37,520 INFO L226 Difference]: Without dead ends: 680 [2023-02-18 21:00:37,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-18 21:00:37,521 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 805 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:37,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 562 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:00:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2023-02-18 21:00:37,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 328. [2023-02-18 21:00:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 253 states have (on average 1.7075098814229248) internal successors, (432), 317 states have internal predecessors, (432), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 21:00:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 448 transitions. [2023-02-18 21:00:37,528 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 448 transitions. Word has length 18 [2023-02-18 21:00:37,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:37,529 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 448 transitions. [2023-02-18 21:00:37,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:37,529 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 448 transitions. [2023-02-18 21:00:37,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 21:00:37,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:37,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:37,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-18 21:00:37,530 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:37,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:37,530 INFO L85 PathProgramCache]: Analyzing trace with hash 490210145, now seen corresponding path program 1 times [2023-02-18 21:00:37,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:37,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476973789] [2023-02-18 21:00:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:37,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:37,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:37,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:37,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476973789] [2023-02-18 21:00:37,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476973789] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:37,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:37,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:00:37,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503282908] [2023-02-18 21:00:37,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:37,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:00:37,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:37,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:00:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:00:37,620 INFO L87 Difference]: Start difference. First operand 328 states and 448 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:38,089 INFO L93 Difference]: Finished difference Result 907 states and 1081 transitions. [2023-02-18 21:00:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 21:00:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-02-18 21:00:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:38,092 INFO L225 Difference]: With dead ends: 907 [2023-02-18 21:00:38,092 INFO L226 Difference]: Without dead ends: 907 [2023-02-18 21:00:38,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:00:38,093 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 1101 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:38,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1105 Valid, 603 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 21:00:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2023-02-18 21:00:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 350. [2023-02-18 21:00:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 275 states have (on average 1.709090909090909) internal successors, (470), 339 states have internal predecessors, (470), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 21:00:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 486 transitions. [2023-02-18 21:00:38,101 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 486 transitions. Word has length 18 [2023-02-18 21:00:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:38,101 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 486 transitions. [2023-02-18 21:00:38,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 486 transitions. [2023-02-18 21:00:38,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 21:00:38,101 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:38,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:38,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-18 21:00:38,102 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:38,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1983299101, now seen corresponding path program 1 times [2023-02-18 21:00:38,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:38,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288162991] [2023-02-18 21:00:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:38,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:38,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:38,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:38,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288162991] [2023-02-18 21:00:38,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288162991] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:38,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:38,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 21:00:38,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37649533] [2023-02-18 21:00:38,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:38,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:00:38,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:38,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:00:38,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:00:38,152 INFO L87 Difference]: Start difference. First operand 350 states and 486 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:38,230 INFO L93 Difference]: Finished difference Result 383 states and 489 transitions. [2023-02-18 21:00:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 21:00:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 19 [2023-02-18 21:00:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:38,232 INFO L225 Difference]: With dead ends: 383 [2023-02-18 21:00:38,232 INFO L226 Difference]: Without dead ends: 383 [2023-02-18 21:00:38,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:00:38,233 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 246 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:38,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 964 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-18 21:00:38,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 350. [2023-02-18 21:00:38,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 275 states have (on average 1.701818181818182) internal successors, (468), 339 states have internal predecessors, (468), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 21:00:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 484 transitions. [2023-02-18 21:00:38,238 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 484 transitions. Word has length 19 [2023-02-18 21:00:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:38,238 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 484 transitions. [2023-02-18 21:00:38,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 484 transitions. [2023-02-18 21:00:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 21:00:38,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:38,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:38,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-18 21:00:38,239 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:38,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:38,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1983297179, now seen corresponding path program 1 times [2023-02-18 21:00:38,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:38,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95478177] [2023-02-18 21:00:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:38,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:38,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:38,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:38,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95478177] [2023-02-18 21:00:38,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95478177] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:38,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:38,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:00:38,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325664202] [2023-02-18 21:00:38,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:38,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:00:38,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:38,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:00:38,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:00:38,326 INFO L87 Difference]: Start difference. First operand 350 states and 484 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:38,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:38,777 INFO L93 Difference]: Finished difference Result 684 states and 840 transitions. [2023-02-18 21:00:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 21:00:38,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 19 [2023-02-18 21:00:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:38,779 INFO L225 Difference]: With dead ends: 684 [2023-02-18 21:00:38,779 INFO L226 Difference]: Without dead ends: 684 [2023-02-18 21:00:38,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:00:38,780 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 492 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:38,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 656 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 21:00:38,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2023-02-18 21:00:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 348. [2023-02-18 21:00:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 273 states have (on average 1.7032967032967032) internal successors, (465), 337 states have internal predecessors, (465), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 21:00:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 481 transitions. [2023-02-18 21:00:38,787 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 481 transitions. Word has length 19 [2023-02-18 21:00:38,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:38,788 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 481 transitions. [2023-02-18 21:00:38,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 481 transitions. [2023-02-18 21:00:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 21:00:38,788 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:38,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:38,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-18 21:00:38,789 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:38,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash -254199642, now seen corresponding path program 1 times [2023-02-18 21:00:38,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:38,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720903782] [2023-02-18 21:00:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:38,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:38,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:38,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:38,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720903782] [2023-02-18 21:00:38,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720903782] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:38,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:38,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 21:00:38,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124127492] [2023-02-18 21:00:38,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:38,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:00:38,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:38,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:00:38,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:00:38,933 INFO L87 Difference]: Start difference. First operand 348 states and 481 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:39,179 INFO L93 Difference]: Finished difference Result 528 states and 698 transitions. [2023-02-18 21:00:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 21:00:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-02-18 21:00:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:39,181 INFO L225 Difference]: With dead ends: 528 [2023-02-18 21:00:39,181 INFO L226 Difference]: Without dead ends: 528 [2023-02-18 21:00:39,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-02-18 21:00:39,182 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 174 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:39,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1036 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:00:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-02-18 21:00:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 407. [2023-02-18 21:00:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 329 states have (on average 1.668693009118541) internal successors, (549), 392 states have internal predecessors, (549), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 21:00:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 569 transitions. [2023-02-18 21:00:39,192 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 569 transitions. Word has length 22 [2023-02-18 21:00:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:39,193 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 569 transitions. [2023-02-18 21:00:39,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 569 transitions. [2023-02-18 21:00:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 21:00:39,194 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:39,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:39,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-18 21:00:39,195 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:39,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1832886663, now seen corresponding path program 1 times [2023-02-18 21:00:39,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:39,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869255763] [2023-02-18 21:00:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:39,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:39,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 21:00:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:39,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:39,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869255763] [2023-02-18 21:00:39,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869255763] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:39,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:39,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 21:00:39,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119038999] [2023-02-18 21:00:39,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:39,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:00:39,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:39,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:00:39,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:00:39,426 INFO L87 Difference]: Start difference. First operand 407 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:39,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:39,828 INFO L93 Difference]: Finished difference Result 752 states and 1020 transitions. [2023-02-18 21:00:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 21:00:39,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-18 21:00:39,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:39,840 INFO L225 Difference]: With dead ends: 752 [2023-02-18 21:00:39,840 INFO L226 Difference]: Without dead ends: 752 [2023-02-18 21:00:39,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-18 21:00:39,841 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 525 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:39,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1498 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 21:00:39,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2023-02-18 21:00:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 401. [2023-02-18 21:00:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 323 states have (on average 1.6656346749226005) internal successors, (538), 386 states have internal predecessors, (538), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 21:00:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 558 transitions. [2023-02-18 21:00:39,849 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 558 transitions. Word has length 23 [2023-02-18 21:00:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:39,850 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 558 transitions. [2023-02-18 21:00:39,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:39,850 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 558 transitions. [2023-02-18 21:00:39,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 21:00:39,850 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:39,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:39,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-18 21:00:39,851 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:39,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2020614998, now seen corresponding path program 1 times [2023-02-18 21:00:39,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:39,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367298734] [2023-02-18 21:00:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:39,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:39,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:39,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:39,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367298734] [2023-02-18 21:00:39,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367298734] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:39,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:39,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 21:00:39,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489964562] [2023-02-18 21:00:39,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:39,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:00:39,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:39,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:00:39,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:00:39,913 INFO L87 Difference]: Start difference. First operand 401 states and 558 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:39,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:39,968 INFO L93 Difference]: Finished difference Result 430 states and 555 transitions. [2023-02-18 21:00:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 21:00:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-18 21:00:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:39,970 INFO L225 Difference]: With dead ends: 430 [2023-02-18 21:00:39,970 INFO L226 Difference]: Without dead ends: 430 [2023-02-18 21:00:39,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:00:39,970 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 243 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:39,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 999 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:00:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-02-18 21:00:39,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 399. [2023-02-18 21:00:39,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 321 states have (on average 1.6573208722741433) internal successors, (532), 384 states have internal predecessors, (532), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 21:00:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 552 transitions. [2023-02-18 21:00:39,977 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 552 transitions. Word has length 23 [2023-02-18 21:00:39,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:39,977 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 552 transitions. [2023-02-18 21:00:39,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:39,977 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 552 transitions. [2023-02-18 21:00:39,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 21:00:39,977 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:39,978 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] [2023-02-18 21:00:39,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-18 21:00:39,978 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash 535975453, now seen corresponding path program 1 times [2023-02-18 21:00:39,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:39,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568465766] [2023-02-18 21:00:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:39,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:39,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:39,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:39,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568465766] [2023-02-18 21:00:39,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568465766] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:39,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:39,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 21:00:39,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979216860] [2023-02-18 21:00:40,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:40,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 21:00:40,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:40,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 21:00:40,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:00:40,001 INFO L87 Difference]: Start difference. First operand 399 states and 552 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:40,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:40,071 INFO L93 Difference]: Finished difference Result 487 states and 646 transitions. [2023-02-18 21:00:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 21:00:40,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 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 24 [2023-02-18 21:00:40,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:40,073 INFO L225 Difference]: With dead ends: 487 [2023-02-18 21:00:40,073 INFO L226 Difference]: Without dead ends: 487 [2023-02-18 21:00:40,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:00:40,073 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 150 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:40,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 273 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:40,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-02-18 21:00:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 396. [2023-02-18 21:00:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 321 states have (on average 1.6292834890965733) internal successors, (523), 381 states have internal predecessors, (523), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 21:00:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 543 transitions. [2023-02-18 21:00:40,080 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 543 transitions. Word has length 24 [2023-02-18 21:00:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:40,080 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 543 transitions. [2023-02-18 21:00:40,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:40,080 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 543 transitions. [2023-02-18 21:00:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 21:00:40,080 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:40,081 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] [2023-02-18 21:00:40,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-18 21:00:40,081 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:40,081 INFO L85 PathProgramCache]: Analyzing trace with hash 535975454, now seen corresponding path program 1 times [2023-02-18 21:00:40,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:40,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795005034] [2023-02-18 21:00:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:40,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:40,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:40,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:40,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795005034] [2023-02-18 21:00:40,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795005034] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:40,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:40,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:00:40,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755163982] [2023-02-18 21:00:40,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:40,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:00:40,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:40,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:00:40,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:40,120 INFO L87 Difference]: Start difference. First operand 396 states and 543 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:40,204 INFO L93 Difference]: Finished difference Result 425 states and 540 transitions. [2023-02-18 21:00:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:00:40,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 24 [2023-02-18 21:00:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:40,206 INFO L225 Difference]: With dead ends: 425 [2023-02-18 21:00:40,206 INFO L226 Difference]: Without dead ends: 425 [2023-02-18 21:00:40,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:40,206 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 318 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:40,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 277 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-02-18 21:00:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 394. [2023-02-18 21:00:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 321 states have (on average 1.6105919003115265) internal successors, (517), 379 states have internal predecessors, (517), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 21:00:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 537 transitions. [2023-02-18 21:00:40,212 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 537 transitions. Word has length 24 [2023-02-18 21:00:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:40,213 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 537 transitions. [2023-02-18 21:00:40,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 537 transitions. [2023-02-18 21:00:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 21:00:40,213 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:40,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:40,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-18 21:00:40,214 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:40,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:40,214 INFO L85 PathProgramCache]: Analyzing trace with hash 475133714, now seen corresponding path program 1 times [2023-02-18 21:00:40,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:40,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029373544] [2023-02-18 21:00:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:40,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:40,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 21:00:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:40,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:40,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029373544] [2023-02-18 21:00:40,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029373544] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:40,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:40,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:00:40,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839852627] [2023-02-18 21:00:40,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:40,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:00:40,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:40,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:00:40,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:40,246 INFO L87 Difference]: Start difference. First operand 394 states and 537 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:40,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:40,397 INFO L93 Difference]: Finished difference Result 619 states and 786 transitions. [2023-02-18 21:00:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:00:40,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-18 21:00:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:40,399 INFO L225 Difference]: With dead ends: 619 [2023-02-18 21:00:40,400 INFO L226 Difference]: Without dead ends: 619 [2023-02-18 21:00:40,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:00:40,400 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 286 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:40,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 428 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2023-02-18 21:00:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 414. [2023-02-18 21:00:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 341 states have (on average 1.6334310850439884) internal successors, (557), 399 states have internal predecessors, (557), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 21:00:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 577 transitions. [2023-02-18 21:00:40,407 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 577 transitions. Word has length 25 [2023-02-18 21:00:40,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:40,407 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 577 transitions. [2023-02-18 21:00:40,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 577 transitions. [2023-02-18 21:00:40,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 21:00:40,408 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:40,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:40,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-18 21:00:40,409 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:40,409 INFO L85 PathProgramCache]: Analyzing trace with hash 475133715, now seen corresponding path program 1 times [2023-02-18 21:00:40,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:40,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831319353] [2023-02-18 21:00:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:40,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:40,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 21:00:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:40,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:40,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831319353] [2023-02-18 21:00:40,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831319353] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:40,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:40,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:00:40,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751769497] [2023-02-18 21:00:40,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:40,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:00:40,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:00:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:40,462 INFO L87 Difference]: Start difference. First operand 414 states and 577 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:40,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:40,579 INFO L93 Difference]: Finished difference Result 457 states and 592 transitions. [2023-02-18 21:00:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:00:40,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-18 21:00:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:40,581 INFO L225 Difference]: With dead ends: 457 [2023-02-18 21:00:40,582 INFO L226 Difference]: Without dead ends: 457 [2023-02-18 21:00:40,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:00:40,582 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 158 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:40,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 405 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-02-18 21:00:40,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 414. [2023-02-18 21:00:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 341 states have (on average 1.6070381231671553) internal successors, (548), 399 states have internal predecessors, (548), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 21:00:40,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 568 transitions. [2023-02-18 21:00:40,589 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 568 transitions. Word has length 25 [2023-02-18 21:00:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:40,589 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 568 transitions. [2023-02-18 21:00:40,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:40,589 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 568 transitions. [2023-02-18 21:00:40,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 21:00:40,589 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:40,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:40,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-18 21:00:40,590 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:40,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:40,590 INFO L85 PathProgramCache]: Analyzing trace with hash -323662464, now seen corresponding path program 1 times [2023-02-18 21:00:40,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:40,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053118181] [2023-02-18 21:00:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:40,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:40,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:40,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:40,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053118181] [2023-02-18 21:00:40,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053118181] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:40,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:40,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:00:40,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651636730] [2023-02-18 21:00:40,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:40,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:00:40,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:40,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:00:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:40,658 INFO L87 Difference]: Start difference. First operand 414 states and 568 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:40,753 INFO L93 Difference]: Finished difference Result 441 states and 568 transitions. [2023-02-18 21:00:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:00:40,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-18 21:00:40,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:40,754 INFO L225 Difference]: With dead ends: 441 [2023-02-18 21:00:40,754 INFO L226 Difference]: Without dead ends: 441 [2023-02-18 21:00:40,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:40,755 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 156 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:40,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 349 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-02-18 21:00:40,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 413. [2023-02-18 21:00:40,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 341 states have (on average 1.598240469208211) internal successors, (545), 398 states have internal predecessors, (545), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 21:00:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 565 transitions. [2023-02-18 21:00:40,762 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 565 transitions. Word has length 26 [2023-02-18 21:00:40,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:40,762 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 565 transitions. [2023-02-18 21:00:40,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:40,762 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 565 transitions. [2023-02-18 21:00:40,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 21:00:40,762 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:40,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:40,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-18 21:00:40,763 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:40,763 INFO L85 PathProgramCache]: Analyzing trace with hash -323662657, now seen corresponding path program 1 times [2023-02-18 21:00:40,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:40,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281151400] [2023-02-18 21:00:40,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:40,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:40,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:40,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:40,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281151400] [2023-02-18 21:00:40,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281151400] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:40,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:40,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 21:00:40,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829475771] [2023-02-18 21:00:40,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:40,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 21:00:40,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:40,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 21:00:40,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-18 21:00:40,833 INFO L87 Difference]: Start difference. First operand 413 states and 565 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:40,945 INFO L93 Difference]: Finished difference Result 625 states and 836 transitions. [2023-02-18 21:00:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 21:00:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-18 21:00:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:40,949 INFO L225 Difference]: With dead ends: 625 [2023-02-18 21:00:40,949 INFO L226 Difference]: Without dead ends: 625 [2023-02-18 21:00:40,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-18 21:00:40,950 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 161 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:40,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1044 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-02-18 21:00:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 443. [2023-02-18 21:00:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 371 states have (on average 1.5633423180592991) internal successors, (580), 428 states have internal predecessors, (580), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 21:00:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 600 transitions. [2023-02-18 21:00:40,959 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 600 transitions. Word has length 26 [2023-02-18 21:00:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:40,959 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 600 transitions. [2023-02-18 21:00:40,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 600 transitions. [2023-02-18 21:00:40,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 21:00:40,959 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:40,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:40,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-18 21:00:40,960 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:40,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1503548246, now seen corresponding path program 1 times [2023-02-18 21:00:40,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:40,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377647864] [2023-02-18 21:00:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:40,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:41,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 21:00:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:41,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:41,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377647864] [2023-02-18 21:00:41,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377647864] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:41,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:41,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:00:41,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469218353] [2023-02-18 21:00:41,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:41,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:00:41,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:41,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:00:41,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:00:41,057 INFO L87 Difference]: Start difference. First operand 443 states and 600 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:41,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:41,268 INFO L93 Difference]: Finished difference Result 484 states and 620 transitions. [2023-02-18 21:00:41,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 21:00:41,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-02-18 21:00:41,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:41,270 INFO L225 Difference]: With dead ends: 484 [2023-02-18 21:00:41,270 INFO L226 Difference]: Without dead ends: 484 [2023-02-18 21:00:41,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:00:41,270 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 206 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:41,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 605 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:00:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-02-18 21:00:41,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 443. [2023-02-18 21:00:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 371 states have (on average 1.5525606469002695) internal successors, (576), 428 states have internal predecessors, (576), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 21:00:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 596 transitions. [2023-02-18 21:00:41,276 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 596 transitions. Word has length 28 [2023-02-18 21:00:41,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:41,276 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 596 transitions. [2023-02-18 21:00:41,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:41,276 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 596 transitions. [2023-02-18 21:00:41,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 21:00:41,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:41,277 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] [2023-02-18 21:00:41,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-18 21:00:41,277 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:41,277 INFO L85 PathProgramCache]: Analyzing trace with hash 634621977, now seen corresponding path program 1 times [2023-02-18 21:00:41,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:41,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256973954] [2023-02-18 21:00:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:41,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:41,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 21:00:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:41,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:41,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256973954] [2023-02-18 21:00:41,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256973954] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:41,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:41,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 21:00:41,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228937794] [2023-02-18 21:00:41,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:41,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:00:41,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:41,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:00:41,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:00:41,359 INFO L87 Difference]: Start difference. First operand 443 states and 596 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 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) [2023-02-18 21:00:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:41,598 INFO L93 Difference]: Finished difference Result 548 states and 702 transitions. [2023-02-18 21:00:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 21:00:41,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 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 [2023-02-18 21:00:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:41,600 INFO L225 Difference]: With dead ends: 548 [2023-02-18 21:00:41,600 INFO L226 Difference]: Without dead ends: 548 [2023-02-18 21:00:41,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-02-18 21:00:41,601 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 238 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:41,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1087 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:00:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-02-18 21:00:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 443. [2023-02-18 21:00:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 371 states have (on average 1.5498652291105122) internal successors, (575), 428 states have internal predecessors, (575), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 21:00:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 595 transitions. [2023-02-18 21:00:41,607 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 595 transitions. Word has length 29 [2023-02-18 21:00:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:41,607 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 595 transitions. [2023-02-18 21:00:41,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 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) [2023-02-18 21:00:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 595 transitions. [2023-02-18 21:00:41,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 21:00:41,608 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:41,608 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] [2023-02-18 21:00:41,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-18 21:00:41,608 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:41,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1800846934, now seen corresponding path program 1 times [2023-02-18 21:00:41,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:41,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977897090] [2023-02-18 21:00:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:41,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:41,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 21:00:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:41,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:41,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977897090] [2023-02-18 21:00:41,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977897090] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:41,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:41,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 21:00:41,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426435420] [2023-02-18 21:00:41,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:41,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:00:41,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:41,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:00:41,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:00:41,858 INFO L87 Difference]: Start difference. First operand 443 states and 595 transitions. Second operand has 8 states, 8 states have (on average 3.5) 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) [2023-02-18 21:00:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:42,034 INFO L93 Difference]: Finished difference Result 493 states and 621 transitions. [2023-02-18 21:00:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 21:00:42,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) 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 [2023-02-18 21:00:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:42,035 INFO L225 Difference]: With dead ends: 493 [2023-02-18 21:00:42,036 INFO L226 Difference]: Without dead ends: 493 [2023-02-18 21:00:42,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-18 21:00:42,038 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 329 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:42,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 1482 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-02-18 21:00:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 331. [2023-02-18 21:00:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 265 states have (on average 1.5547169811320756) internal successors, (412), 321 states have internal predecessors, (412), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 21:00:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 424 transitions. [2023-02-18 21:00:42,048 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 424 transitions. Word has length 30 [2023-02-18 21:00:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:42,048 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 424 transitions. [2023-02-18 21:00:42,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) 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) [2023-02-18 21:00:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 424 transitions. [2023-02-18 21:00:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 21:00:42,048 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:42,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:42,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-18 21:00:42,049 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2076048724, now seen corresponding path program 1 times [2023-02-18 21:00:42,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:42,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465479419] [2023-02-18 21:00:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:42,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:42,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:42,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:42,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465479419] [2023-02-18 21:00:42,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465479419] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:42,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:42,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:00:42,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200273039] [2023-02-18 21:00:42,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:42,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:00:42,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:42,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:00:42,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:00:42,091 INFO L87 Difference]: Start difference. First operand 331 states and 424 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:42,227 INFO L93 Difference]: Finished difference Result 421 states and 525 transitions. [2023-02-18 21:00:42,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 21:00:42,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 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 34 [2023-02-18 21:00:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:42,229 INFO L225 Difference]: With dead ends: 421 [2023-02-18 21:00:42,229 INFO L226 Difference]: Without dead ends: 421 [2023-02-18 21:00:42,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:00:42,230 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 489 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:42,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 537 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-02-18 21:00:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 330. [2023-02-18 21:00:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 265 states have (on average 1.5471698113207548) internal successors, (410), 320 states have internal predecessors, (410), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 21:00:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 422 transitions. [2023-02-18 21:00:42,235 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 422 transitions. Word has length 34 [2023-02-18 21:00:42,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:42,235 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 422 transitions. [2023-02-18 21:00:42,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:42,235 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 422 transitions. [2023-02-18 21:00:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 21:00:42,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:42,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:42,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-18 21:00:42,236 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:42,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2076048723, now seen corresponding path program 1 times [2023-02-18 21:00:42,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:42,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739465843] [2023-02-18 21:00:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:42,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:42,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:42,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:42,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739465843] [2023-02-18 21:00:42,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739465843] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:42,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:42,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:00:42,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578604363] [2023-02-18 21:00:42,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:42,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:00:42,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:42,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:00:42,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:00:42,311 INFO L87 Difference]: Start difference. First operand 330 states and 422 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:42,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:42,407 INFO L93 Difference]: Finished difference Result 329 states and 420 transitions. [2023-02-18 21:00:42,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 21:00:42,407 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 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 34 [2023-02-18 21:00:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:42,408 INFO L225 Difference]: With dead ends: 329 [2023-02-18 21:00:42,408 INFO L226 Difference]: Without dead ends: 329 [2023-02-18 21:00:42,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:00:42,409 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 519 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:42,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 330 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:42,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-18 21:00:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2023-02-18 21:00:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 265 states have (on average 1.539622641509434) internal successors, (408), 319 states have internal predecessors, (408), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 21:00:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 420 transitions. [2023-02-18 21:00:42,413 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 420 transitions. Word has length 34 [2023-02-18 21:00:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:42,414 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 420 transitions. [2023-02-18 21:00:42,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:42,414 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 420 transitions. [2023-02-18 21:00:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 21:00:42,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:42,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:42,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-18 21:00:42,414 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:42,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:42,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972557, now seen corresponding path program 1 times [2023-02-18 21:00:42,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:42,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122810971] [2023-02-18 21:00:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:42,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:42,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:42,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:42,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122810971] [2023-02-18 21:00:42,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122810971] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:42,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:42,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:00:42,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872723840] [2023-02-18 21:00:42,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:42,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 21:00:42,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:42,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 21:00:42,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:00:42,457 INFO L87 Difference]: Start difference. First operand 329 states and 420 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:42,609 INFO L93 Difference]: Finished difference Result 716 states and 882 transitions. [2023-02-18 21:00:42,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 21:00:42,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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 36 [2023-02-18 21:00:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:42,612 INFO L225 Difference]: With dead ends: 716 [2023-02-18 21:00:42,612 INFO L226 Difference]: Without dead ends: 716 [2023-02-18 21:00:42,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:00:42,612 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 577 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:42,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 489 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:42,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-02-18 21:00:42,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 326. [2023-02-18 21:00:42,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 265 states have (on average 1.5169811320754718) internal successors, (402), 316 states have internal predecessors, (402), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 21:00:42,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 414 transitions. [2023-02-18 21:00:42,618 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 414 transitions. Word has length 36 [2023-02-18 21:00:42,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:42,618 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 414 transitions. [2023-02-18 21:00:42,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:42,618 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 414 transitions. [2023-02-18 21:00:42,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 21:00:42,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:42,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:42,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-18 21:00:42,619 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:42,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972558, now seen corresponding path program 1 times [2023-02-18 21:00:42,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:42,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891704916] [2023-02-18 21:00:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:42,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:42,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:42,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:42,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891704916] [2023-02-18 21:00:42,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891704916] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:42,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:42,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:00:42,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118134113] [2023-02-18 21:00:42,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:42,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:00:42,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:00:42,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:00:42,701 INFO L87 Difference]: Start difference. First operand 326 states and 414 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:42,864 INFO L93 Difference]: Finished difference Result 532 states and 672 transitions. [2023-02-18 21:00:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 21:00:42,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 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 36 [2023-02-18 21:00:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:42,865 INFO L225 Difference]: With dead ends: 532 [2023-02-18 21:00:42,865 INFO L226 Difference]: Without dead ends: 532 [2023-02-18 21:00:42,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:00:42,866 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 598 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:42,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 448 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-02-18 21:00:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 325. [2023-02-18 21:00:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 265 states have (on average 1.509433962264151) internal successors, (400), 315 states have internal predecessors, (400), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 21:00:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 412 transitions. [2023-02-18 21:00:42,871 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 412 transitions. Word has length 36 [2023-02-18 21:00:42,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:42,871 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 412 transitions. [2023-02-18 21:00:42,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 412 transitions. [2023-02-18 21:00:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 21:00:42,871 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:42,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:42,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-18 21:00:42,871 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:42,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:42,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972719, now seen corresponding path program 1 times [2023-02-18 21:00:42,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:42,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211772319] [2023-02-18 21:00:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:42,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:42,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:42,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:42,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211772319] [2023-02-18 21:00:42,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211772319] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:42,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:42,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:00:42,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134586363] [2023-02-18 21:00:42,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:42,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 21:00:42,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:42,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 21:00:42,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:00:42,975 INFO L87 Difference]: Start difference. First operand 325 states and 412 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:43,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:43,196 INFO L93 Difference]: Finished difference Result 475 states and 547 transitions. [2023-02-18 21:00:43,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 21:00:43,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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 36 [2023-02-18 21:00:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:43,198 INFO L225 Difference]: With dead ends: 475 [2023-02-18 21:00:43,198 INFO L226 Difference]: Without dead ends: 475 [2023-02-18 21:00:43,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:00:43,199 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 372 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:43,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 436 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:00:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-02-18 21:00:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 325. [2023-02-18 21:00:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 265 states have (on average 1.5018867924528303) internal successors, (398), 315 states have internal predecessors, (398), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 21:00:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 410 transitions. [2023-02-18 21:00:43,203 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 410 transitions. Word has length 36 [2023-02-18 21:00:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:43,203 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 410 transitions. [2023-02-18 21:00:43,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 410 transitions. [2023-02-18 21:00:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 21:00:43,204 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:43,204 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, 1, 1, 1, 1, 1] [2023-02-18 21:00:43,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-18 21:00:43,204 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:43,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:43,204 INFO L85 PathProgramCache]: Analyzing trace with hash -274270044, now seen corresponding path program 1 times [2023-02-18 21:00:43,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:43,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390154610] [2023-02-18 21:00:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:43,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:43,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:43,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-18 21:00:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:00:43,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:43,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390154610] [2023-02-18 21:00:43,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390154610] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:00:43,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904696825] [2023-02-18 21:00:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:43,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:00:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:00:43,250 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 21:00:43,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 21:00:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:43,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 21:00:43,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:00:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:43,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:00:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:00:43,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904696825] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:00:43,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:00:43,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-18 21:00:43,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727672488] [2023-02-18 21:00:43,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:00:43,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:00:43,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:00:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:00:43,452 INFO L87 Difference]: Start difference. First operand 325 states and 410 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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) [2023-02-18 21:00:43,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:43,505 INFO L93 Difference]: Finished difference Result 1305 states and 1682 transitions. [2023-02-18 21:00:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 21:00:43,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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 50 [2023-02-18 21:00:43,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:43,508 INFO L225 Difference]: With dead ends: 1305 [2023-02-18 21:00:43,508 INFO L226 Difference]: Without dead ends: 1305 [2023-02-18 21:00:43,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-02-18 21:00:43,510 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 936 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:43,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 1051 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:00:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2023-02-18 21:00:43,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 724. [2023-02-18 21:00:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 658 states have (on average 1.4620060790273557) internal successors, (962), 708 states have internal predecessors, (962), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 21:00:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 986 transitions. [2023-02-18 21:00:43,521 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 986 transitions. Word has length 50 [2023-02-18 21:00:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:43,521 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 986 transitions. [2023-02-18 21:00:43,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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) [2023-02-18 21:00:43,521 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 986 transitions. [2023-02-18 21:00:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 21:00:43,522 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:43,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:43,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 21:00:43,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-18 21:00:43,727 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:43,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:43,728 INFO L85 PathProgramCache]: Analyzing trace with hash -975334622, now seen corresponding path program 1 times [2023-02-18 21:00:43,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:43,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685602478] [2023-02-18 21:00:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:43,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:43,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:43,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-18 21:00:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:00:43,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:43,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685602478] [2023-02-18 21:00:43,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685602478] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:43,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:43,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:00:43,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413060559] [2023-02-18 21:00:43,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:43,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:00:43,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:43,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:00:43,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:00:43,894 INFO L87 Difference]: Start difference. First operand 724 states and 986 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:00:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:44,089 INFO L93 Difference]: Finished difference Result 1113 states and 1503 transitions. [2023-02-18 21:00:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 21:00:44,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-02-18 21:00:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:44,092 INFO L225 Difference]: With dead ends: 1113 [2023-02-18 21:00:44,092 INFO L226 Difference]: Without dead ends: 1113 [2023-02-18 21:00:44,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:00:44,093 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 448 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:44,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 324 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:00:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2023-02-18 21:00:44,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 719. [2023-02-18 21:00:44,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 658 states have (on average 1.4407294832826747) internal successors, (948), 703 states have internal predecessors, (948), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 21:00:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 972 transitions. [2023-02-18 21:00:44,103 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 972 transitions. Word has length 50 [2023-02-18 21:00:44,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:44,103 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 972 transitions. [2023-02-18 21:00:44,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:00:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 972 transitions. [2023-02-18 21:00:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 21:00:44,104 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:44,104 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, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:44,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-18 21:00:44,104 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:44,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1212801990, now seen corresponding path program 1 times [2023-02-18 21:00:44,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:44,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379058487] [2023-02-18 21:00:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:44,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:44,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:00:44,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:44,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379058487] [2023-02-18 21:00:44,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379058487] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:44,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:44,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:00:44,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792721840] [2023-02-18 21:00:44,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:44,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:00:44,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:44,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:00:44,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:00:44,148 INFO L87 Difference]: Start difference. First operand 719 states and 972 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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) [2023-02-18 21:00:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:44,159 INFO L93 Difference]: Finished difference Result 826 states and 1102 transitions. [2023-02-18 21:00:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:00:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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 51 [2023-02-18 21:00:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:44,162 INFO L225 Difference]: With dead ends: 826 [2023-02-18 21:00:44,162 INFO L226 Difference]: Without dead ends: 826 [2023-02-18 21:00:44,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:00:44,163 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 120 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 404 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 [2023-02-18 21:00:44,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 404 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:00:44,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2023-02-18 21:00:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 725. [2023-02-18 21:00:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 664 states have (on average 1.4367469879518073) internal successors, (954), 709 states have internal predecessors, (954), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 21:00:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 978 transitions. [2023-02-18 21:00:44,180 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 978 transitions. Word has length 51 [2023-02-18 21:00:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:44,180 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 978 transitions. [2023-02-18 21:00:44,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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) [2023-02-18 21:00:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 978 transitions. [2023-02-18 21:00:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 21:00:44,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:44,181 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, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:44,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-18 21:00:44,182 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:44,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:44,182 INFO L85 PathProgramCache]: Analyzing trace with hash 532743620, now seen corresponding path program 1 times [2023-02-18 21:00:44,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:44,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354472752] [2023-02-18 21:00:44,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:44,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:44,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:00:44,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:44,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354472752] [2023-02-18 21:00:44,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354472752] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:00:44,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592908490] [2023-02-18 21:00:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:44,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:00:44,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:00:44,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 21:00:44,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 21:00:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:44,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 21:00:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:00:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:00:44,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:00:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:00:44,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592908490] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:00:44,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:00:44,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-02-18 21:00:44,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048360524] [2023-02-18 21:00:44,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:00:44,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 21:00:44,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:44,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 21:00:44,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 21:00:44,357 INFO L87 Difference]: Start difference. First operand 725 states and 978 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 21:00:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:44,386 INFO L93 Difference]: Finished difference Result 2559 states and 3441 transitions. [2023-02-18 21:00:44,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 21:00:44,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2023-02-18 21:00:44,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:44,392 INFO L225 Difference]: With dead ends: 2559 [2023-02-18 21:00:44,393 INFO L226 Difference]: Without dead ends: 2559 [2023-02-18 21:00:44,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-18 21:00:44,394 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 504 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:44,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1155 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:00:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2023-02-18 21:00:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 1754. [2023-02-18 21:00:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1674 states have (on average 1.4301075268817205) internal successors, (2394), 1719 states have internal predecessors, (2394), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-18 21:00:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 2456 transitions. [2023-02-18 21:00:44,438 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 2456 transitions. Word has length 51 [2023-02-18 21:00:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:44,438 INFO L495 AbstractCegarLoop]: Abstraction has 1754 states and 2456 transitions. [2023-02-18 21:00:44,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 21:00:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 2456 transitions. [2023-02-18 21:00:44,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 21:00:44,439 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:44,439 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] [2023-02-18 21:00:44,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 21:00:44,645 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,SelfDestructingSolverStorable35 [2023-02-18 21:00:44,646 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:44,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:44,646 INFO L85 PathProgramCache]: Analyzing trace with hash 530896578, now seen corresponding path program 1 times [2023-02-18 21:00:44,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:44,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072715496] [2023-02-18 21:00:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:44,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:44,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:44,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:44,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072715496] [2023-02-18 21:00:44,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072715496] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:44,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:44,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 21:00:44,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420539365] [2023-02-18 21:00:44,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:44,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 21:00:44,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:44,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 21:00:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-18 21:00:44,856 INFO L87 Difference]: Start difference. First operand 1754 states and 2456 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:45,031 INFO L93 Difference]: Finished difference Result 1772 states and 2474 transitions. [2023-02-18 21:00:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 21:00:45,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-02-18 21:00:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:45,036 INFO L225 Difference]: With dead ends: 1772 [2023-02-18 21:00:45,036 INFO L226 Difference]: Without dead ends: 1772 [2023-02-18 21:00:45,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-18 21:00:45,036 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 392 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:45,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 565 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2023-02-18 21:00:45,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1756. [2023-02-18 21:00:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1676 states have (on average 1.4301909307875895) internal successors, (2397), 1721 states have internal predecessors, (2397), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-18 21:00:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2459 transitions. [2023-02-18 21:00:45,055 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2459 transitions. Word has length 51 [2023-02-18 21:00:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:45,055 INFO L495 AbstractCegarLoop]: Abstraction has 1756 states and 2459 transitions. [2023-02-18 21:00:45,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:45,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2459 transitions. [2023-02-18 21:00:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 21:00:45,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:45,058 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] [2023-02-18 21:00:45,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-18 21:00:45,058 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:45,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:45,058 INFO L85 PathProgramCache]: Analyzing trace with hash 530896640, now seen corresponding path program 1 times [2023-02-18 21:00:45,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:45,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380955279] [2023-02-18 21:00:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:45,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:45,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:45,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:45,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380955279] [2023-02-18 21:00:45,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380955279] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:45,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:45,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:00:45,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942014900] [2023-02-18 21:00:45,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:45,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:00:45,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:00:45,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:00:45,168 INFO L87 Difference]: Start difference. First operand 1756 states and 2459 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:45,278 INFO L93 Difference]: Finished difference Result 1771 states and 2472 transitions. [2023-02-18 21:00:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 21:00:45,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-02-18 21:00:45,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:45,288 INFO L225 Difference]: With dead ends: 1771 [2023-02-18 21:00:45,288 INFO L226 Difference]: Without dead ends: 1771 [2023-02-18 21:00:45,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:00:45,290 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 420 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:45,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 305 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:00:45,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2023-02-18 21:00:45,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1753. [2023-02-18 21:00:45,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1674 states have (on average 1.4289127837514934) internal successors, (2392), 1718 states have internal predecessors, (2392), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-18 21:00:45,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2454 transitions. [2023-02-18 21:00:45,307 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2454 transitions. Word has length 51 [2023-02-18 21:00:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:45,307 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2454 transitions. [2023-02-18 21:00:45,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2454 transitions. [2023-02-18 21:00:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 21:00:45,311 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:45,311 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, 1, 1, 1, 1, 1] [2023-02-18 21:00:45,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-02-18 21:00:45,311 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:45,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:45,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1870600004, now seen corresponding path program 1 times [2023-02-18 21:00:45,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:45,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629205328] [2023-02-18 21:00:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:45,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:45,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:45,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:45,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629205328] [2023-02-18 21:00:45,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629205328] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:45,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:45,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 21:00:45,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975488350] [2023-02-18 21:00:45,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:45,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 21:00:45,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 21:00:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-18 21:00:45,646 INFO L87 Difference]: Start difference. First operand 1753 states and 2454 transitions. Second operand has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:46,370 INFO L93 Difference]: Finished difference Result 3818 states and 5398 transitions. [2023-02-18 21:00:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 21:00:46,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 54 [2023-02-18 21:00:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:46,377 INFO L225 Difference]: With dead ends: 3818 [2023-02-18 21:00:46,377 INFO L226 Difference]: Without dead ends: 3818 [2023-02-18 21:00:46,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2023-02-18 21:00:46,378 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 1148 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:46,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 1346 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 21:00:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3818 states. [2023-02-18 21:00:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3818 to 2333. [2023-02-18 21:00:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2230 states have (on average 1.4278026905829597) internal successors, (3184), 2291 states have internal predecessors, (3184), 54 states have call successors, (54), 5 states have call predecessors, (54), 5 states have return successors, (54), 36 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-18 21:00:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3292 transitions. [2023-02-18 21:00:46,405 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3292 transitions. Word has length 54 [2023-02-18 21:00:46,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:46,405 INFO L495 AbstractCegarLoop]: Abstraction has 2333 states and 3292 transitions. [2023-02-18 21:00:46,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3292 transitions. [2023-02-18 21:00:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 21:00:46,406 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:46,406 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] [2023-02-18 21:00:46,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-02-18 21:00:46,406 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:46,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1870600005, now seen corresponding path program 1 times [2023-02-18 21:00:46,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:46,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455942913] [2023-02-18 21:00:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:46,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:46,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:46,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:46,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455942913] [2023-02-18 21:00:46,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455942913] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:46,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:46,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 21:00:46,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368440877] [2023-02-18 21:00:46,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:46,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 21:00:46,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:46,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 21:00:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-18 21:00:46,763 INFO L87 Difference]: Start difference. First operand 2333 states and 3292 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:47,353 INFO L93 Difference]: Finished difference Result 3840 states and 5449 transitions. [2023-02-18 21:00:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 21:00:47,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 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 54 [2023-02-18 21:00:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:47,363 INFO L225 Difference]: With dead ends: 3840 [2023-02-18 21:00:47,367 INFO L226 Difference]: Without dead ends: 3840 [2023-02-18 21:00:47,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2023-02-18 21:00:47,367 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 977 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:47,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [978 Valid, 1185 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 21:00:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3840 states. [2023-02-18 21:00:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3840 to 2478. [2023-02-18 21:00:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2369 states have (on average 1.4402701561840439) internal successors, (3412), 2432 states have internal predecessors, (3412), 59 states have call successors, (59), 6 states have call predecessors, (59), 6 states have return successors, (59), 39 states have call predecessors, (59), 59 states have call successors, (59) [2023-02-18 21:00:47,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 3530 transitions. [2023-02-18 21:00:47,399 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 3530 transitions. Word has length 54 [2023-02-18 21:00:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:47,399 INFO L495 AbstractCegarLoop]: Abstraction has 2478 states and 3530 transitions. [2023-02-18 21:00:47,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 3530 transitions. [2023-02-18 21:00:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 21:00:47,400 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:47,400 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] [2023-02-18 21:00:47,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-02-18 21:00:47,400 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:47,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:47,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1872447046, now seen corresponding path program 1 times [2023-02-18 21:00:47,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:47,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553065979] [2023-02-18 21:00:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:47,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:47,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:47,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:47,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553065979] [2023-02-18 21:00:47,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553065979] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:47,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:47,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 21:00:47,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116922540] [2023-02-18 21:00:47,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:47,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 21:00:47,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 21:00:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-18 21:00:47,780 INFO L87 Difference]: Start difference. First operand 2478 states and 3530 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:48,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:48,111 INFO L93 Difference]: Finished difference Result 2516 states and 3566 transitions. [2023-02-18 21:00:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 21:00:48,112 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 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 54 [2023-02-18 21:00:48,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:48,116 INFO L225 Difference]: With dead ends: 2516 [2023-02-18 21:00:48,116 INFO L226 Difference]: Without dead ends: 2516 [2023-02-18 21:00:48,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-18 21:00:48,116 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 109 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:48,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 779 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:00:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2023-02-18 21:00:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2505. [2023-02-18 21:00:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2397 states have (on average 1.4347100542344597) internal successors, (3439), 2459 states have internal predecessors, (3439), 58 states have call successors, (58), 6 states have call predecessors, (58), 6 states have return successors, (58), 39 states have call predecessors, (58), 58 states have call successors, (58) [2023-02-18 21:00:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3555 transitions. [2023-02-18 21:00:48,137 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3555 transitions. Word has length 54 [2023-02-18 21:00:48,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:48,138 INFO L495 AbstractCegarLoop]: Abstraction has 2505 states and 3555 transitions. [2023-02-18 21:00:48,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:48,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3555 transitions. [2023-02-18 21:00:48,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 21:00:48,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:48,139 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] [2023-02-18 21:00:48,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-02-18 21:00:48,139 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:48,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:48,140 INFO L85 PathProgramCache]: Analyzing trace with hash 652010731, now seen corresponding path program 1 times [2023-02-18 21:00:48,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:48,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122092124] [2023-02-18 21:00:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:48,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:48,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:48,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:48,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122092124] [2023-02-18 21:00:48,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122092124] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:48,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:48,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 21:00:48,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396727892] [2023-02-18 21:00:48,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:48,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 21:00:48,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:48,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 21:00:48,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-18 21:00:48,458 INFO L87 Difference]: Start difference. First operand 2505 states and 3555 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:49,171 INFO L93 Difference]: Finished difference Result 4246 states and 6027 transitions. [2023-02-18 21:00:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 21:00:49,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 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 55 [2023-02-18 21:00:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:49,178 INFO L225 Difference]: With dead ends: 4246 [2023-02-18 21:00:49,178 INFO L226 Difference]: Without dead ends: 4246 [2023-02-18 21:00:49,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2023-02-18 21:00:49,179 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 1532 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:49,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1534 Valid, 1157 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 21:00:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4246 states. [2023-02-18 21:00:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4246 to 2756. [2023-02-18 21:00:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2623 states have (on average 1.42089210827297) internal successors, (3727), 2703 states have internal predecessors, (3727), 81 states have call successors, (81), 8 states have call predecessors, (81), 8 states have return successors, (81), 44 states have call predecessors, (81), 81 states have call successors, (81) [2023-02-18 21:00:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 3889 transitions. [2023-02-18 21:00:49,235 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 3889 transitions. Word has length 55 [2023-02-18 21:00:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:49,235 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 3889 transitions. [2023-02-18 21:00:49,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:49,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 3889 transitions. [2023-02-18 21:00:49,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 21:00:49,236 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:49,236 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] [2023-02-18 21:00:49,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-02-18 21:00:49,237 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:49,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:49,238 INFO L85 PathProgramCache]: Analyzing trace with hash 652010732, now seen corresponding path program 1 times [2023-02-18 21:00:49,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:49,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956620478] [2023-02-18 21:00:49,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:49,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:49,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:49,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:49,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956620478] [2023-02-18 21:00:49,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956620478] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:49,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:49,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 21:00:49,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464761434] [2023-02-18 21:00:49,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:49,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 21:00:49,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:49,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 21:00:49,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-18 21:00:49,680 INFO L87 Difference]: Start difference. First operand 2756 states and 3889 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:50,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:50,268 INFO L93 Difference]: Finished difference Result 4243 states and 6026 transitions. [2023-02-18 21:00:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 21:00:50,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 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 55 [2023-02-18 21:00:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:50,274 INFO L225 Difference]: With dead ends: 4243 [2023-02-18 21:00:50,274 INFO L226 Difference]: Without dead ends: 4243 [2023-02-18 21:00:50,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2023-02-18 21:00:50,281 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 1427 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:50,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1427 Valid, 955 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 21:00:50,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2023-02-18 21:00:50,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 2661. [2023-02-18 21:00:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2538 states have (on average 1.4231678486997636) internal successors, (3612), 2611 states have internal predecessors, (3612), 72 states have call successors, (72), 7 states have call predecessors, (72), 7 states have return successors, (72), 42 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-18 21:00:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 3756 transitions. [2023-02-18 21:00:50,331 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 3756 transitions. Word has length 55 [2023-02-18 21:00:50,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:50,333 INFO L495 AbstractCegarLoop]: Abstraction has 2661 states and 3756 transitions. [2023-02-18 21:00:50,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 3756 transitions. [2023-02-18 21:00:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 21:00:50,334 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:50,334 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] [2023-02-18 21:00:50,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-02-18 21:00:50,334 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:50,335 INFO L85 PathProgramCache]: Analyzing trace with hash 653857773, now seen corresponding path program 1 times [2023-02-18 21:00:50,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:50,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662382026] [2023-02-18 21:00:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:50,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:50,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:50,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:50,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662382026] [2023-02-18 21:00:50,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662382026] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:50,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:50,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 21:00:50,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849346229] [2023-02-18 21:00:50,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:50,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 21:00:50,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:50,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 21:00:50,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-18 21:00:50,541 INFO L87 Difference]: Start difference. First operand 2661 states and 3756 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:51,195 INFO L93 Difference]: Finished difference Result 3926 states and 5621 transitions. [2023-02-18 21:00:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 21:00:51,196 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 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 55 [2023-02-18 21:00:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:51,205 INFO L225 Difference]: With dead ends: 3926 [2023-02-18 21:00:51,205 INFO L226 Difference]: Without dead ends: 3926 [2023-02-18 21:00:51,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-18 21:00:51,205 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1156 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:51,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1158 Valid, 1047 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 21:00:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2023-02-18 21:00:51,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 2971. [2023-02-18 21:00:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2814 states have (on average 1.4129353233830846) internal successors, (3976), 2911 states have internal predecessors, (3976), 103 states have call successors, (103), 10 states have call predecessors, (103), 10 states have return successors, (103), 49 states have call predecessors, (103), 103 states have call successors, (103) [2023-02-18 21:00:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 4182 transitions. [2023-02-18 21:00:51,242 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 4182 transitions. Word has length 55 [2023-02-18 21:00:51,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:51,243 INFO L495 AbstractCegarLoop]: Abstraction has 2971 states and 4182 transitions. [2023-02-18 21:00:51,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:51,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 4182 transitions. [2023-02-18 21:00:51,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 21:00:51,244 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:51,244 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] [2023-02-18 21:00:51,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-02-18 21:00:51,244 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:51,245 INFO L85 PathProgramCache]: Analyzing trace with hash 653857774, now seen corresponding path program 1 times [2023-02-18 21:00:51,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:51,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444466792] [2023-02-18 21:00:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:51,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:51,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:51,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:51,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444466792] [2023-02-18 21:00:51,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444466792] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:51,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:51,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 21:00:51,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729228180] [2023-02-18 21:00:51,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:51,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 21:00:51,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:51,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 21:00:51,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 21:00:51,583 INFO L87 Difference]: Start difference. First operand 2971 states and 4182 transitions. Second operand has 11 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:52,071 INFO L93 Difference]: Finished difference Result 4020 states and 5768 transitions. [2023-02-18 21:00:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 21:00:52,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 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 55 [2023-02-18 21:00:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:52,077 INFO L225 Difference]: With dead ends: 4020 [2023-02-18 21:00:52,077 INFO L226 Difference]: Without dead ends: 4020 [2023-02-18 21:00:52,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-02-18 21:00:52,079 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1038 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:52,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 819 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 21:00:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4020 states. [2023-02-18 21:00:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4020 to 3244. [2023-02-18 21:00:52,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3075 states have (on average 1.4334959349593497) internal successors, (4408), 3176 states have internal predecessors, (4408), 113 states have call successors, (113), 12 states have call predecessors, (113), 12 states have return successors, (113), 55 states have call predecessors, (113), 113 states have call successors, (113) [2023-02-18 21:00:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 4634 transitions. [2023-02-18 21:00:52,112 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 4634 transitions. Word has length 55 [2023-02-18 21:00:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:52,113 INFO L495 AbstractCegarLoop]: Abstraction has 3244 states and 4634 transitions. [2023-02-18 21:00:52,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 4634 transitions. [2023-02-18 21:00:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 21:00:52,114 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:52,114 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:52,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-02-18 21:00:52,114 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:52,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1297077153, now seen corresponding path program 1 times [2023-02-18 21:00:52,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:52,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463142224] [2023-02-18 21:00:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:52,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:52,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:52,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-18 21:00:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:00:52,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:52,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463142224] [2023-02-18 21:00:52,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463142224] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:00:52,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575320936] [2023-02-18 21:00:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:52,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:00:52,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:00:52,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 21:00:52,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 21:00:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:52,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-18 21:00:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:00:52,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:00:52,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-18 21:00:52,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 21:00:52,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 21:00:52,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:00:52,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-18 21:00:52,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:00:52,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-18 21:00:52,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-18 21:00:52,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-18 21:00:52,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-02-18 21:00:52,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-02-18 21:00:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:52,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 21:00:52,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575320936] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:52,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 21:00:52,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 24 [2023-02-18 21:00:52,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160363613] [2023-02-18 21:00:52,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:52,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 21:00:52,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:52,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 21:00:52,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2023-02-18 21:00:52,891 INFO L87 Difference]: Start difference. First operand 3244 states and 4634 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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) [2023-02-18 21:00:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:53,300 INFO L93 Difference]: Finished difference Result 4290 states and 6114 transitions. [2023-02-18 21:00:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 21:00:53,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 56 [2023-02-18 21:00:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:53,309 INFO L225 Difference]: With dead ends: 4290 [2023-02-18 21:00:53,309 INFO L226 Difference]: Without dead ends: 4290 [2023-02-18 21:00:53,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 21:00:53,311 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 706 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:53,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 1197 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 21:00:53,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2023-02-18 21:00:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 3287. [2023-02-18 21:00:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3287 states, 3119 states have (on average 1.4260981083680666) internal successors, (4448), 3219 states have internal predecessors, (4448), 112 states have call successors, (112), 12 states have call predecessors, (112), 12 states have return successors, (112), 55 states have call predecessors, (112), 112 states have call successors, (112) [2023-02-18 21:00:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3287 states to 3287 states and 4672 transitions. [2023-02-18 21:00:53,345 INFO L78 Accepts]: Start accepts. Automaton has 3287 states and 4672 transitions. Word has length 56 [2023-02-18 21:00:53,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:53,345 INFO L495 AbstractCegarLoop]: Abstraction has 3287 states and 4672 transitions. [2023-02-18 21:00:53,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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) [2023-02-18 21:00:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3287 states and 4672 transitions. [2023-02-18 21:00:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 21:00:53,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:53,346 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] [2023-02-18 21:00:53,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 21:00:53,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:00:53,553 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:53,553 INFO L85 PathProgramCache]: Analyzing trace with hash 528923948, now seen corresponding path program 1 times [2023-02-18 21:00:53,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:53,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741283388] [2023-02-18 21:00:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:53,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:53,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:53,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:53,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741283388] [2023-02-18 21:00:53,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741283388] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:53,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:53,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-18 21:00:53,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480022755] [2023-02-18 21:00:53,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:53,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 21:00:53,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 21:00:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-02-18 21:00:53,920 INFO L87 Difference]: Start difference. First operand 3287 states and 4672 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:54,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:54,694 INFO L93 Difference]: Finished difference Result 5121 states and 7327 transitions. [2023-02-18 21:00:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 21:00:54,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 states have internal predecessors, (54), 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 56 [2023-02-18 21:00:54,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:54,701 INFO L225 Difference]: With dead ends: 5121 [2023-02-18 21:00:54,701 INFO L226 Difference]: Without dead ends: 5121 [2023-02-18 21:00:54,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=289, Invalid=703, Unknown=0, NotChecked=0, Total=992 [2023-02-18 21:00:54,702 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1557 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:54,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1559 Valid, 1503 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 21:00:54,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5121 states. [2023-02-18 21:00:54,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5121 to 3798. [2023-02-18 21:00:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3582 states have (on average 1.4095477386934674) internal successors, (5049), 3716 states have internal predecessors, (5049), 156 states have call successors, (156), 16 states have call predecessors, (156), 16 states have return successors, (156), 65 states have call predecessors, (156), 156 states have call successors, (156) [2023-02-18 21:00:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 5361 transitions. [2023-02-18 21:00:54,758 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 5361 transitions. Word has length 56 [2023-02-18 21:00:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:54,758 INFO L495 AbstractCegarLoop]: Abstraction has 3798 states and 5361 transitions. [2023-02-18 21:00:54,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 5361 transitions. [2023-02-18 21:00:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 21:00:54,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:54,760 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] [2023-02-18 21:00:54,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-02-18 21:00:54,760 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash 528923949, now seen corresponding path program 1 times [2023-02-18 21:00:54,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:54,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727981869] [2023-02-18 21:00:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:54,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:55,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:55,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:55,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727981869] [2023-02-18 21:00:55,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727981869] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:00:55,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:00:55,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-02-18 21:00:55,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88374375] [2023-02-18 21:00:55,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:00:55,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 21:00:55,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:55,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 21:00:55,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-02-18 21:00:55,386 INFO L87 Difference]: Start difference. First operand 3798 states and 5361 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:56,281 INFO L93 Difference]: Finished difference Result 5151 states and 7355 transitions. [2023-02-18 21:00:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 21:00:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 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 56 [2023-02-18 21:00:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:56,290 INFO L225 Difference]: With dead ends: 5151 [2023-02-18 21:00:56,290 INFO L226 Difference]: Without dead ends: 5151 [2023-02-18 21:00:56,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2023-02-18 21:00:56,291 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 2304 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2305 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:56,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2305 Valid, 1287 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 21:00:56,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2023-02-18 21:00:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3464. [2023-02-18 21:00:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3464 states, 3282 states have (on average 1.4177330895795246) internal successors, (4653), 3392 states have internal predecessors, (4653), 125 states have call successors, (125), 13 states have call predecessors, (125), 13 states have return successors, (125), 58 states have call predecessors, (125), 125 states have call successors, (125) [2023-02-18 21:00:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3464 states to 3464 states and 4903 transitions. [2023-02-18 21:00:56,347 INFO L78 Accepts]: Start accepts. Automaton has 3464 states and 4903 transitions. Word has length 56 [2023-02-18 21:00:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:56,347 INFO L495 AbstractCegarLoop]: Abstraction has 3464 states and 4903 transitions. [2023-02-18 21:00:56,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:00:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3464 states and 4903 transitions. [2023-02-18 21:00:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 21:00:56,349 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:56,349 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:56,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-02-18 21:00:56,349 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:56,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:56,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1776354176, now seen corresponding path program 1 times [2023-02-18 21:00:56,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:56,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361211535] [2023-02-18 21:00:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:56,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:56,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:56,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 21:00:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:00:56,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:56,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361211535] [2023-02-18 21:00:56,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361211535] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:00:56,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311218990] [2023-02-18 21:00:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:56,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:00:56,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:00:56,887 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 21:00:56,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 21:00:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:57,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-18 21:00:57,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:00:57,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 21:00:57,109 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 [2023-02-18 21:00:57,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:00:57,133 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 29 treesize of output 28 [2023-02-18 21:00:57,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:00:57,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 79 [2023-02-18 21:00:57,227 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 23 treesize of output 9 [2023-02-18 21:00:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:00:57,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:00:57,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311218990] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:00:57,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 21:00:57,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2023-02-18 21:00:57,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164226898] [2023-02-18 21:00:57,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 21:00:57,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 21:00:57,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:00:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 21:00:57,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-02-18 21:00:57,429 INFO L87 Difference]: Start difference. First operand 3464 states and 4903 transitions. Second operand has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 25 states have internal predecessors, (105), 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) [2023-02-18 21:00:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:00:58,808 INFO L93 Difference]: Finished difference Result 5808 states and 8265 transitions. [2023-02-18 21:00:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 21:00:58,809 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 25 states have internal predecessors, (105), 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 57 [2023-02-18 21:00:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:00:58,840 INFO L225 Difference]: With dead ends: 5808 [2023-02-18 21:00:58,841 INFO L226 Difference]: Without dead ends: 5808 [2023-02-18 21:00:58,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 21:00:58,842 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 3076 mSDsluCounter, 2037 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3077 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:00:58,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3077 Valid, 2183 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1711 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 21:00:58,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2023-02-18 21:00:58,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4434. [2023-02-18 21:00:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 4170 states have (on average 1.394484412470024) internal successors, (5815), 4321 states have internal predecessors, (5815), 200 states have call successors, (200), 20 states have call predecessors, (200), 20 states have return successors, (200), 92 states have call predecessors, (200), 200 states have call successors, (200) [2023-02-18 21:00:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 6215 transitions. [2023-02-18 21:00:58,919 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 6215 transitions. Word has length 57 [2023-02-18 21:00:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:00:58,919 INFO L495 AbstractCegarLoop]: Abstraction has 4434 states and 6215 transitions. [2023-02-18 21:00:58,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 25 states have internal predecessors, (105), 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) [2023-02-18 21:00:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 6215 transitions. [2023-02-18 21:00:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 21:00:58,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:00:58,920 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:00:58,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 21:00:59,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-18 21:00:59,126 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:00:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:00:59,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1776354177, now seen corresponding path program 1 times [2023-02-18 21:00:59,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:00:59,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255951829] [2023-02-18 21:00:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:59,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:00:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:59,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:00:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:59,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 21:00:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:00:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:00:59,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:00:59,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255951829] [2023-02-18 21:00:59,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255951829] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:00:59,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5684503] [2023-02-18 21:00:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:00:59,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:00:59,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:00:59,981 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 21:00:59,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 21:01:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:00,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-18 21:01:00,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:01:00,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 21:01:00,308 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 [2023-02-18 21:01:00,310 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 [2023-02-18 21:01:00,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:00,347 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 42 treesize of output 33 [2023-02-18 21:01:00,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:00,354 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 27 treesize of output 26 [2023-02-18 21:01:00,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:00,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-18 21:01:00,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:01:00,457 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 19 treesize of output 23 [2023-02-18 21:01:00,560 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:00,560 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 [2023-02-18 21:01:00,563 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:00,563 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 21 treesize of output 9 [2023-02-18 21:01:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:00,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:01:00,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5684503] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:00,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 21:01:00,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 32 [2023-02-18 21:01:00,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844757281] [2023-02-18 21:01:00,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 21:01:00,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 21:01:00,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:00,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 21:01:00,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 21:01:00,809 INFO L87 Difference]: Start difference. First operand 4434 states and 6215 transitions. Second operand has 33 states, 32 states have (on average 3.3125) internal successors, (106), 31 states have internal predecessors, (106), 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) [2023-02-18 21:01:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:04,328 INFO L93 Difference]: Finished difference Result 6827 states and 9726 transitions. [2023-02-18 21:01:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 21:01:04,329 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.3125) internal successors, (106), 31 states have internal predecessors, (106), 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 57 [2023-02-18 21:01:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:04,337 INFO L225 Difference]: With dead ends: 6827 [2023-02-18 21:01:04,337 INFO L226 Difference]: Without dead ends: 6827 [2023-02-18 21:01:04,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1140, Invalid=5502, Unknown=0, NotChecked=0, Total=6642 [2023-02-18 21:01:04,339 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 7565 mSDsluCounter, 2345 mSDsCounter, 0 mSdLazyCounter, 2629 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7565 SdHoareTripleChecker+Valid, 2472 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:04,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7565 Valid, 2472 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2629 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-18 21:01:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6827 states. [2023-02-18 21:01:04,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6827 to 5002. [2023-02-18 21:01:04,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5002 states, 4714 states have (on average 1.4202375901569793) internal successors, (6695), 4871 states have internal predecessors, (6695), 220 states have call successors, (220), 24 states have call predecessors, (220), 24 states have return successors, (220), 106 states have call predecessors, (220), 220 states have call successors, (220) [2023-02-18 21:01:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5002 states to 5002 states and 7135 transitions. [2023-02-18 21:01:04,403 INFO L78 Accepts]: Start accepts. Automaton has 5002 states and 7135 transitions. Word has length 57 [2023-02-18 21:01:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:04,404 INFO L495 AbstractCegarLoop]: Abstraction has 5002 states and 7135 transitions. [2023-02-18 21:01:04,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.3125) internal successors, (106), 31 states have internal predecessors, (106), 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) [2023-02-18 21:01:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5002 states and 7135 transitions. [2023-02-18 21:01:04,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 21:01:04,405 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:04,405 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, 1] [2023-02-18 21:01:04,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 21:01:04,611 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,SelfDestructingSolverStorable49 [2023-02-18 21:01:04,611 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:04,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:04,612 INFO L85 PathProgramCache]: Analyzing trace with hash -783228031, now seen corresponding path program 1 times [2023-02-18 21:01:04,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:04,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351795022] [2023-02-18 21:01:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:04,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:04,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:04,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:04,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351795022] [2023-02-18 21:01:04,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351795022] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:04,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934965226] [2023-02-18 21:01:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:04,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:04,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:01:04,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 21:01:04,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 21:01:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:04,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 21:01:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:01:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:04,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 21:01:04,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934965226] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:04,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 21:01:04,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-02-18 21:01:04,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827322933] [2023-02-18 21:01:04,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:04,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:01:04,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:04,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:01:04,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:01:04,791 INFO L87 Difference]: Start difference. First operand 5002 states and 7135 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:01:04,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:04,816 INFO L93 Difference]: Finished difference Result 6846 states and 9887 transitions. [2023-02-18 21:01:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:01:04,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 57 [2023-02-18 21:01:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:04,824 INFO L225 Difference]: With dead ends: 6846 [2023-02-18 21:01:04,824 INFO L226 Difference]: Without dead ends: 6846 [2023-02-18 21:01:04,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:01:04,824 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 334 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 364 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 [2023-02-18 21:01:04,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 364 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:01:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2023-02-18 21:01:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 6447. [2023-02-18 21:01:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6447 states, 6119 states have (on average 1.448439287465272) internal successors, (8863), 6276 states have internal predecessors, (8863), 260 states have call successors, (260), 24 states have call predecessors, (260), 24 states have return successors, (260), 146 states have call predecessors, (260), 260 states have call successors, (260) [2023-02-18 21:01:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6447 states to 6447 states and 9383 transitions. [2023-02-18 21:01:04,906 INFO L78 Accepts]: Start accepts. Automaton has 6447 states and 9383 transitions. Word has length 57 [2023-02-18 21:01:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:04,906 INFO L495 AbstractCegarLoop]: Abstraction has 6447 states and 9383 transitions. [2023-02-18 21:01:04,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:01:04,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6447 states and 9383 transitions. [2023-02-18 21:01:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-18 21:01:04,908 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:04,908 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, 1, 1] [2023-02-18 21:01:04,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 21:01:05,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:05,114 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:05,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash 355545581, now seen corresponding path program 1 times [2023-02-18 21:01:05,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:05,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402354743] [2023-02-18 21:01:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:05,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:05,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:05,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:01:05,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:05,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402354743] [2023-02-18 21:01:05,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402354743] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:05,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:05,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-18 21:01:05,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650080376] [2023-02-18 21:01:05,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:05,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 21:01:05,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:05,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 21:01:05,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-02-18 21:01:05,571 INFO L87 Difference]: Start difference. First operand 6447 states and 9383 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:06,580 INFO L93 Difference]: Finished difference Result 10677 states and 15305 transitions. [2023-02-18 21:01:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 21:01:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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 58 [2023-02-18 21:01:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:06,593 INFO L225 Difference]: With dead ends: 10677 [2023-02-18 21:01:06,593 INFO L226 Difference]: Without dead ends: 10677 [2023-02-18 21:01:06,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 21:01:06,595 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1814 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1814 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:06,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1814 Valid, 2155 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 21:01:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2023-02-18 21:01:06,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 6355. [2023-02-18 21:01:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6355 states, 6027 states have (on average 1.4423427907748465) internal successors, (8693), 6184 states have internal predecessors, (8693), 260 states have call successors, (260), 24 states have call predecessors, (260), 24 states have return successors, (260), 146 states have call predecessors, (260), 260 states have call successors, (260) [2023-02-18 21:01:06,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 9213 transitions. [2023-02-18 21:01:06,671 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 9213 transitions. Word has length 58 [2023-02-18 21:01:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:06,671 INFO L495 AbstractCegarLoop]: Abstraction has 6355 states and 9213 transitions. [2023-02-18 21:01:06,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 9213 transitions. [2023-02-18 21:01:06,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 21:01:06,672 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:06,672 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, 1, 1, 1] [2023-02-18 21:01:06,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-02-18 21:01:06,673 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1061403003, now seen corresponding path program 1 times [2023-02-18 21:01:06,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:06,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878292969] [2023-02-18 21:01:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:06,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:07,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:07,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:07,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878292969] [2023-02-18 21:01:07,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878292969] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:07,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:07,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-18 21:01:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220958553] [2023-02-18 21:01:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:07,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 21:01:07,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 21:01:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-18 21:01:07,117 INFO L87 Difference]: Start difference. First operand 6355 states and 9213 transitions. Second operand has 16 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:01:07,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:07,790 INFO L93 Difference]: Finished difference Result 7042 states and 10239 transitions. [2023-02-18 21:01:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 21:01:07,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 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 59 [2023-02-18 21:01:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:07,801 INFO L225 Difference]: With dead ends: 7042 [2023-02-18 21:01:07,801 INFO L226 Difference]: Without dead ends: 7042 [2023-02-18 21:01:07,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2023-02-18 21:01:07,802 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1478 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:07,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 1187 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 21:01:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7042 states. [2023-02-18 21:01:07,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7042 to 6420. [2023-02-18 21:01:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6420 states, 6092 states have (on average 1.4427117531188445) internal successors, (8789), 6249 states have internal predecessors, (8789), 260 states have call successors, (260), 24 states have call predecessors, (260), 24 states have return successors, (260), 146 states have call predecessors, (260), 260 states have call successors, (260) [2023-02-18 21:01:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6420 states to 6420 states and 9309 transitions. [2023-02-18 21:01:07,856 INFO L78 Accepts]: Start accepts. Automaton has 6420 states and 9309 transitions. Word has length 59 [2023-02-18 21:01:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:07,857 INFO L495 AbstractCegarLoop]: Abstraction has 6420 states and 9309 transitions. [2023-02-18 21:01:07,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:01:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6420 states and 9309 transitions. [2023-02-18 21:01:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 21:01:07,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:07,859 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, 1, 1, 1] [2023-02-18 21:01:07,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-02-18 21:01:07,859 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1870749629, now seen corresponding path program 1 times [2023-02-18 21:01:07,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:07,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453669525] [2023-02-18 21:01:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:07,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:08,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:08,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:08,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453669525] [2023-02-18 21:01:08,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453669525] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:08,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:08,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 21:01:08,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091082475] [2023-02-18 21:01:08,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:08,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 21:01:08,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 21:01:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 21:01:08,102 INFO L87 Difference]: Start difference. First operand 6420 states and 9309 transitions. Second operand has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:01:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:08,477 INFO L93 Difference]: Finished difference Result 7453 states and 10796 transitions. [2023-02-18 21:01:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 21:01:08,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 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 59 [2023-02-18 21:01:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:08,486 INFO L225 Difference]: With dead ends: 7453 [2023-02-18 21:01:08,486 INFO L226 Difference]: Without dead ends: 7453 [2023-02-18 21:01:08,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2023-02-18 21:01:08,487 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 1178 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:08,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 886 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 21:01:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7453 states. [2023-02-18 21:01:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7453 to 6420. [2023-02-18 21:01:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6420 states, 6092 states have (on average 1.4427117531188445) internal successors, (8789), 6249 states have internal predecessors, (8789), 260 states have call successors, (260), 24 states have call predecessors, (260), 24 states have return successors, (260), 146 states have call predecessors, (260), 260 states have call successors, (260) [2023-02-18 21:01:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6420 states to 6420 states and 9309 transitions. [2023-02-18 21:01:08,543 INFO L78 Accepts]: Start accepts. Automaton has 6420 states and 9309 transitions. Word has length 59 [2023-02-18 21:01:08,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:08,544 INFO L495 AbstractCegarLoop]: Abstraction has 6420 states and 9309 transitions. [2023-02-18 21:01:08,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:01:08,544 INFO L276 IsEmpty]: Start isEmpty. Operand 6420 states and 9309 transitions. [2023-02-18 21:01:08,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 21:01:08,545 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:08,545 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, 1, 1, 1, 1] [2023-02-18 21:01:08,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-02-18 21:01:08,545 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1910438407, now seen corresponding path program 1 times [2023-02-18 21:01:08,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:08,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270490299] [2023-02-18 21:01:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:08,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:08,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:08,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:01:08,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:08,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270490299] [2023-02-18 21:01:08,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270490299] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:08,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:08,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 21:01:08,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203183623] [2023-02-18 21:01:08,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:08,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:01:08,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:08,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:01:08,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:01:08,704 INFO L87 Difference]: Start difference. First operand 6420 states and 9309 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:08,888 INFO L93 Difference]: Finished difference Result 7876 states and 10976 transitions. [2023-02-18 21:01:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 21:01:08,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 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 60 [2023-02-18 21:01:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:08,897 INFO L225 Difference]: With dead ends: 7876 [2023-02-18 21:01:08,897 INFO L226 Difference]: Without dead ends: 7876 [2023-02-18 21:01:08,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-02-18 21:01:08,897 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 468 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:08,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 353 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:01:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2023-02-18 21:01:08,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 6417. [2023-02-18 21:01:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6417 states, 6092 states have (on average 1.3964215364412345) internal successors, (8507), 6246 states have internal predecessors, (8507), 260 states have call successors, (260), 24 states have call predecessors, (260), 24 states have return successors, (260), 146 states have call predecessors, (260), 260 states have call successors, (260) [2023-02-18 21:01:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6417 states to 6417 states and 9027 transitions. [2023-02-18 21:01:08,954 INFO L78 Accepts]: Start accepts. Automaton has 6417 states and 9027 transitions. Word has length 60 [2023-02-18 21:01:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:08,954 INFO L495 AbstractCegarLoop]: Abstraction has 6417 states and 9027 transitions. [2023-02-18 21:01:08,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 6417 states and 9027 transitions. [2023-02-18 21:01:08,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 21:01:08,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:08,955 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:08,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-02-18 21:01:08,955 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:08,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:08,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1346211993, now seen corresponding path program 1 times [2023-02-18 21:01:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:08,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627482970] [2023-02-18 21:01:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:08,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:08,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:08,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 21:01:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 21:01:08,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:08,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627482970] [2023-02-18 21:01:08,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627482970] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:08,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:08,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:01:08,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968950832] [2023-02-18 21:01:08,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:08,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 21:01:08,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:08,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 21:01:08,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:01:08,983 INFO L87 Difference]: Start difference. First operand 6417 states and 9027 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:01:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:09,001 INFO L93 Difference]: Finished difference Result 6417 states and 8989 transitions. [2023-02-18 21:01:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 21:01:09,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 60 [2023-02-18 21:01:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:09,007 INFO L225 Difference]: With dead ends: 6417 [2023-02-18 21:01:09,007 INFO L226 Difference]: Without dead ends: 6417 [2023-02-18 21:01:09,007 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 [2023-02-18 21:01:09,007 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 0 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 314 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 [2023-02-18 21:01:09,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 314 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:01:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6417 states. [2023-02-18 21:01:09,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6417 to 6417. [2023-02-18 21:01:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6417 states, 6092 states have (on average 1.3901838476690742) internal successors, (8469), 6246 states have internal predecessors, (8469), 260 states have call successors, (260), 24 states have call predecessors, (260), 24 states have return successors, (260), 146 states have call predecessors, (260), 260 states have call successors, (260) [2023-02-18 21:01:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6417 states to 6417 states and 8989 transitions. [2023-02-18 21:01:09,055 INFO L78 Accepts]: Start accepts. Automaton has 6417 states and 8989 transitions. Word has length 60 [2023-02-18 21:01:09,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:09,055 INFO L495 AbstractCegarLoop]: Abstraction has 6417 states and 8989 transitions. [2023-02-18 21:01:09,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:01:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 6417 states and 8989 transitions. [2023-02-18 21:01:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-18 21:01:09,056 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:09,057 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:09,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-02-18 21:01:09,057 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:09,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:09,057 INFO L85 PathProgramCache]: Analyzing trace with hash -707292911, now seen corresponding path program 1 times [2023-02-18 21:01:09,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:09,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109463139] [2023-02-18 21:01:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:09,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:09,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:09,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:09,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109463139] [2023-02-18 21:01:09,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109463139] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:09,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734089698] [2023-02-18 21:01:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:09,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:09,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:01:09,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 21:01:09,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 21:01:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:09,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 21:01:09,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:01:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:09,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:01:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:09,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734089698] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:01:09,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:01:09,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-02-18 21:01:09,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722035582] [2023-02-18 21:01:09,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:01:09,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 21:01:09,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:09,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 21:01:09,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:01:09,255 INFO L87 Difference]: Start difference. First operand 6417 states and 8989 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:09,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:09,296 INFO L93 Difference]: Finished difference Result 13091 states and 18347 transitions. [2023-02-18 21:01:09,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 21:01:09,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 62 [2023-02-18 21:01:09,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:09,313 INFO L225 Difference]: With dead ends: 13091 [2023-02-18 21:01:09,313 INFO L226 Difference]: Without dead ends: 13091 [2023-02-18 21:01:09,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:01:09,314 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 442 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:09,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 705 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:01:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13091 states. [2023-02-18 21:01:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13091 to 10090. [2023-02-18 21:01:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10090 states, 9631 states have (on average 1.397258851624961) internal successors, (13457), 9815 states have internal predecessors, (13457), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-18 21:01:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10090 states to 10090 states and 14245 transitions. [2023-02-18 21:01:09,427 INFO L78 Accepts]: Start accepts. Automaton has 10090 states and 14245 transitions. Word has length 62 [2023-02-18 21:01:09,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:09,428 INFO L495 AbstractCegarLoop]: Abstraction has 10090 states and 14245 transitions. [2023-02-18 21:01:09,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:09,428 INFO L276 IsEmpty]: Start isEmpty. Operand 10090 states and 14245 transitions. [2023-02-18 21:01:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 21:01:09,429 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:09,429 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:09,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 21:01:09,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:09,645 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:09,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:09,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1258787836, now seen corresponding path program 1 times [2023-02-18 21:01:09,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:09,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704561887] [2023-02-18 21:01:09,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:09,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:09,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:09,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 21:01:09,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:09,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704561887] [2023-02-18 21:01:09,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704561887] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:09,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:09,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 21:01:09,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133268303] [2023-02-18 21:01:09,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:09,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 21:01:09,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:09,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 21:01:09,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-18 21:01:09,866 INFO L87 Difference]: Start difference. First operand 10090 states and 14245 transitions. Second operand has 11 states, 10 states have (on average 5.5) internal successors, (55), 8 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 21:01:10,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:10,210 INFO L93 Difference]: Finished difference Result 14230 states and 19840 transitions. [2023-02-18 21:01:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 21:01:10,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.5) internal successors, (55), 8 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2023-02-18 21:01:10,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:10,229 INFO L225 Difference]: With dead ends: 14230 [2023-02-18 21:01:10,229 INFO L226 Difference]: Without dead ends: 14230 [2023-02-18 21:01:10,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2023-02-18 21:01:10,230 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 700 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:10,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 1363 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 21:01:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14230 states. [2023-02-18 21:01:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14230 to 10088. [2023-02-18 21:01:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10088 states, 9631 states have (on average 1.3924826082442114) internal successors, (13411), 9813 states have internal predecessors, (13411), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-18 21:01:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10088 states to 10088 states and 14199 transitions. [2023-02-18 21:01:10,418 INFO L78 Accepts]: Start accepts. Automaton has 10088 states and 14199 transitions. Word has length 63 [2023-02-18 21:01:10,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:10,420 INFO L495 AbstractCegarLoop]: Abstraction has 10088 states and 14199 transitions. [2023-02-18 21:01:10,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.5) internal successors, (55), 8 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 21:01:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 10088 states and 14199 transitions. [2023-02-18 21:01:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 21:01:10,422 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:10,422 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:10,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-02-18 21:01:10,422 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:10,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:10,423 INFO L85 PathProgramCache]: Analyzing trace with hash 940111791, now seen corresponding path program 1 times [2023-02-18 21:01:10,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:10,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686591067] [2023-02-18 21:01:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:10,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:10,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:10,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 21:01:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 21:01:10,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:10,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686591067] [2023-02-18 21:01:10,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686591067] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:10,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:10,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:01:10,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690571938] [2023-02-18 21:01:10,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:10,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:01:10,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:10,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:01:10,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:01:10,469 INFO L87 Difference]: Start difference. First operand 10088 states and 14199 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:01:10,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:10,510 INFO L93 Difference]: Finished difference Result 15511 states and 21994 transitions. [2023-02-18 21:01:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:01:10,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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 63 [2023-02-18 21:01:10,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:10,531 INFO L225 Difference]: With dead ends: 15511 [2023-02-18 21:01:10,531 INFO L226 Difference]: Without dead ends: 15511 [2023-02-18 21:01:10,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:01:10,532 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 406 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:10,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 496 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:01:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15511 states. [2023-02-18 21:01:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15511 to 10144. [2023-02-18 21:01:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 9687 states have (on average 1.3912459997935378) internal successors, (13477), 9869 states have internal predecessors, (13477), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-18 21:01:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 14265 transitions. [2023-02-18 21:01:10,666 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 14265 transitions. Word has length 63 [2023-02-18 21:01:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:10,667 INFO L495 AbstractCegarLoop]: Abstraction has 10144 states and 14265 transitions. [2023-02-18 21:01:10,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 21:01:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 14265 transitions. [2023-02-18 21:01:10,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 21:01:10,668 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:10,668 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:10,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-02-18 21:01:10,668 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:10,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:10,668 INFO L85 PathProgramCache]: Analyzing trace with hash 940111853, now seen corresponding path program 1 times [2023-02-18 21:01:10,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:10,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775901862] [2023-02-18 21:01:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:10,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:10,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:10,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 21:01:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 21:01:10,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:10,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775901862] [2023-02-18 21:01:10,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775901862] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:10,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:10,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:01:10,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648455347] [2023-02-18 21:01:10,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:10,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:01:10,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:10,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:01:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:01:10,722 INFO L87 Difference]: Start difference. First operand 10144 states and 14265 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 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) [2023-02-18 21:01:10,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:10,891 INFO L93 Difference]: Finished difference Result 10924 states and 15639 transitions. [2023-02-18 21:01:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 21:01:10,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 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 63 [2023-02-18 21:01:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:10,905 INFO L225 Difference]: With dead ends: 10924 [2023-02-18 21:01:10,905 INFO L226 Difference]: Without dead ends: 10924 [2023-02-18 21:01:10,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-18 21:01:10,905 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 141 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:10,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 615 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:01:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10924 states. [2023-02-18 21:01:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10924 to 10144. [2023-02-18 21:01:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 9687 states have (on average 1.3888716836998038) internal successors, (13454), 9869 states have internal predecessors, (13454), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-18 21:01:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 14242 transitions. [2023-02-18 21:01:11,007 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 14242 transitions. Word has length 63 [2023-02-18 21:01:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:11,008 INFO L495 AbstractCegarLoop]: Abstraction has 10144 states and 14242 transitions. [2023-02-18 21:01:11,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 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) [2023-02-18 21:01:11,008 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 14242 transitions. [2023-02-18 21:01:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 21:01:11,008 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:11,009 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:11,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2023-02-18 21:01:11,009 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash 940111854, now seen corresponding path program 1 times [2023-02-18 21:01:11,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:11,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992670957] [2023-02-18 21:01:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:11,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:11,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:11,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 21:01:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 21:01:11,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:11,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992670957] [2023-02-18 21:01:11,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992670957] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:11,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:11,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:01:11,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104057317] [2023-02-18 21:01:11,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:11,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:01:11,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:11,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:01:11,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:01:11,091 INFO L87 Difference]: Start difference. First operand 10144 states and 14242 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 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) [2023-02-18 21:01:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:11,252 INFO L93 Difference]: Finished difference Result 10140 states and 14042 transitions. [2023-02-18 21:01:11,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 21:01:11,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 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 63 [2023-02-18 21:01:11,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:11,263 INFO L225 Difference]: With dead ends: 10140 [2023-02-18 21:01:11,263 INFO L226 Difference]: Without dead ends: 10140 [2023-02-18 21:01:11,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-18 21:01:11,264 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 145 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:11,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 594 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:01:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10140 states. [2023-02-18 21:01:11,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10140 to 10140. [2023-02-18 21:01:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10140 states, 9687 states have (on average 1.3682254567977703) internal successors, (13254), 9865 states have internal predecessors, (13254), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-18 21:01:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10140 states to 10140 states and 14042 transitions. [2023-02-18 21:01:11,352 INFO L78 Accepts]: Start accepts. Automaton has 10140 states and 14042 transitions. Word has length 63 [2023-02-18 21:01:11,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:11,352 INFO L495 AbstractCegarLoop]: Abstraction has 10140 states and 14042 transitions. [2023-02-18 21:01:11,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 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) [2023-02-18 21:01:11,352 INFO L276 IsEmpty]: Start isEmpty. Operand 10140 states and 14042 transitions. [2023-02-18 21:01:11,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 21:01:11,353 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:11,353 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:11,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2023-02-18 21:01:11,353 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:11,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:11,354 INFO L85 PathProgramCache]: Analyzing trace with hash -451244996, now seen corresponding path program 1 times [2023-02-18 21:01:11,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:11,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405214144] [2023-02-18 21:01:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:11,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:11,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:11,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405214144] [2023-02-18 21:01:11,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405214144] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144946790] [2023-02-18 21:01:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:11,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:11,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:01:11,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 21:01:11,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 21:01:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:12,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-18 21:01:12,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:01:12,256 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 [2023-02-18 21:01:12,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:12,293 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 [2023-02-18 21:01:12,360 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 39 treesize of output 15 [2023-02-18 21:01:12,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 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 43 treesize of output 52 [2023-02-18 21:01:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:12,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:01:14,554 WARN L837 $PredicateComparison]: unable to prove that (and (= ~unnamed1~0~LIST_BEG 0) (or (<= 0 (+ ~unnamed1~0~LIST_BEG (- 1))) (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (.cse1 (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* 4 ~unnamed1~0~LIST_END))) (.cse2 (+ |c_~#list~0.offset| (* 4 ~unnamed1~0~LIST_BEG)))) (and (forall ((v_ArrVal_1492 Int)) (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1492)) |c_~#list~0.base|) .cse2)))) (forall ((v_ArrVal_1492 Int)) (= (let ((.cse3 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1492)) |c_~#list~0.base|) .cse2))) (store |c_#valid| .cse3 (select |c_ULTIMATE.start_main_old_#valid#1| .cse3))) |c_ULTIMATE.start_main_old_#valid#1|)))) (and (= (+ ~unnamed1~0~LIST_END (* (- 1) ~unnamed1~0~LIST_BEG)) 0) (= (+ ~unnamed1~0~LIST_END (- 1)) 0)) (<= ~unnamed1~0~LIST_BEG (- 1)))) is different from false [2023-02-18 21:01:14,585 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 130 treesize of output 122 [2023-02-18 21:01:14,598 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 166 treesize of output 150 [2023-02-18 21:01:16,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144946790] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:16,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 21:01:16,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2023-02-18 21:01:16,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561989846] [2023-02-18 21:01:16,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 21:01:16,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 21:01:16,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 21:01:16,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1120, Unknown=1, NotChecked=68, Total=1332 [2023-02-18 21:01:16,501 INFO L87 Difference]: Start difference. First operand 10140 states and 14042 transitions. Second operand has 29 states, 28 states have (on average 4.142857142857143) internal successors, (116), 27 states have internal predecessors, (116), 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) [2023-02-18 21:01:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:17,726 INFO L93 Difference]: Finished difference Result 10396 states and 14376 transitions. [2023-02-18 21:01:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 21:01:17,727 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.142857142857143) internal successors, (116), 27 states have internal predecessors, (116), 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 63 [2023-02-18 21:01:17,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:17,743 INFO L225 Difference]: With dead ends: 10396 [2023-02-18 21:01:17,743 INFO L226 Difference]: Without dead ends: 10385 [2023-02-18 21:01:17,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=386, Invalid=1779, Unknown=1, NotChecked=90, Total=2256 [2023-02-18 21:01:17,744 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 1248 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1718 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:17,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 1718 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 21:01:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10385 states. [2023-02-18 21:01:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10385 to 10168. [2023-02-18 21:01:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10168 states, 9715 states have (on average 1.3678847143592383) internal successors, (13289), 9893 states have internal predecessors, (13289), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-18 21:01:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10168 states to 10168 states and 14077 transitions. [2023-02-18 21:01:17,829 INFO L78 Accepts]: Start accepts. Automaton has 10168 states and 14077 transitions. Word has length 63 [2023-02-18 21:01:17,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:17,829 INFO L495 AbstractCegarLoop]: Abstraction has 10168 states and 14077 transitions. [2023-02-18 21:01:17,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.142857142857143) internal successors, (116), 27 states have internal predecessors, (116), 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) [2023-02-18 21:01:17,829 INFO L276 IsEmpty]: Start isEmpty. Operand 10168 states and 14077 transitions. [2023-02-18 21:01:17,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 21:01:17,830 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:17,830 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:17,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 21:01:18,036 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,SelfDestructingSolverStorable61 [2023-02-18 21:01:18,037 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:18,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:18,037 INFO L85 PathProgramCache]: Analyzing trace with hash -193079558, now seen corresponding path program 1 times [2023-02-18 21:01:18,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:18,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646683470] [2023-02-18 21:01:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:18,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:18,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:18,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:18,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646683470] [2023-02-18 21:01:18,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646683470] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:18,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835550134] [2023-02-18 21:01:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:18,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:18,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:01:18,329 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) [2023-02-18 21:01:18,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 21:01:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:18,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 21:01:18,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:01:18,597 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 [2023-02-18 21:01:18,668 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:18,669 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 39 treesize of output 15 [2023-02-18 21:01:18,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2023-02-18 21:01:18,687 WARN L859 $PredicateComparison]: unable to prove that (and (= (+ ~unnamed1~0~LIST_END (- 1)) 0) (let ((.cse1 (exists ((|v_ULTIMATE.start_main_~cursor~1#1.base_18| Int)) (= (select |c_#valid| |v_ULTIMATE.start_main_~cursor~1#1.base_18|) 0)))) (or (exists ((|v_ULTIMATE.start_main_~cursor~1#1.base_18| Int)) (let ((.cse0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~cursor~1#1.base_18|))) (and (= 0 .cse0) (= (select |c_#valid| |v_ULTIMATE.start_main_~cursor~1#1.base_18|) 0) (= (store |c_#valid| |v_ULTIMATE.start_main_~cursor~1#1.base_18| .cse0) |c_ULTIMATE.start_main_old_#valid#1|)))) (and .cse1 (<= ~unnamed1~0~LIST_END 0)) (and .cse1 (<= 0 (+ ~unnamed1~0~LIST_END (- 2))))))) is different from true [2023-02-18 21:01:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-02-18 21:01:18,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:01:18,763 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 52 treesize of output 44 [2023-02-18 21:01:18,767 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 74 treesize of output 58 [2023-02-18 21:01:19,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835550134] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:19,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 21:01:19,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-02-18 21:01:19,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270662984] [2023-02-18 21:01:19,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 21:01:19,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 21:01:19,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 21:01:19,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=767, Unknown=1, NotChecked=56, Total=930 [2023-02-18 21:01:19,239 INFO L87 Difference]: Start difference. First operand 10168 states and 14077 transitions. Second operand has 23 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 23 states have internal predecessors, (116), 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) [2023-02-18 21:01:20,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:20,357 INFO L93 Difference]: Finished difference Result 10388 states and 14367 transitions. [2023-02-18 21:01:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 21:01:20,357 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 23 states have internal predecessors, (116), 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 63 [2023-02-18 21:01:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:20,369 INFO L225 Difference]: With dead ends: 10388 [2023-02-18 21:01:20,369 INFO L226 Difference]: Without dead ends: 10375 [2023-02-18 21:01:20,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=336, Invalid=1307, Unknown=1, NotChecked=78, Total=1722 [2023-02-18 21:01:20,370 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 1061 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:20,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 1426 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1028 Invalid, 0 Unknown, 283 Unchecked, 0.8s Time] [2023-02-18 21:01:20,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10375 states. [2023-02-18 21:01:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10375 to 10166. [2023-02-18 21:01:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10166 states, 9713 states have (on average 1.3677545557500257) internal successors, (13285), 9891 states have internal predecessors, (13285), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-18 21:01:20,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10166 states to 10166 states and 14073 transitions. [2023-02-18 21:01:20,451 INFO L78 Accepts]: Start accepts. Automaton has 10166 states and 14073 transitions. Word has length 63 [2023-02-18 21:01:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:20,452 INFO L495 AbstractCegarLoop]: Abstraction has 10166 states and 14073 transitions. [2023-02-18 21:01:20,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 23 states have internal predecessors, (116), 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) [2023-02-18 21:01:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 10166 states and 14073 transitions. [2023-02-18 21:01:20,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 21:01:20,453 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:20,453 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:20,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 21:01:20,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:20,659 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:20,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:20,659 INFO L85 PathProgramCache]: Analyzing trace with hash -367739905, now seen corresponding path program 1 times [2023-02-18 21:01:20,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:20,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091455025] [2023-02-18 21:01:20,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:20,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:20,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:20,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:01:20,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:20,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091455025] [2023-02-18 21:01:20,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091455025] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:20,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:20,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 21:01:20,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25784922] [2023-02-18 21:01:20,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:20,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 21:01:20,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:20,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 21:01:20,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 21:01:20,894 INFO L87 Difference]: Start difference. First operand 10166 states and 14073 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:21,495 INFO L93 Difference]: Finished difference Result 12407 states and 16929 transitions. [2023-02-18 21:01:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 21:01:21,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 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 64 [2023-02-18 21:01:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:21,511 INFO L225 Difference]: With dead ends: 12407 [2023-02-18 21:01:21,511 INFO L226 Difference]: Without dead ends: 12407 [2023-02-18 21:01:21,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2023-02-18 21:01:21,512 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 1034 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:21,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 1694 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 21:01:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12407 states. [2023-02-18 21:01:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12407 to 10166. [2023-02-18 21:01:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10166 states, 9713 states have (on average 1.3631215896221558) internal successors, (13240), 9891 states have internal predecessors, (13240), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-18 21:01:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10166 states to 10166 states and 14028 transitions. [2023-02-18 21:01:21,605 INFO L78 Accepts]: Start accepts. Automaton has 10166 states and 14028 transitions. Word has length 64 [2023-02-18 21:01:21,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:21,605 INFO L495 AbstractCegarLoop]: Abstraction has 10166 states and 14028 transitions. [2023-02-18 21:01:21,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 10166 states and 14028 transitions. [2023-02-18 21:01:21,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 21:01:21,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:21,606 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:21,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2023-02-18 21:01:21,607 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:21,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:21,607 INFO L85 PathProgramCache]: Analyzing trace with hash -966158781, now seen corresponding path program 1 times [2023-02-18 21:01:21,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:21,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65099532] [2023-02-18 21:01:21,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:21,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:22,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:22,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 21:01:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:01:22,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:22,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65099532] [2023-02-18 21:01:22,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65099532] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:22,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198527373] [2023-02-18 21:01:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:22,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:22,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:01:22,213 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) [2023-02-18 21:01:22,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 21:01:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:22,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-18 21:01:22,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:01:22,485 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 [2023-02-18 21:01:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:22,515 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 27 treesize of output 26 [2023-02-18 21:01:22,686 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 34 treesize of output 22 [2023-02-18 21:01:22,687 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 39 treesize of output 19 [2023-02-18 21:01:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:22,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:01:22,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:01:22,799 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 44 treesize of output 48 [2023-02-18 21:01:22,980 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 310 treesize of output 294 [2023-02-18 21:01:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:01:23,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198527373] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:01:23,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:01:23,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 49 [2023-02-18 21:01:23,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475392275] [2023-02-18 21:01:23,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:01:23,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 21:01:23,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:23,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 21:01:23,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2246, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 21:01:23,649 INFO L87 Difference]: Start difference. First operand 10166 states and 14028 transitions. Second operand has 50 states, 49 states have (on average 3.63265306122449) internal successors, (178), 47 states have internal predecessors, (178), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 21:01:28,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:28,472 INFO L93 Difference]: Finished difference Result 28840 states and 40583 transitions. [2023-02-18 21:01:28,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-18 21:01:28,472 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.63265306122449) internal successors, (178), 47 states have internal predecessors, (178), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 64 [2023-02-18 21:01:28,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:28,523 INFO L225 Difference]: With dead ends: 28840 [2023-02-18 21:01:28,524 INFO L226 Difference]: Without dead ends: 28840 [2023-02-18 21:01:28,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4958 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2710, Invalid=13802, Unknown=0, NotChecked=0, Total=16512 [2023-02-18 21:01:28,526 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 9840 mSDsluCounter, 5192 mSDsCounter, 0 mSdLazyCounter, 3668 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9841 SdHoareTripleChecker+Valid, 5414 SdHoareTripleChecker+Invalid, 4287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 3668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:28,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9841 Valid, 5414 Invalid, 4287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 3668 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-02-18 21:01:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28840 states. [2023-02-18 21:01:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28840 to 10610. [2023-02-18 21:01:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10147 states have (on average 1.363851384645708) internal successors, (13839), 10324 states have internal predecessors, (13839), 404 states have call successors, (404), 25 states have call predecessors, (404), 25 states have return successors, (404), 260 states have call predecessors, (404), 404 states have call successors, (404) [2023-02-18 21:01:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 14647 transitions. [2023-02-18 21:01:28,775 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 14647 transitions. Word has length 64 [2023-02-18 21:01:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:28,775 INFO L495 AbstractCegarLoop]: Abstraction has 10610 states and 14647 transitions. [2023-02-18 21:01:28,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.63265306122449) internal successors, (178), 47 states have internal predecessors, (178), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 21:01:28,775 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 14647 transitions. [2023-02-18 21:01:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 21:01:28,779 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:28,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:28,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 21:01:28,984 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,SelfDestructingSolverStorable64 [2023-02-18 21:01:28,985 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:28,986 INFO L85 PathProgramCache]: Analyzing trace with hash -966158782, now seen corresponding path program 1 times [2023-02-18 21:01:28,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:28,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466974490] [2023-02-18 21:01:28,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:28,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:29,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:29,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 21:01:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 21:01:29,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:29,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466974490] [2023-02-18 21:01:29,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466974490] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:29,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:29,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:01:29,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310098492] [2023-02-18 21:01:29,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:29,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:01:29,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:29,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:01:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:01:29,047 INFO L87 Difference]: Start difference. First operand 10610 states and 14647 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 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) [2023-02-18 21:01:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:29,273 INFO L93 Difference]: Finished difference Result 16310 states and 22414 transitions. [2023-02-18 21:01:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 21:01:29,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 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 64 [2023-02-18 21:01:29,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:29,298 INFO L225 Difference]: With dead ends: 16310 [2023-02-18 21:01:29,298 INFO L226 Difference]: Without dead ends: 16310 [2023-02-18 21:01:29,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:01:29,298 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 120 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:29,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 725 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:01:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16310 states. [2023-02-18 21:01:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16310 to 10608. [2023-02-18 21:01:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10147 states have (on average 1.3526165369074603) internal successors, (13725), 10322 states have internal predecessors, (13725), 404 states have call successors, (404), 25 states have call predecessors, (404), 25 states have return successors, (404), 260 states have call predecessors, (404), 404 states have call successors, (404) [2023-02-18 21:01:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 14533 transitions. [2023-02-18 21:01:29,446 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 14533 transitions. Word has length 64 [2023-02-18 21:01:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:29,446 INFO L495 AbstractCegarLoop]: Abstraction has 10608 states and 14533 transitions. [2023-02-18 21:01:29,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 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) [2023-02-18 21:01:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 14533 transitions. [2023-02-18 21:01:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-18 21:01:29,447 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:29,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:29,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2023-02-18 21:01:29,448 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:29,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:29,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1485673092, now seen corresponding path program 1 times [2023-02-18 21:01:29,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:29,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222374071] [2023-02-18 21:01:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:29,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:29,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:29,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:01:29,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:29,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222374071] [2023-02-18 21:01:29,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222374071] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:29,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049194854] [2023-02-18 21:01:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:29,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:29,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:01:29,930 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) [2023-02-18 21:01:29,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 21:01:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:30,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-18 21:01:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:01:30,102 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 [2023-02-18 21:01:30,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 21:01:30,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:30,237 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:30,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 35 [2023-02-18 21:01:30,310 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 37 treesize of output 13 [2023-02-18 21:01:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:30,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 21:01:30,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049194854] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:30,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 21:01:30,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13] total 27 [2023-02-18 21:01:30,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756568339] [2023-02-18 21:01:30,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:30,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 21:01:30,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:30,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 21:01:30,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2023-02-18 21:01:30,341 INFO L87 Difference]: Start difference. First operand 10608 states and 14533 transitions. Second operand has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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) [2023-02-18 21:01:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:31,211 INFO L93 Difference]: Finished difference Result 12252 states and 16982 transitions. [2023-02-18 21:01:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 21:01:31,212 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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 65 [2023-02-18 21:01:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:31,225 INFO L225 Difference]: With dead ends: 12252 [2023-02-18 21:01:31,226 INFO L226 Difference]: Without dead ends: 12252 [2023-02-18 21:01:31,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=306, Invalid=1334, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 21:01:31,227 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 1051 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:31,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1051 Valid, 1782 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 21:01:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12252 states. [2023-02-18 21:01:31,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12252 to 10827. [2023-02-18 21:01:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10827 states, 10366 states have (on average 1.361084314103801) internal successors, (14109), 10541 states have internal predecessors, (14109), 404 states have call successors, (404), 25 states have call predecessors, (404), 25 states have return successors, (404), 260 states have call predecessors, (404), 404 states have call successors, (404) [2023-02-18 21:01:31,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10827 states to 10827 states and 14917 transitions. [2023-02-18 21:01:31,331 INFO L78 Accepts]: Start accepts. Automaton has 10827 states and 14917 transitions. Word has length 65 [2023-02-18 21:01:31,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:31,331 INFO L495 AbstractCegarLoop]: Abstraction has 10827 states and 14917 transitions. [2023-02-18 21:01:31,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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) [2023-02-18 21:01:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 10827 states and 14917 transitions. [2023-02-18 21:01:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-18 21:01:31,332 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:31,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:31,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 21:01:31,541 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,SelfDestructingSolverStorable66 [2023-02-18 21:01:31,541 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:31,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1485673093, now seen corresponding path program 1 times [2023-02-18 21:01:31,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:31,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149372769] [2023-02-18 21:01:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:31,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:31,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:31,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:01:31,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149372769] [2023-02-18 21:01:31,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149372769] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:31,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:31,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 21:01:31,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121044933] [2023-02-18 21:01:31,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:31,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 21:01:31,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:31,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 21:01:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:01:31,970 INFO L87 Difference]: Start difference. First operand 10827 states and 14917 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:32,417 INFO L93 Difference]: Finished difference Result 12111 states and 16427 transitions. [2023-02-18 21:01:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 21:01:32,420 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 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 65 [2023-02-18 21:01:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:32,433 INFO L225 Difference]: With dead ends: 12111 [2023-02-18 21:01:32,433 INFO L226 Difference]: Without dead ends: 12111 [2023-02-18 21:01:32,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2023-02-18 21:01:32,434 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 685 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:32,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 1162 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 21:01:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12111 states. [2023-02-18 21:01:32,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12111 to 10792. [2023-02-18 21:01:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10792 states, 10331 states have (on average 1.3553383021972703) internal successors, (14002), 10506 states have internal predecessors, (14002), 404 states have call successors, (404), 25 states have call predecessors, (404), 25 states have return successors, (404), 260 states have call predecessors, (404), 404 states have call successors, (404) [2023-02-18 21:01:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10792 states to 10792 states and 14810 transitions. [2023-02-18 21:01:32,525 INFO L78 Accepts]: Start accepts. Automaton has 10792 states and 14810 transitions. Word has length 65 [2023-02-18 21:01:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:32,525 INFO L495 AbstractCegarLoop]: Abstraction has 10792 states and 14810 transitions. [2023-02-18 21:01:32,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 10792 states and 14810 transitions. [2023-02-18 21:01:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-18 21:01:32,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:32,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:32,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2023-02-18 21:01:32,527 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:32,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:32,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1484965091, now seen corresponding path program 1 times [2023-02-18 21:01:32,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:32,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082393075] [2023-02-18 21:01:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:32,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:32,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:32,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:01:32,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:32,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082393075] [2023-02-18 21:01:32,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082393075] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:32,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:32,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 21:01:32,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950878094] [2023-02-18 21:01:32,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:32,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 21:01:32,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:32,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 21:01:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 21:01:32,775 INFO L87 Difference]: Start difference. First operand 10792 states and 14810 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:33,270 INFO L93 Difference]: Finished difference Result 11688 states and 15870 transitions. [2023-02-18 21:01:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 21:01:33,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 11 states have internal predecessors, (59), 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 65 [2023-02-18 21:01:33,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:33,282 INFO L225 Difference]: With dead ends: 11688 [2023-02-18 21:01:33,282 INFO L226 Difference]: Without dead ends: 11688 [2023-02-18 21:01:33,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2023-02-18 21:01:33,283 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 1095 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:33,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 884 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 21:01:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11688 states. [2023-02-18 21:01:33,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11688 to 10792. [2023-02-18 21:01:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10792 states, 10331 states have (on average 1.3509824799148196) internal successors, (13957), 10506 states have internal predecessors, (13957), 404 states have call successors, (404), 25 states have call predecessors, (404), 25 states have return successors, (404), 260 states have call predecessors, (404), 404 states have call successors, (404) [2023-02-18 21:01:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10792 states to 10792 states and 14765 transitions. [2023-02-18 21:01:33,368 INFO L78 Accepts]: Start accepts. Automaton has 10792 states and 14765 transitions. Word has length 65 [2023-02-18 21:01:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:33,369 INFO L495 AbstractCegarLoop]: Abstraction has 10792 states and 14765 transitions. [2023-02-18 21:01:33,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 10792 states and 14765 transitions. [2023-02-18 21:01:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-18 21:01:33,370 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:33,370 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:33,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2023-02-18 21:01:33,370 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:33,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:33,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1210722175, now seen corresponding path program 1 times [2023-02-18 21:01:33,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:33,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893246976] [2023-02-18 21:01:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:33,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:33,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:33,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:01:33,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:33,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893246976] [2023-02-18 21:01:33,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893246976] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:33,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:33,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-18 21:01:33,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633558750] [2023-02-18 21:01:33,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:33,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 21:01:33,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:33,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 21:01:33,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-02-18 21:01:33,662 INFO L87 Difference]: Start difference. First operand 10792 states and 14765 transitions. Second operand has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:34,462 INFO L93 Difference]: Finished difference Result 13006 states and 17822 transitions. [2023-02-18 21:01:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 21:01:34,462 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 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 66 [2023-02-18 21:01:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:34,477 INFO L225 Difference]: With dead ends: 13006 [2023-02-18 21:01:34,477 INFO L226 Difference]: Without dead ends: 13006 [2023-02-18 21:01:34,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2023-02-18 21:01:34,478 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 968 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:34,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 1683 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 21:01:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13006 states. [2023-02-18 21:01:34,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13006 to 10990. [2023-02-18 21:01:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10990 states, 10529 states have (on average 1.3537847848798557) internal successors, (14254), 10704 states have internal predecessors, (14254), 404 states have call successors, (404), 25 states have call predecessors, (404), 25 states have return successors, (404), 260 states have call predecessors, (404), 404 states have call successors, (404) [2023-02-18 21:01:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10990 states to 10990 states and 15062 transitions. [2023-02-18 21:01:34,573 INFO L78 Accepts]: Start accepts. Automaton has 10990 states and 15062 transitions. Word has length 66 [2023-02-18 21:01:34,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:34,573 INFO L495 AbstractCegarLoop]: Abstraction has 10990 states and 15062 transitions. [2023-02-18 21:01:34,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:34,573 INFO L276 IsEmpty]: Start isEmpty. Operand 10990 states and 15062 transitions. [2023-02-18 21:01:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 21:01:34,574 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:34,574 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:34,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2023-02-18 21:01:34,574 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:34,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:34,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1122318501, now seen corresponding path program 1 times [2023-02-18 21:01:34,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:34,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699515570] [2023-02-18 21:01:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:34,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:34,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:34,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:01:34,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:34,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699515570] [2023-02-18 21:01:34,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699515570] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:34,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286272219] [2023-02-18 21:01:34,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:34,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:34,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:01:34,933 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) [2023-02-18 21:01:34,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 21:01:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:35,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-18 21:01:35,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:01:35,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:01:35,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-18 21:01:35,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 21:01:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:35,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:35,278 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:35,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 34 [2023-02-18 21:01:35,332 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 36 treesize of output 12 [2023-02-18 21:01:35,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-18 21:01:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:35,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 21:01:35,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286272219] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:35,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 21:01:35,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 26 [2023-02-18 21:01:35,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680388355] [2023-02-18 21:01:35,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:35,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 21:01:35,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:35,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 21:01:35,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2023-02-18 21:01:35,409 INFO L87 Difference]: Start difference. First operand 10990 states and 15062 transitions. Second operand has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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) [2023-02-18 21:01:36,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:36,834 INFO L93 Difference]: Finished difference Result 23785 states and 32747 transitions. [2023-02-18 21:01:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 21:01:36,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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 67 [2023-02-18 21:01:36,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:36,867 INFO L225 Difference]: With dead ends: 23785 [2023-02-18 21:01:36,867 INFO L226 Difference]: Without dead ends: 23785 [2023-02-18 21:01:36,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=813, Invalid=2969, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 21:01:36,868 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 1847 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1847 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:36,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1847 Valid, 2168 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 21:01:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23785 states. [2023-02-18 21:01:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23785 to 17836. [2023-02-18 21:01:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17836 states, 17083 states have (on average 1.3420944798922905) internal successors, (22927), 17350 states have internal predecessors, (22927), 676 states have call successors, (676), 45 states have call predecessors, (676), 45 states have return successors, (676), 440 states have call predecessors, (676), 676 states have call successors, (676) [2023-02-18 21:01:37,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17836 states to 17836 states and 24279 transitions. [2023-02-18 21:01:37,046 INFO L78 Accepts]: Start accepts. Automaton has 17836 states and 24279 transitions. Word has length 67 [2023-02-18 21:01:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:37,046 INFO L495 AbstractCegarLoop]: Abstraction has 17836 states and 24279 transitions. [2023-02-18 21:01:37,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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) [2023-02-18 21:01:37,046 INFO L276 IsEmpty]: Start isEmpty. Operand 17836 states and 24279 transitions. [2023-02-18 21:01:37,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 21:01:37,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:37,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:37,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 21:01:37,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:37,254 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:37,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1714217293, now seen corresponding path program 1 times [2023-02-18 21:01:37,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:37,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349235632] [2023-02-18 21:01:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:37,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:39,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:39,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 21:01:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:01:39,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:39,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349235632] [2023-02-18 21:01:39,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349235632] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:39,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982550999] [2023-02-18 21:01:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:39,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:39,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:01:39,120 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) [2023-02-18 21:01:39,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 21:01:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:39,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 118 conjunts are in the unsatisfiable core [2023-02-18 21:01:39,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:01:39,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:01:39,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-18 21:01:39,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 21:01:39,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 21:01:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:39,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-18 21:01:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:39,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-18 21:01:39,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:39,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-18 21:01:39,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:39,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-18 21:01:39,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:39,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-18 21:01:39,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:39,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-18 21:01:39,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:39,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-18 21:01:39,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:39,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2023-02-18 21:01:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:39,844 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:39,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:01:39,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 75 [2023-02-18 21:01:39,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:39,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 48 [2023-02-18 21:01:40,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:40,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:40,348 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:40,358 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:40,358 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:40,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:01:40,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 141 treesize of output 79 [2023-02-18 21:01:40,362 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:40,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:01:40,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-02-18 21:01:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:01:40,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:01:40,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982550999] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:40,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 21:01:40,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 47 [2023-02-18 21:01:40,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350859054] [2023-02-18 21:01:40,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 21:01:40,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 21:01:40,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 21:01:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2581, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 21:01:40,988 INFO L87 Difference]: Start difference. First operand 17836 states and 24279 transitions. Second operand has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 45 states have internal predecessors, (114), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 21:01:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:48,471 INFO L93 Difference]: Finished difference Result 44104 states and 60461 transitions. [2023-02-18 21:01:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-18 21:01:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 45 states have internal predecessors, (114), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 67 [2023-02-18 21:01:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:48,531 INFO L225 Difference]: With dead ends: 44104 [2023-02-18 21:01:48,531 INFO L226 Difference]: Without dead ends: 44104 [2023-02-18 21:01:48,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 59 SyntacticMatches, 12 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1762, Invalid=13244, Unknown=0, NotChecked=0, Total=15006 [2023-02-18 21:01:48,533 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 7879 mSDsluCounter, 5432 mSDsCounter, 0 mSdLazyCounter, 4802 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7880 SdHoareTripleChecker+Valid, 5597 SdHoareTripleChecker+Invalid, 5189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 4802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:48,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7880 Valid, 5597 Invalid, 5189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 4802 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-02-18 21:01:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44104 states. [2023-02-18 21:01:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44104 to 29247. [2023-02-18 21:01:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29247 states, 27986 states have (on average 1.335775030372329) internal successors, (37383), 28399 states have internal predecessors, (37383), 1150 states have call successors, (1150), 79 states have call predecessors, (1150), 79 states have return successors, (1150), 768 states have call predecessors, (1150), 1150 states have call successors, (1150) [2023-02-18 21:01:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29247 states to 29247 states and 39683 transitions. [2023-02-18 21:01:48,991 INFO L78 Accepts]: Start accepts. Automaton has 29247 states and 39683 transitions. Word has length 67 [2023-02-18 21:01:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:48,991 INFO L495 AbstractCegarLoop]: Abstraction has 29247 states and 39683 transitions. [2023-02-18 21:01:48,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 45 states have internal predecessors, (114), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 21:01:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 29247 states and 39683 transitions. [2023-02-18 21:01:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 21:01:48,992 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:48,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:48,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 21:01:49,198 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,SelfDestructingSolverStorable71 [2023-02-18 21:01:49,198 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:49,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:49,199 INFO L85 PathProgramCache]: Analyzing trace with hash 432135427, now seen corresponding path program 1 times [2023-02-18 21:01:49,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:49,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747800476] [2023-02-18 21:01:49,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:49,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:49,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:49,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:01:49,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:49,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747800476] [2023-02-18 21:01:49,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747800476] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:49,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:49,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 21:01:49,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470994776] [2023-02-18 21:01:49,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:49,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:01:49,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:01:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:01:49,340 INFO L87 Difference]: Start difference. First operand 29247 states and 39683 transitions. Second operand has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:49,666 INFO L93 Difference]: Finished difference Result 41372 states and 56167 transitions. [2023-02-18 21:01:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 21:01:49,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 8 states have internal predecessors, (62), 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 68 [2023-02-18 21:01:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:49,724 INFO L225 Difference]: With dead ends: 41372 [2023-02-18 21:01:49,725 INFO L226 Difference]: Without dead ends: 41372 [2023-02-18 21:01:49,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-18 21:01:49,727 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 682 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:49,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 567 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:01:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41372 states. [2023-02-18 21:01:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41372 to 29246. [2023-02-18 21:01:50,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29246 states, 27986 states have (on average 1.3270206531837347) internal successors, (37138), 28398 states have internal predecessors, (37138), 1150 states have call successors, (1150), 79 states have call predecessors, (1150), 79 states have return successors, (1150), 768 states have call predecessors, (1150), 1150 states have call successors, (1150) [2023-02-18 21:01:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29246 states to 29246 states and 39438 transitions. [2023-02-18 21:01:50,103 INFO L78 Accepts]: Start accepts. Automaton has 29246 states and 39438 transitions. Word has length 68 [2023-02-18 21:01:50,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:50,103 INFO L495 AbstractCegarLoop]: Abstraction has 29246 states and 39438 transitions. [2023-02-18 21:01:50,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:50,104 INFO L276 IsEmpty]: Start isEmpty. Operand 29246 states and 39438 transitions. [2023-02-18 21:01:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 21:01:50,105 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:50,105 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:50,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2023-02-18 21:01:50,105 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:50,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:50,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2031100329, now seen corresponding path program 1 times [2023-02-18 21:01:50,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:50,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789532201] [2023-02-18 21:01:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:50,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:50,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:50,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 21:01:50,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:50,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789532201] [2023-02-18 21:01:50,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789532201] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:50,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754928744] [2023-02-18 21:01:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:50,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:50,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:01:50,156 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) [2023-02-18 21:01:50,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 21:01:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:50,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 21:01:50,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:01:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 21:01:50,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:01:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 21:01:50,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754928744] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:01:50,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:01:50,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-18 21:01:50,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615700673] [2023-02-18 21:01:50,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:01:50,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:01:50,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:50,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:01:50,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:01:50,347 INFO L87 Difference]: Start difference. First operand 29246 states and 39438 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 21:01:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:50,488 INFO L93 Difference]: Finished difference Result 58383 states and 80553 transitions. [2023-02-18 21:01:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 21:01:50,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2023-02-18 21:01:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:50,583 INFO L225 Difference]: With dead ends: 58383 [2023-02-18 21:01:50,583 INFO L226 Difference]: Without dead ends: 58383 [2023-02-18 21:01:50,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-02-18 21:01:50,583 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 369 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:50,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 683 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:01:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58383 states. [2023-02-18 21:01:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58383 to 49915. [2023-02-18 21:01:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49915 states, 47726 states have (on average 1.355131374931903) internal successors, (64675), 48138 states have internal predecessors, (64675), 2079 states have call successors, (2079), 79 states have call predecessors, (2079), 79 states have return successors, (2079), 1697 states have call predecessors, (2079), 2079 states have call successors, (2079) [2023-02-18 21:01:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49915 states to 49915 states and 68833 transitions. [2023-02-18 21:01:51,323 INFO L78 Accepts]: Start accepts. Automaton has 49915 states and 68833 transitions. Word has length 75 [2023-02-18 21:01:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:51,323 INFO L495 AbstractCegarLoop]: Abstraction has 49915 states and 68833 transitions. [2023-02-18 21:01:51,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 21:01:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 49915 states and 68833 transitions. [2023-02-18 21:01:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 21:01:51,326 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:51,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:51,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-18 21:01:51,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:51,533 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:51,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1444294315, now seen corresponding path program 1 times [2023-02-18 21:01:51,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:51,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836915182] [2023-02-18 21:01:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:51,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:51,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:51,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:01:51,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:51,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836915182] [2023-02-18 21:01:51,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836915182] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:51,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:51,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-18 21:01:51,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424039011] [2023-02-18 21:01:51,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:51,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 21:01:51,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:51,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 21:01:51,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-02-18 21:01:51,917 INFO L87 Difference]: Start difference. First operand 49915 states and 68833 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:52,970 INFO L93 Difference]: Finished difference Result 63611 states and 86461 transitions. [2023-02-18 21:01:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 21:01:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 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 75 [2023-02-18 21:01:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:53,068 INFO L225 Difference]: With dead ends: 63611 [2023-02-18 21:01:53,068 INFO L226 Difference]: Without dead ends: 63611 [2023-02-18 21:01:53,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 21:01:53,072 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 1899 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 2271 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:53,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1899 Valid, 2271 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 21:01:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63611 states. [2023-02-18 21:01:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63611 to 40666. [2023-02-18 21:01:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40666 states, 38919 states have (on average 1.3575117551838434) internal successors, (52833), 39339 states have internal predecessors, (52833), 1637 states have call successors, (1637), 79 states have call predecessors, (1637), 79 states have return successors, (1637), 1247 states have call predecessors, (1637), 1637 states have call successors, (1637) [2023-02-18 21:01:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40666 states to 40666 states and 56107 transitions. [2023-02-18 21:01:53,599 INFO L78 Accepts]: Start accepts. Automaton has 40666 states and 56107 transitions. Word has length 75 [2023-02-18 21:01:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:53,599 INFO L495 AbstractCegarLoop]: Abstraction has 40666 states and 56107 transitions. [2023-02-18 21:01:53,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 21:01:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 40666 states and 56107 transitions. [2023-02-18 21:01:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-18 21:01:53,601 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:53,601 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:53,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2023-02-18 21:01:53,601 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:53,602 INFO L85 PathProgramCache]: Analyzing trace with hash 815319307, now seen corresponding path program 1 times [2023-02-18 21:01:53,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:53,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029319022] [2023-02-18 21:01:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:53,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:53,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:53,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:53,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-02-18 21:01:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 21:01:53,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:53,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029319022] [2023-02-18 21:01:53,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029319022] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:53,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401753954] [2023-02-18 21:01:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:53,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:53,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:01:53,841 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) [2023-02-18 21:01:53,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 21:01:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:54,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 21:01:54,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:01:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 21:01:54,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:01:54,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:01:54,056 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 16 [2023-02-18 21:01:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 21:01:54,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401753954] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:01:54,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:01:54,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-02-18 21:01:54,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846172848] [2023-02-18 21:01:54,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:01:54,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 21:01:54,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:54,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 21:01:54,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-02-18 21:01:54,062 INFO L87 Difference]: Start difference. First operand 40666 states and 56107 transitions. Second operand has 12 states, 11 states have (on average 13.090909090909092) internal successors, (144), 12 states have internal predecessors, (144), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 21:01:54,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:54,609 INFO L93 Difference]: Finished difference Result 98441 states and 131510 transitions. [2023-02-18 21:01:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 21:01:54,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 13.090909090909092) internal successors, (144), 12 states have internal predecessors, (144), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 81 [2023-02-18 21:01:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:54,779 INFO L225 Difference]: With dead ends: 98441 [2023-02-18 21:01:54,780 INFO L226 Difference]: Without dead ends: 98441 [2023-02-18 21:01:54,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-02-18 21:01:54,780 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 2896 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2898 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:54,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2898 Valid, 960 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 21:01:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98441 states. [2023-02-18 21:01:55,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98441 to 50485. [2023-02-18 21:01:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50485 states, 48142 states have (on average 1.282019857920319) internal successors, (61719), 48709 states have internal predecessors, (61719), 2210 states have call successors, (2210), 108 states have call predecessors, (2210), 108 states have return successors, (2210), 1667 states have call predecessors, (2210), 2210 states have call successors, (2210) [2023-02-18 21:01:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50485 states to 50485 states and 66139 transitions. [2023-02-18 21:01:55,546 INFO L78 Accepts]: Start accepts. Automaton has 50485 states and 66139 transitions. Word has length 81 [2023-02-18 21:01:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:55,546 INFO L495 AbstractCegarLoop]: Abstraction has 50485 states and 66139 transitions. [2023-02-18 21:01:55,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 13.090909090909092) internal successors, (144), 12 states have internal predecessors, (144), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 21:01:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 50485 states and 66139 transitions. [2023-02-18 21:01:55,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-18 21:01:55,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:55,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:55,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 21:01:55,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:55,752 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:55,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1833977665, now seen corresponding path program 1 times [2023-02-18 21:01:55,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:55,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914288304] [2023-02-18 21:01:55,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:55,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:55,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:55,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 21:01:55,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:55,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914288304] [2023-02-18 21:01:55,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914288304] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:01:55,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:01:55,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:01:55,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306063333] [2023-02-18 21:01:55,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:01:55,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:01:55,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:01:55,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:01:55,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:01:55,870 INFO L87 Difference]: Start difference. First operand 50485 states and 66139 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 21:01:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:01:55,945 INFO L93 Difference]: Finished difference Result 38857 states and 51872 transitions. [2023-02-18 21:01:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:01:55,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 86 [2023-02-18 21:01:55,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:01:55,997 INFO L225 Difference]: With dead ends: 38857 [2023-02-18 21:01:55,997 INFO L226 Difference]: Without dead ends: 38857 [2023-02-18 21:01:55,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:01:55,998 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 135 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:01:55,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 518 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:01:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38857 states. [2023-02-18 21:01:56,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38857 to 28277. [2023-02-18 21:01:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28277 states, 26970 states have (on average 1.2884686688913607) internal successors, (34750), 27293 states have internal predecessors, (34750), 1225 states have call successors, (1225), 57 states have call predecessors, (1225), 57 states have return successors, (1225), 926 states have call predecessors, (1225), 1225 states have call successors, (1225) [2023-02-18 21:01:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28277 states to 28277 states and 37200 transitions. [2023-02-18 21:01:56,690 INFO L78 Accepts]: Start accepts. Automaton has 28277 states and 37200 transitions. Word has length 86 [2023-02-18 21:01:56,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:01:56,690 INFO L495 AbstractCegarLoop]: Abstraction has 28277 states and 37200 transitions. [2023-02-18 21:01:56,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 21:01:56,690 INFO L276 IsEmpty]: Start isEmpty. Operand 28277 states and 37200 transitions. [2023-02-18 21:01:56,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 21:01:56,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:01:56,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:01:56,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2023-02-18 21:01:56,693 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:01:56,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:01:56,693 INFO L85 PathProgramCache]: Analyzing trace with hash 666817189, now seen corresponding path program 1 times [2023-02-18 21:01:56,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:01:56,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085762123] [2023-02-18 21:01:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:56,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:01:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:56,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:01:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:56,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:01:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 21:01:56,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:01:56,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085762123] [2023-02-18 21:01:56,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085762123] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:01:56,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527351278] [2023-02-18 21:01:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:01:56,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:01:56,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:01:56,823 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) [2023-02-18 21:01:56,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 21:01:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:01:57,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-18 21:01:57,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:01:57,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 21:01:57,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:57,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:01:57,321 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:57,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2023-02-18 21:01:57,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2023-02-18 21:01:57,370 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 51 treesize of output 19 [2023-02-18 21:01:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:01:57,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:01:57,456 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2501 Int)) (= (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* 4 ~unnamed1~0~LIST_END)) v_ArrVal_2501)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* 4 ~unnamed1~0~LIST_BEG))) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2023-02-18 21:01:57,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:01:57,497 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 169 treesize of output 173 [2023-02-18 21:01:57,504 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:57,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-02-18 21:01:57,510 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:01:57,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:01:57,513 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 93 treesize of output 97 [2023-02-18 21:02:09,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527351278] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:02:09,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 21:02:09,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14] total 19 [2023-02-18 21:02:09,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799909411] [2023-02-18 21:02:09,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 21:02:09,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 21:02:09,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:02:09,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 21:02:09,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=4, NotChecked=56, Total=930 [2023-02-18 21:02:09,167 INFO L87 Difference]: Start difference. First operand 28277 states and 37200 transitions. Second operand has 19 states, 19 states have (on average 8.526315789473685) internal successors, (162), 19 states have internal predecessors, (162), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 21:02:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:02:11,606 INFO L93 Difference]: Finished difference Result 37751 states and 49962 transitions. [2023-02-18 21:02:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 21:02:11,606 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.526315789473685) internal successors, (162), 19 states have internal predecessors, (162), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 87 [2023-02-18 21:02:11,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:02:11,655 INFO L225 Difference]: With dead ends: 37751 [2023-02-18 21:02:11,656 INFO L226 Difference]: Without dead ends: 37744 [2023-02-18 21:02:11,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=625, Invalid=2455, Unknown=4, NotChecked=108, Total=3192 [2023-02-18 21:02:11,657 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1519 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 75 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 3719 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 21:02:11,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 3719 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2145 Invalid, 1 Unknown, 0 Unchecked, 1.6s Time] [2023-02-18 21:02:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37744 states. [2023-02-18 21:02:11,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37744 to 29341. [2023-02-18 21:02:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29341 states, 27986 states have (on average 1.2860001429286072) internal successors, (35990), 28323 states have internal predecessors, (35990), 1269 states have call successors, (1269), 61 states have call predecessors, (1269), 61 states have return successors, (1269), 956 states have call predecessors, (1269), 1269 states have call successors, (1269) [2023-02-18 21:02:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29341 states to 29341 states and 38528 transitions. [2023-02-18 21:02:12,111 INFO L78 Accepts]: Start accepts. Automaton has 29341 states and 38528 transitions. Word has length 87 [2023-02-18 21:02:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:02:12,111 INFO L495 AbstractCegarLoop]: Abstraction has 29341 states and 38528 transitions. [2023-02-18 21:02:12,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.526315789473685) internal successors, (162), 19 states have internal predecessors, (162), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 21:02:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand 29341 states and 38528 transitions. [2023-02-18 21:02:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-18 21:02:12,113 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:02:12,113 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:02:12,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 21:02:12,320 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,SelfDestructingSolverStorable77 [2023-02-18 21:02:12,320 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:02:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:02:12,321 INFO L85 PathProgramCache]: Analyzing trace with hash 439443375, now seen corresponding path program 1 times [2023-02-18 21:02:12,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:02:12,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577239773] [2023-02-18 21:02:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:02:12,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:02:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:12,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:02:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:12,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:02:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:12,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-02-18 21:02:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 21:02:12,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:02:12,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577239773] [2023-02-18 21:02:12,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577239773] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:02:12,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64745896] [2023-02-18 21:02:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:02:12,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:02:12,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:02:12,418 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) [2023-02-18 21:02:12,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 21:02:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:12,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 21:02:12,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:02:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 21:02:12,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:02:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 21:02:12,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64745896] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:02:12,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:02:12,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-18 21:02:12,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099427863] [2023-02-18 21:02:12,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:02:12,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 21:02:12,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:02:12,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 21:02:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2023-02-18 21:02:12,676 INFO L87 Difference]: Start difference. First operand 29341 states and 38528 transitions. Second operand has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 21:02:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:02:12,795 INFO L93 Difference]: Finished difference Result 36239 states and 47784 transitions. [2023-02-18 21:02:12,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 21:02:12,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 89 [2023-02-18 21:02:12,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:02:12,841 INFO L225 Difference]: With dead ends: 36239 [2023-02-18 21:02:12,841 INFO L226 Difference]: Without dead ends: 36239 [2023-02-18 21:02:12,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2023-02-18 21:02:12,842 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 276 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:02:12,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 1349 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:02:12,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36239 states. [2023-02-18 21:02:13,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36239 to 29801. [2023-02-18 21:02:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29801 states, 28446 states have (on average 1.2813752372917107) internal successors, (36450), 28783 states have internal predecessors, (36450), 1269 states have call successors, (1269), 61 states have call predecessors, (1269), 61 states have return successors, (1269), 956 states have call predecessors, (1269), 1269 states have call successors, (1269) [2023-02-18 21:02:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29801 states to 29801 states and 38988 transitions. [2023-02-18 21:02:13,162 INFO L78 Accepts]: Start accepts. Automaton has 29801 states and 38988 transitions. Word has length 89 [2023-02-18 21:02:13,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:02:13,162 INFO L495 AbstractCegarLoop]: Abstraction has 29801 states and 38988 transitions. [2023-02-18 21:02:13,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 21:02:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand 29801 states and 38988 transitions. [2023-02-18 21:02:13,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-18 21:02:13,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:02:13,165 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2023-02-18 21:02:13,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 21:02:13,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:02:13,371 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:02:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:02:13,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1446290869, now seen corresponding path program 1 times [2023-02-18 21:02:13,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:02:13,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486655320] [2023-02-18 21:02:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:02:13,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:02:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:14,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:02:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:14,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 21:02:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 21:02:14,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:02:14,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486655320] [2023-02-18 21:02:14,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486655320] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:02:14,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202554736] [2023-02-18 21:02:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:02:14,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:02:14,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:02:14,115 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 21:02:14,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 21:02:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:14,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 21:02:14,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:02:14,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 21:02:14,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:02:14,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-02-18 21:02:14,553 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 24 treesize of output 8 [2023-02-18 21:02:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:02:14,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:02:14,731 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 126 treesize of output 118 [2023-02-18 21:02:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:02:14,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202554736] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:02:14,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:02:14,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 39 [2023-02-18 21:02:14,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178631027] [2023-02-18 21:02:14,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:02:14,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 21:02:14,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:02:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 21:02:14,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 21:02:14,871 INFO L87 Difference]: Start difference. First operand 29801 states and 38988 transitions. Second operand has 39 states, 39 states have (on average 4.717948717948718) internal successors, (184), 35 states have internal predecessors, (184), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 21:02:16,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:02:16,351 INFO L93 Difference]: Finished difference Result 39842 states and 52510 transitions. [2023-02-18 21:02:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 21:02:16,352 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.717948717948718) internal successors, (184), 35 states have internal predecessors, (184), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 90 [2023-02-18 21:02:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:02:16,404 INFO L225 Difference]: With dead ends: 39842 [2023-02-18 21:02:16,405 INFO L226 Difference]: Without dead ends: 39842 [2023-02-18 21:02:16,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 166 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=796, Invalid=3896, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 21:02:16,406 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 5677 mSDsluCounter, 2453 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5678 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 21:02:16,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5678 Valid, 2622 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 21:02:16,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39842 states. [2023-02-18 21:02:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39842 to 29781. [2023-02-18 21:02:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29781 states, 28426 states have (on average 1.2790403152043903) internal successors, (36358), 28763 states have internal predecessors, (36358), 1269 states have call successors, (1269), 61 states have call predecessors, (1269), 61 states have return successors, (1269), 956 states have call predecessors, (1269), 1269 states have call successors, (1269) [2023-02-18 21:02:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29781 states to 29781 states and 38896 transitions. [2023-02-18 21:02:16,748 INFO L78 Accepts]: Start accepts. Automaton has 29781 states and 38896 transitions. Word has length 90 [2023-02-18 21:02:16,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:02:16,748 INFO L495 AbstractCegarLoop]: Abstraction has 29781 states and 38896 transitions. [2023-02-18 21:02:16,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.717948717948718) internal successors, (184), 35 states have internal predecessors, (184), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 21:02:16,749 INFO L276 IsEmpty]: Start isEmpty. Operand 29781 states and 38896 transitions. [2023-02-18 21:02:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-18 21:02:16,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:02:16,751 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:02:16,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 21:02:16,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:02:16,958 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 21:02:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:02:16,958 INFO L85 PathProgramCache]: Analyzing trace with hash -479156689, now seen corresponding path program 2 times [2023-02-18 21:02:16,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:02:16,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444620173] [2023-02-18 21:02:16,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:02:16,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:02:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:17,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 21:02:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:17,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 21:02:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:17,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-18 21:02:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:02:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 21:02:17,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:02:17,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444620173] [2023-02-18 21:02:17,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444620173] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:02:17,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412652029] [2023-02-18 21:02:17,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 21:02:17,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:02:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:02:17,145 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 21:02:17,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 21:02:17,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 21:02:17,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:02:17,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-18 21:02:17,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:02:17,438 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 [2023-02-18 21:02:17,441 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 17 treesize of output 13 [2023-02-18 21:02:17,459 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 27 treesize of output 26 [2023-02-18 21:02:17,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-18 21:02:17,477 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 27 treesize of output 26 [2023-02-18 21:02:17,480 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 29 treesize of output 28 [2023-02-18 21:02:17,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:02:17,498 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 27 treesize of output 26 [2023-02-18 21:02:17,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:02:17,517 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 29 treesize of output 28 [2023-02-18 21:02:17,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-18 21:02:17,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 29 [2023-02-18 21:02:17,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:02:17,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:02:17,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2023-02-18 21:02:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:02:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:02:17,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2023-02-18 21:02:17,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:02:17,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:02:17,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:02:17,775 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 88 treesize of output 94 [2023-02-18 21:02:17,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:02:17,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:02:17,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:02:17,781 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 93 treesize of output 83 [2023-02-18 21:02:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 21:02:18,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:02:46,546 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:02:46,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 12398756 treesize of output 12349220 [2023-02-18 21:02:46,792 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 46322238 treesize of output 46125630