./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/heap-manipulation/merge_sort-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a31fd051 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/heap-manipulation/merge_sort-2.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 e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 13:12:40,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 13:12:40,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 13:12:40,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 13:12:40,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 13:12:40,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 13:12:40,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 13:12:40,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 13:12:40,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 13:12:40,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 13:12:40,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 13:12:40,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 13:12:40,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 13:12:40,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 13:12:40,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 13:12:40,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 13:12:40,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 13:12:40,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 13:12:40,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 13:12:40,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 13:12:40,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 13:12:40,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 13:12:40,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 13:12:40,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 13:12:40,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 13:12:40,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 13:12:40,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 13:12:40,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 13:12:40,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 13:12:40,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 13:12:40,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 13:12:40,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 13:12:40,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 13:12:40,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 13:12:40,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 13:12:40,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 13:12:40,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 13:12:40,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 13:12:40,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 13:12:40,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 13:12:40,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 13:12:40,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 13:12:40,337 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 13:12:40,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 13:12:40,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 13:12:40,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 13:12:40,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 13:12:40,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 13:12:40,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 13:12:40,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 13:12:40,339 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 13:12:40,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 13:12:40,340 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 13:12:40,341 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 13:12:40,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 13:12:40,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 13:12:40,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 13:12:40,341 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 13:12:40,341 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 13:12:40,341 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 13:12:40,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 13:12:40,342 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 13:12:40,342 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 13:12:40,342 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 13:12:40,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 13:12:40,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 13:12:40,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 13:12:40,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 13:12:40,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 13:12:40,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 13:12:40,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 13:12:40,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 13:12:40,343 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 13:12:40,343 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 13:12:40,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 13:12:40,344 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 13:12:40,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2023-02-15 13:12:40,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 13:12:40,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 13:12:40,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 13:12:40,560 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 13:12:40,561 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 13:12:40,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-02-15 13:12:41,649 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 13:12:41,888 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 13:12:41,892 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-02-15 13:12:41,904 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/474fa836c/ae0b2647f4f54c39b493d08e46467781/FLAG4f14796b8 [2023-02-15 13:12:41,913 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/474fa836c/ae0b2647f4f54c39b493d08e46467781 [2023-02-15 13:12:41,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 13:12:41,916 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 13:12:41,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 13:12:41,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 13:12:41,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 13:12:41,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:12:41" (1/1) ... [2023-02-15 13:12:41,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e2a5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:41, skipping insertion in model container [2023-02-15 13:12:41,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:12:41" (1/1) ... [2023-02-15 13:12:41,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 13:12:41,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 13:12:42,158 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2023-02-15 13:12:42,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 13:12:42,207 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 13:12:42,237 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2023-02-15 13:12:42,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 13:12:42,263 INFO L208 MainTranslator]: Completed translation [2023-02-15 13:12:42,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42 WrapperNode [2023-02-15 13:12:42,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 13:12:42,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 13:12:42,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 13:12:42,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 13:12:42,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42" (1/1) ... [2023-02-15 13:12:42,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42" (1/1) ... [2023-02-15 13:12:42,302 INFO L138 Inliner]: procedures = 125, calls = 83, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 294 [2023-02-15 13:12:42,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 13:12:42,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 13:12:42,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 13:12:42,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 13:12:42,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42" (1/1) ... [2023-02-15 13:12:42,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42" (1/1) ... [2023-02-15 13:12:42,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42" (1/1) ... [2023-02-15 13:12:42,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42" (1/1) ... [2023-02-15 13:12:42,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42" (1/1) ... [2023-02-15 13:12:42,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42" (1/1) ... [2023-02-15 13:12:42,353 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42" (1/1) ... [2023-02-15 13:12:42,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42" (1/1) ... [2023-02-15 13:12:42,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 13:12:42,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 13:12:42,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 13:12:42,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 13:12:42,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42" (1/1) ... [2023-02-15 13:12:42,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 13:12:42,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:12:42,391 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 13:12:42,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 13:12:42,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 13:12:42,419 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2023-02-15 13:12:42,419 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2023-02-15 13:12:42,420 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-02-15 13:12:42,420 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-02-15 13:12:42,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 13:12:42,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 13:12:42,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 13:12:42,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 13:12:42,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 13:12:42,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 13:12:42,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 13:12:42,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 13:12:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 13:12:42,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 13:12:42,592 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 13:12:42,593 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 13:12:43,063 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 13:12:43,069 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 13:12:43,069 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2023-02-15 13:12:43,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:12:43 BoogieIcfgContainer [2023-02-15 13:12:43,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 13:12:43,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 13:12:43,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 13:12:43,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 13:12:43,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:12:41" (1/3) ... [2023-02-15 13:12:43,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e726cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:12:43, skipping insertion in model container [2023-02-15 13:12:43,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:42" (2/3) ... [2023-02-15 13:12:43,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e726cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:12:43, skipping insertion in model container [2023-02-15 13:12:43,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:12:43" (3/3) ... [2023-02-15 13:12:43,076 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2023-02-15 13:12:43,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 13:12:43,088 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 105 error locations. [2023-02-15 13:12:43,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 13:12:43,123 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;@d24e3aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 13:12:43,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 105 error locations. [2023-02-15 13:12:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 139 states have (on average 2.194244604316547) internal successors, (305), 259 states have internal predecessors, (305), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-15 13:12:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-15 13:12:43,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:43,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-15 13:12:43,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:43,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash 56404890, now seen corresponding path program 1 times [2023-02-15 13:12:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:43,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041328345] [2023-02-15 13:12:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:43,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:43,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:43,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041328345] [2023-02-15 13:12:43,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041328345] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:43,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:43,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:12:43,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52785571] [2023-02-15 13:12:43,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:43,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 13:12:43,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:43,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 13:12:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 13:12:43,278 INFO L87 Difference]: Start difference. First operand has 262 states, 139 states have (on average 2.194244604316547) internal successors, (305), 259 states have internal predecessors, (305), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:43,324 INFO L93 Difference]: Finished difference Result 260 states and 285 transitions. [2023-02-15 13:12:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 13:12:43,326 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-02-15 13:12:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:43,339 INFO L225 Difference]: With dead ends: 260 [2023-02-15 13:12:43,339 INFO L226 Difference]: Without dead ends: 258 [2023-02-15 13:12:43,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 13:12:43,343 INFO L413 NwaCegarLoop]: 285 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, 285 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:43,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:12:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-15 13:12:43,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2023-02-15 13:12:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 137 states have (on average 1.9416058394160585) internal successors, (266), 255 states have internal predecessors, (266), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 283 transitions. [2023-02-15 13:12:43,380 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 283 transitions. Word has length 5 [2023-02-15 13:12:43,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:43,380 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 283 transitions. [2023-02-15 13:12:43,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 283 transitions. [2023-02-15 13:12:43,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 13:12:43,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:43,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 13:12:43,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 13:12:43,382 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:43,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1747491005, now seen corresponding path program 1 times [2023-02-15 13:12:43,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:43,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889012765] [2023-02-15 13:12:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:43,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:43,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:43,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889012765] [2023-02-15 13:12:43,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889012765] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:43,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:43,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:12:43,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823496706] [2023-02-15 13:12:43,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:43,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:12:43,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:43,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:12:43,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:43,414 INFO L87 Difference]: Start difference. First operand 258 states and 283 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:43,575 INFO L93 Difference]: Finished difference Result 391 states and 435 transitions. [2023-02-15 13:12:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:12:43,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 13:12:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:43,577 INFO L225 Difference]: With dead ends: 391 [2023-02-15 13:12:43,577 INFO L226 Difference]: Without dead ends: 390 [2023-02-15 13:12:43,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:43,579 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 133 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:43,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 396 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-02-15 13:12:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 261. [2023-02-15 13:12:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 140 states have (on average 1.9285714285714286) internal successors, (270), 258 states have internal predecessors, (270), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 287 transitions. [2023-02-15 13:12:43,589 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 287 transitions. Word has length 6 [2023-02-15 13:12:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:43,589 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 287 transitions. [2023-02-15 13:12:43,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 287 transitions. [2023-02-15 13:12:43,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 13:12:43,590 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:43,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 13:12:43,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 13:12:43,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:43,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:43,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1747491563, now seen corresponding path program 1 times [2023-02-15 13:12:43,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:43,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284568227] [2023-02-15 13:12:43,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:43,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:43,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:43,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284568227] [2023-02-15 13:12:43,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284568227] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:43,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:43,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:12:43,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565774122] [2023-02-15 13:12:43,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:43,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:12:43,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:43,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:12:43,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:43,647 INFO L87 Difference]: Start difference. First operand 261 states and 287 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:43,859 INFO L93 Difference]: Finished difference Result 439 states and 489 transitions. [2023-02-15 13:12:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:12:43,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 13:12:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:43,861 INFO L225 Difference]: With dead ends: 439 [2023-02-15 13:12:43,862 INFO L226 Difference]: Without dead ends: 439 [2023-02-15 13:12:43,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:43,866 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 199 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:43,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 569 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:12:43,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-02-15 13:12:43,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 259. [2023-02-15 13:12:43,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 140 states have (on average 1.9142857142857144) internal successors, (268), 256 states have internal predecessors, (268), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:43,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 285 transitions. [2023-02-15 13:12:43,885 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 285 transitions. Word has length 6 [2023-02-15 13:12:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:43,885 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 285 transitions. [2023-02-15 13:12:43,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:43,886 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 285 transitions. [2023-02-15 13:12:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 13:12:43,886 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:43,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 13:12:43,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 13:12:43,887 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:43,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:43,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1747491564, now seen corresponding path program 1 times [2023-02-15 13:12:43,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:43,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847696826] [2023-02-15 13:12:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:43,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:43,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:43,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847696826] [2023-02-15 13:12:43,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847696826] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:43,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:43,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:12:43,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023087681] [2023-02-15 13:12:43,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:43,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:12:43,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:43,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:12:43,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:43,971 INFO L87 Difference]: Start difference. First operand 259 states and 285 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:44,128 INFO L93 Difference]: Finished difference Result 400 states and 444 transitions. [2023-02-15 13:12:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:12:44,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 13:12:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:44,130 INFO L225 Difference]: With dead ends: 400 [2023-02-15 13:12:44,130 INFO L226 Difference]: Without dead ends: 400 [2023-02-15 13:12:44,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:44,131 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 162 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:44,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 560 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-02-15 13:12:44,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 257. [2023-02-15 13:12:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 140 states have (on average 1.9) internal successors, (266), 254 states have internal predecessors, (266), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 283 transitions. [2023-02-15 13:12:44,139 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 283 transitions. Word has length 6 [2023-02-15 13:12:44,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:44,139 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 283 transitions. [2023-02-15 13:12:44,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,140 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 283 transitions. [2023-02-15 13:12:44,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 13:12:44,140 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:44,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:44,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 13:12:44,141 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:44,141 INFO L85 PathProgramCache]: Analyzing trace with hash 6274696, now seen corresponding path program 1 times [2023-02-15 13:12:44,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:44,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626593683] [2023-02-15 13:12:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:44,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:44,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:44,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626593683] [2023-02-15 13:12:44,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626593683] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:44,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:44,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:12:44,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388737517] [2023-02-15 13:12:44,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:44,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:12:44,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:44,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:12:44,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:44,183 INFO L87 Difference]: Start difference. First operand 257 states and 283 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:44,204 INFO L93 Difference]: Finished difference Result 272 states and 296 transitions. [2023-02-15 13:12:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:12:44,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 13:12:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:44,206 INFO L225 Difference]: With dead ends: 272 [2023-02-15 13:12:44,206 INFO L226 Difference]: Without dead ends: 271 [2023-02-15 13:12:44,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:44,207 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 14 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:44,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 537 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:12:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-02-15 13:12:44,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 256. [2023-02-15 13:12:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 139 states have (on average 1.8992805755395683) internal successors, (264), 253 states have internal predecessors, (264), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 281 transitions. [2023-02-15 13:12:44,211 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 281 transitions. Word has length 8 [2023-02-15 13:12:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:44,212 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 281 transitions. [2023-02-15 13:12:44,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 281 transitions. [2023-02-15 13:12:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 13:12:44,212 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:44,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:44,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 13:12:44,213 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash -849555632, now seen corresponding path program 1 times [2023-02-15 13:12:44,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:44,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836190034] [2023-02-15 13:12:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:44,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:44,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:44,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836190034] [2023-02-15 13:12:44,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836190034] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:44,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:44,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:12:44,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218214053] [2023-02-15 13:12:44,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:44,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:12:44,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:44,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:12:44,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:44,309 INFO L87 Difference]: Start difference. First operand 256 states and 281 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:44,434 INFO L93 Difference]: Finished difference Result 342 states and 375 transitions. [2023-02-15 13:12:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:12:44,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 13:12:44,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:44,437 INFO L225 Difference]: With dead ends: 342 [2023-02-15 13:12:44,437 INFO L226 Difference]: Without dead ends: 342 [2023-02-15 13:12:44,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:44,439 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 160 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:44,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 346 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-02-15 13:12:44,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 254. [2023-02-15 13:12:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 139 states have (on average 1.8848920863309353) internal successors, (262), 251 states have internal predecessors, (262), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 279 transitions. [2023-02-15 13:12:44,446 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 279 transitions. Word has length 11 [2023-02-15 13:12:44,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:44,446 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 279 transitions. [2023-02-15 13:12:44,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 279 transitions. [2023-02-15 13:12:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 13:12:44,447 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:44,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:44,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 13:12:44,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash -849555633, now seen corresponding path program 1 times [2023-02-15 13:12:44,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:44,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791224637] [2023-02-15 13:12:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:44,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:44,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:44,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791224637] [2023-02-15 13:12:44,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791224637] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:44,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:44,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:12:44,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470933821] [2023-02-15 13:12:44,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:44,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:12:44,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:44,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:12:44,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:44,515 INFO L87 Difference]: Start difference. First operand 254 states and 279 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:44,653 INFO L93 Difference]: Finished difference Result 377 states and 416 transitions. [2023-02-15 13:12:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:12:44,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 13:12:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:44,655 INFO L225 Difference]: With dead ends: 377 [2023-02-15 13:12:44,655 INFO L226 Difference]: Without dead ends: 377 [2023-02-15 13:12:44,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:12:44,657 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 193 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:44,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 312 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-02-15 13:12:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 252. [2023-02-15 13:12:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 139 states have (on average 1.870503597122302) internal successors, (260), 249 states have internal predecessors, (260), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 277 transitions. [2023-02-15 13:12:44,664 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 277 transitions. Word has length 11 [2023-02-15 13:12:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:44,664 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 277 transitions. [2023-02-15 13:12:44,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 277 transitions. [2023-02-15 13:12:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 13:12:44,665 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:44,665 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:44,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 13:12:44,666 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash 321246795, now seen corresponding path program 1 times [2023-02-15 13:12:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:44,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834929046] [2023-02-15 13:12:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:44,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:44,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834929046] [2023-02-15 13:12:44,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834929046] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:44,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:44,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:12:44,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132519896] [2023-02-15 13:12:44,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:44,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:12:44,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:44,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:12:44,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:12:44,727 INFO L87 Difference]: Start difference. First operand 252 states and 277 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:44,764 INFO L93 Difference]: Finished difference Result 407 states and 447 transitions. [2023-02-15 13:12:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:12:44,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2023-02-15 13:12:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:44,767 INFO L225 Difference]: With dead ends: 407 [2023-02-15 13:12:44,767 INFO L226 Difference]: Without dead ends: 407 [2023-02-15 13:12:44,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:12:44,768 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 602 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:44,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 508 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:12:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-02-15 13:12:44,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 252. [2023-02-15 13:12:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 139 states have (on average 1.8633093525179856) internal successors, (259), 249 states have internal predecessors, (259), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 276 transitions. [2023-02-15 13:12:44,773 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 276 transitions. Word has length 17 [2023-02-15 13:12:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:44,773 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 276 transitions. [2023-02-15 13:12:44,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 276 transitions. [2023-02-15 13:12:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 13:12:44,774 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:44,774 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:44,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 13:12:44,774 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:44,775 INFO L85 PathProgramCache]: Analyzing trace with hash -519843690, now seen corresponding path program 1 times [2023-02-15 13:12:44,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:44,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430620408] [2023-02-15 13:12:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:44,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:44,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:44,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430620408] [2023-02-15 13:12:44,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430620408] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:44,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:44,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:12:44,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762184074] [2023-02-15 13:12:44,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:44,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:12:44,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:12:44,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:12:44,819 INFO L87 Difference]: Start difference. First operand 252 states and 276 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:44,911 INFO L93 Difference]: Finished difference Result 714 states and 789 transitions. [2023-02-15 13:12:44,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:12:44,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 13:12:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:44,914 INFO L225 Difference]: With dead ends: 714 [2023-02-15 13:12:44,914 INFO L226 Difference]: Without dead ends: 714 [2023-02-15 13:12:44,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:12:44,914 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 1479 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:44,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1481 Valid, 705 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2023-02-15 13:12:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 280. [2023-02-15 13:12:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 168 states have (on average 1.8571428571428572) internal successors, (312), 277 states have internal predecessors, (312), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 328 transitions. [2023-02-15 13:12:44,931 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 328 transitions. Word has length 19 [2023-02-15 13:12:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:44,931 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 328 transitions. [2023-02-15 13:12:44,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 328 transitions. [2023-02-15 13:12:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 13:12:44,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:44,932 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:44,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 13:12:44,932 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:44,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash -519854939, now seen corresponding path program 1 times [2023-02-15 13:12:44,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:44,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469998210] [2023-02-15 13:12:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:44,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:44,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:44,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469998210] [2023-02-15 13:12:44,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469998210] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:44,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:44,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:12:44,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858247229] [2023-02-15 13:12:44,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:44,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:12:44,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:44,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:12:44,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:12:44,983 INFO L87 Difference]: Start difference. First operand 280 states and 328 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:45,269 INFO L93 Difference]: Finished difference Result 466 states and 533 transitions. [2023-02-15 13:12:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:12:45,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 19 [2023-02-15 13:12:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:45,271 INFO L225 Difference]: With dead ends: 466 [2023-02-15 13:12:45,271 INFO L226 Difference]: Without dead ends: 466 [2023-02-15 13:12:45,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:12:45,272 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 646 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:45,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 547 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:12:45,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-02-15 13:12:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 271. [2023-02-15 13:12:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 168 states have (on average 1.7857142857142858) internal successors, (300), 268 states have internal predecessors, (300), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 316 transitions. [2023-02-15 13:12:45,293 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 316 transitions. Word has length 19 [2023-02-15 13:12:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:45,293 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 316 transitions. [2023-02-15 13:12:45,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 316 transitions. [2023-02-15 13:12:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 13:12:45,294 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:45,294 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:45,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 13:12:45,295 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:45,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:45,295 INFO L85 PathProgramCache]: Analyzing trace with hash -519854938, now seen corresponding path program 1 times [2023-02-15 13:12:45,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:45,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601497959] [2023-02-15 13:12:45,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:45,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:45,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:45,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601497959] [2023-02-15 13:12:45,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601497959] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:45,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:45,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:12:45,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834082137] [2023-02-15 13:12:45,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:45,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:12:45,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:45,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:12:45,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:12:45,376 INFO L87 Difference]: Start difference. First operand 271 states and 316 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:45,709 INFO L93 Difference]: Finished difference Result 606 states and 668 transitions. [2023-02-15 13:12:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:12:45,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 19 [2023-02-15 13:12:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:45,711 INFO L225 Difference]: With dead ends: 606 [2023-02-15 13:12:45,711 INFO L226 Difference]: Without dead ends: 606 [2023-02-15 13:12:45,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:12:45,712 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 891 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:45,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 571 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:12:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2023-02-15 13:12:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 291. [2023-02-15 13:12:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 188 states have (on average 1.7234042553191489) internal successors, (324), 288 states have internal predecessors, (324), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 340 transitions. [2023-02-15 13:12:45,717 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 340 transitions. Word has length 19 [2023-02-15 13:12:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:45,718 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 340 transitions. [2023-02-15 13:12:45,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 340 transitions. [2023-02-15 13:12:45,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 13:12:45,718 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:45,718 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:12:45,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 13:12:45,719 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:45,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1987558854, now seen corresponding path program 1 times [2023-02-15 13:12:45,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:45,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573720975] [2023-02-15 13:12:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:45,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:12:45,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:45,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573720975] [2023-02-15 13:12:45,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573720975] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:45,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:45,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:12:45,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746662592] [2023-02-15 13:12:45,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:45,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:12:45,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:45,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:12:45,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:12:45,775 INFO L87 Difference]: Start difference. First operand 291 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:45,898 INFO L93 Difference]: Finished difference Result 373 states and 428 transitions. [2023-02-15 13:12:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:12:45,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-15 13:12:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:45,899 INFO L225 Difference]: With dead ends: 373 [2023-02-15 13:12:45,899 INFO L226 Difference]: Without dead ends: 373 [2023-02-15 13:12:45,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:12:45,900 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 104 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:45,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 838 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-02-15 13:12:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 290. [2023-02-15 13:12:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 188 states have (on average 1.7127659574468086) internal successors, (322), 287 states have internal predecessors, (322), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 337 transitions. [2023-02-15 13:12:45,905 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 337 transitions. Word has length 26 [2023-02-15 13:12:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:45,905 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 337 transitions. [2023-02-15 13:12:45,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 337 transitions. [2023-02-15 13:12:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 13:12:45,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:45,906 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:12:45,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 13:12:45,907 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:45,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1626991364, now seen corresponding path program 1 times [2023-02-15 13:12:45,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:45,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375794753] [2023-02-15 13:12:45,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:45,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:12:45,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:45,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375794753] [2023-02-15 13:12:45,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375794753] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:45,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:45,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:12:45,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322400026] [2023-02-15 13:12:45,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:45,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:12:45,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:45,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:12:45,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:12:45,964 INFO L87 Difference]: Start difference. First operand 290 states and 337 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:46,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:46,059 INFO L93 Difference]: Finished difference Result 289 states and 334 transitions. [2023-02-15 13:12:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:12:46,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-15 13:12:46,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:46,061 INFO L225 Difference]: With dead ends: 289 [2023-02-15 13:12:46,061 INFO L226 Difference]: Without dead ends: 289 [2023-02-15 13:12:46,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:12:46,062 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 20 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:46,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 863 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:46,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-02-15 13:12:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-02-15 13:12:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 188 states have (on average 1.702127659574468) internal successors, (320), 286 states have internal predecessors, (320), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 334 transitions. [2023-02-15 13:12:46,066 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 334 transitions. Word has length 26 [2023-02-15 13:12:46,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:46,066 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 334 transitions. [2023-02-15 13:12:46,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 334 transitions. [2023-02-15 13:12:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 13:12:46,067 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:46,067 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:46,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 13:12:46,068 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1169692160, now seen corresponding path program 1 times [2023-02-15 13:12:46,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:46,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65754159] [2023-02-15 13:12:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:46,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:46,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:46,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65754159] [2023-02-15 13:12:46,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65754159] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:46,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:46,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:12:46,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152028801] [2023-02-15 13:12:46,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:46,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:12:46,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:46,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:12:46,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:12:46,193 INFO L87 Difference]: Start difference. First operand 289 states and 334 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:46,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:46,414 INFO L93 Difference]: Finished difference Result 602 states and 659 transitions. [2023-02-15 13:12:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 13:12:46,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-15 13:12:46,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:46,416 INFO L225 Difference]: With dead ends: 602 [2023-02-15 13:12:46,416 INFO L226 Difference]: Without dead ends: 602 [2023-02-15 13:12:46,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:12:46,417 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1288 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:46,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1290 Valid, 1037 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:12:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2023-02-15 13:12:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 289. [2023-02-15 13:12:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 188 states have (on average 1.696808510638298) internal successors, (319), 286 states have internal predecessors, (319), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 333 transitions. [2023-02-15 13:12:46,424 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 333 transitions. Word has length 29 [2023-02-15 13:12:46,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:46,425 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 333 transitions. [2023-02-15 13:12:46,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 333 transitions. [2023-02-15 13:12:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 13:12:46,426 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:46,426 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:46,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-15 13:12:46,427 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash 698957523, now seen corresponding path program 1 times [2023-02-15 13:12:46,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:46,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262184585] [2023-02-15 13:12:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:46,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:46,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:46,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262184585] [2023-02-15 13:12:46,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262184585] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:46,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:46,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:12:46,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955776507] [2023-02-15 13:12:46,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:46,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:12:46,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:46,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:12:46,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:12:46,572 INFO L87 Difference]: Start difference. First operand 289 states and 333 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:46,778 INFO L93 Difference]: Finished difference Result 601 states and 657 transitions. [2023-02-15 13:12:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 13:12:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-15 13:12:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:46,781 INFO L225 Difference]: With dead ends: 601 [2023-02-15 13:12:46,781 INFO L226 Difference]: Without dead ends: 601 [2023-02-15 13:12:46,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:12:46,781 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1284 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:46,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 1037 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:12:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2023-02-15 13:12:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 289. [2023-02-15 13:12:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 188 states have (on average 1.6914893617021276) internal successors, (318), 286 states have internal predecessors, (318), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 332 transitions. [2023-02-15 13:12:46,788 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 332 transitions. Word has length 29 [2023-02-15 13:12:46,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:46,788 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 332 transitions. [2023-02-15 13:12:46,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:46,788 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 332 transitions. [2023-02-15 13:12:46,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 13:12:46,790 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:46,790 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:46,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 13:12:46,790 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:46,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1900933732, now seen corresponding path program 1 times [2023-02-15 13:12:46,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:46,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229167192] [2023-02-15 13:12:46,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:46,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:46,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:46,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229167192] [2023-02-15 13:12:46,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229167192] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:46,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:46,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 13:12:46,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430187563] [2023-02-15 13:12:46,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:46,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 13:12:46,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 13:12:46,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:12:46,964 INFO L87 Difference]: Start difference. First operand 289 states and 332 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:47,451 INFO L93 Difference]: Finished difference Result 674 states and 745 transitions. [2023-02-15 13:12:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 13:12:47,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 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 30 [2023-02-15 13:12:47,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:47,454 INFO L225 Difference]: With dead ends: 674 [2023-02-15 13:12:47,454 INFO L226 Difference]: Without dead ends: 674 [2023-02-15 13:12:47,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2023-02-15 13:12:47,455 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 1603 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:47,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1605 Valid, 806 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:12:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-02-15 13:12:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 290. [2023-02-15 13:12:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.693121693121693) internal successors, (320), 287 states have internal predecessors, (320), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 334 transitions. [2023-02-15 13:12:47,460 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 334 transitions. Word has length 30 [2023-02-15 13:12:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:47,460 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 334 transitions. [2023-02-15 13:12:47,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 334 transitions. [2023-02-15 13:12:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 13:12:47,461 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:47,461 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:47,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-15 13:12:47,462 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:47,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1900933731, now seen corresponding path program 1 times [2023-02-15 13:12:47,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:47,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226696264] [2023-02-15 13:12:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:47,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:47,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:47,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226696264] [2023-02-15 13:12:47,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226696264] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:47,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:47,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 13:12:47,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897803219] [2023-02-15 13:12:47,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:47,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 13:12:47,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:47,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 13:12:47,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:12:47,672 INFO L87 Difference]: Start difference. First operand 290 states and 334 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:48,442 INFO L93 Difference]: Finished difference Result 799 states and 878 transitions. [2023-02-15 13:12:48,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 13:12:48,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 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 30 [2023-02-15 13:12:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:48,445 INFO L225 Difference]: With dead ends: 799 [2023-02-15 13:12:48,445 INFO L226 Difference]: Without dead ends: 799 [2023-02-15 13:12:48,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-02-15 13:12:48,446 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1781 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1781 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:48,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1781 Valid, 769 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 13:12:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-02-15 13:12:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 290. [2023-02-15 13:12:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.687830687830688) internal successors, (319), 287 states have internal predecessors, (319), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 333 transitions. [2023-02-15 13:12:48,451 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 333 transitions. Word has length 30 [2023-02-15 13:12:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:48,451 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 333 transitions. [2023-02-15 13:12:48,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 333 transitions. [2023-02-15 13:12:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 13:12:48,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:48,451 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:48,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 13:12:48,452 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:48,452 INFO L85 PathProgramCache]: Analyzing trace with hash 192556862, now seen corresponding path program 1 times [2023-02-15 13:12:48,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:48,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585146454] [2023-02-15 13:12:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:48,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:48,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:48,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585146454] [2023-02-15 13:12:48,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585146454] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:48,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:48,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 13:12:48,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576316170] [2023-02-15 13:12:48,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:48,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 13:12:48,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:48,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 13:12:48,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:12:48,602 INFO L87 Difference]: Start difference. First operand 290 states and 333 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:49,173 INFO L93 Difference]: Finished difference Result 672 states and 743 transitions. [2023-02-15 13:12:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 13:12:49,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 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 30 [2023-02-15 13:12:49,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:49,175 INFO L225 Difference]: With dead ends: 672 [2023-02-15 13:12:49,175 INFO L226 Difference]: Without dead ends: 672 [2023-02-15 13:12:49,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2023-02-15 13:12:49,176 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 1437 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:49,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1439 Valid, 981 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 13:12:49,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2023-02-15 13:12:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 290. [2023-02-15 13:12:49,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.6825396825396826) internal successors, (318), 287 states have internal predecessors, (318), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:49,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 332 transitions. [2023-02-15 13:12:49,180 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 332 transitions. Word has length 30 [2023-02-15 13:12:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:49,180 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 332 transitions. [2023-02-15 13:12:49,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 332 transitions. [2023-02-15 13:12:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 13:12:49,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:49,181 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:49,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-15 13:12:49,181 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:49,181 INFO L85 PathProgramCache]: Analyzing trace with hash 192556863, now seen corresponding path program 1 times [2023-02-15 13:12:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:49,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245788364] [2023-02-15 13:12:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:49,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:49,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:49,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245788364] [2023-02-15 13:12:49,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245788364] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:49,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:49,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 13:12:49,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314542436] [2023-02-15 13:12:49,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:49,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 13:12:49,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 13:12:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:12:49,529 INFO L87 Difference]: Start difference. First operand 290 states and 332 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:50,189 INFO L93 Difference]: Finished difference Result 797 states and 876 transitions. [2023-02-15 13:12:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 13:12:50,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 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 30 [2023-02-15 13:12:50,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:50,191 INFO L225 Difference]: With dead ends: 797 [2023-02-15 13:12:50,191 INFO L226 Difference]: Without dead ends: 797 [2023-02-15 13:12:50,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-02-15 13:12:50,192 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1640 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:50,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1640 Valid, 882 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 13:12:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2023-02-15 13:12:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 290. [2023-02-15 13:12:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.6772486772486772) internal successors, (317), 287 states have internal predecessors, (317), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 331 transitions. [2023-02-15 13:12:50,197 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 331 transitions. Word has length 30 [2023-02-15 13:12:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:50,197 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 331 transitions. [2023-02-15 13:12:50,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 331 transitions. [2023-02-15 13:12:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 13:12:50,197 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:50,197 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:12:50,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-15 13:12:50,197 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:50,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:50,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1572782387, now seen corresponding path program 1 times [2023-02-15 13:12:50,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:50,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907882743] [2023-02-15 13:12:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:50,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:50,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:50,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907882743] [2023-02-15 13:12:50,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907882743] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:50,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:50,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 13:12:50,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576497709] [2023-02-15 13:12:50,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:50,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 13:12:50,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:50,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 13:12:50,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-15 13:12:50,653 INFO L87 Difference]: Start difference. First operand 290 states and 331 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:51,382 INFO L93 Difference]: Finished difference Result 596 states and 651 transitions. [2023-02-15 13:12:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 13:12:51,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-15 13:12:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:51,384 INFO L225 Difference]: With dead ends: 596 [2023-02-15 13:12:51,384 INFO L226 Difference]: Without dead ends: 596 [2023-02-15 13:12:51,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2023-02-15 13:12:51,385 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1625 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1625 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:51,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1625 Valid, 1531 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 13:12:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-02-15 13:12:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 291. [2023-02-15 13:12:51,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 190 states have (on average 1.6736842105263159) internal successors, (318), 288 states have internal predecessors, (318), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 332 transitions. [2023-02-15 13:12:51,393 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 332 transitions. Word has length 33 [2023-02-15 13:12:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:51,394 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 332 transitions. [2023-02-15 13:12:51,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 332 transitions. [2023-02-15 13:12:51,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 13:12:51,394 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:51,394 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:12:51,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-15 13:12:51,395 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:51,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1614681760, now seen corresponding path program 1 times [2023-02-15 13:12:51,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:51,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187038825] [2023-02-15 13:12:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:51,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:51,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:51,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187038825] [2023-02-15 13:12:51,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187038825] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:51,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:51,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 13:12:51,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886478843] [2023-02-15 13:12:51,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:51,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 13:12:51,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:51,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 13:12:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-15 13:12:51,674 INFO L87 Difference]: Start difference. First operand 291 states and 332 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:52,218 INFO L93 Difference]: Finished difference Result 595 states and 649 transitions. [2023-02-15 13:12:52,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 13:12:52,219 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-15 13:12:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:52,220 INFO L225 Difference]: With dead ends: 595 [2023-02-15 13:12:52,220 INFO L226 Difference]: Without dead ends: 595 [2023-02-15 13:12:52,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2023-02-15 13:12:52,221 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 2039 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2039 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:52,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2039 Valid, 1374 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:12:52,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-02-15 13:12:52,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 291. [2023-02-15 13:12:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 190 states have (on average 1.668421052631579) internal successors, (317), 288 states have internal predecessors, (317), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 331 transitions. [2023-02-15 13:12:52,226 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 331 transitions. Word has length 33 [2023-02-15 13:12:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:52,227 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 331 transitions. [2023-02-15 13:12:52,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 331 transitions. [2023-02-15 13:12:52,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 13:12:52,227 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:52,227 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:12:52,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-15 13:12:52,228 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:52,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:52,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1234347779, now seen corresponding path program 1 times [2023-02-15 13:12:52,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:52,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503743698] [2023-02-15 13:12:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:52,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:52,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:52,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503743698] [2023-02-15 13:12:52,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503743698] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:12:52,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291623226] [2023-02-15 13:12:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:52,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:52,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:12:52,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:12:52,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 13:12:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:52,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 13:12:52,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:12:52,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:12:52,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:12:52,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 13:12:52,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 13:12:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:52,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:12:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:53,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291623226] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:12:53,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:12:53,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 17 [2023-02-15 13:12:53,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504765868] [2023-02-15 13:12:53,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:12:53,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 13:12:53,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:53,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 13:12:53,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-02-15 13:12:53,020 INFO L87 Difference]: Start difference. First operand 291 states and 331 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:53,453 INFO L93 Difference]: Finished difference Result 486 states and 543 transitions. [2023-02-15 13:12:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:12:53,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 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 35 [2023-02-15 13:12:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:53,455 INFO L225 Difference]: With dead ends: 486 [2023-02-15 13:12:53,455 INFO L226 Difference]: Without dead ends: 486 [2023-02-15 13:12:53,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-02-15 13:12:53,456 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 665 mSDsluCounter, 2483 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:53,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 2710 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:12:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-02-15 13:12:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 307. [2023-02-15 13:12:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 206 states have (on average 1.6213592233009708) internal successors, (334), 304 states have internal predecessors, (334), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 348 transitions. [2023-02-15 13:12:53,461 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 348 transitions. Word has length 35 [2023-02-15 13:12:53,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:53,461 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 348 transitions. [2023-02-15 13:12:53,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 348 transitions. [2023-02-15 13:12:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 13:12:53,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:53,462 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:12:53,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 13:12:53,667 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,SelfDestructingSolverStorable21 [2023-02-15 13:12:53,667 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:53,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:53,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1275174605, now seen corresponding path program 1 times [2023-02-15 13:12:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:53,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75617912] [2023-02-15 13:12:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:53,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:53,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75617912] [2023-02-15 13:12:53,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75617912] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:53,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:53,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:12:53,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482664860] [2023-02-15 13:12:53,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:53,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:12:53,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:12:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:12:53,781 INFO L87 Difference]: Start difference. First operand 307 states and 348 transitions. Second operand has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:54,041 INFO L93 Difference]: Finished difference Result 499 states and 544 transitions. [2023-02-15 13:12:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:12:54,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2023-02-15 13:12:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:54,042 INFO L225 Difference]: With dead ends: 499 [2023-02-15 13:12:54,043 INFO L226 Difference]: Without dead ends: 499 [2023-02-15 13:12:54,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:12:54,043 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 479 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:54,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 609 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:12:54,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-02-15 13:12:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 313. [2023-02-15 13:12:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 212 states have (on average 1.6273584905660377) internal successors, (345), 310 states have internal predecessors, (345), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 359 transitions. [2023-02-15 13:12:54,048 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 359 transitions. Word has length 37 [2023-02-15 13:12:54,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:54,048 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 359 transitions. [2023-02-15 13:12:54,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 359 transitions. [2023-02-15 13:12:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 13:12:54,049 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:54,049 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:12:54,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 13:12:54,049 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:54,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1275174606, now seen corresponding path program 1 times [2023-02-15 13:12:54,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:54,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151186247] [2023-02-15 13:12:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:54,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:12:54,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:54,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151186247] [2023-02-15 13:12:54,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151186247] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:54,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:54,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:12:54,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163024512] [2023-02-15 13:12:54,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:54,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:12:54,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:54,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:12:54,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:12:54,136 INFO L87 Difference]: Start difference. First operand 313 states and 359 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:54,343 INFO L93 Difference]: Finished difference Result 632 states and 714 transitions. [2023-02-15 13:12:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 13:12:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 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 37 [2023-02-15 13:12:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:54,345 INFO L225 Difference]: With dead ends: 632 [2023-02-15 13:12:54,345 INFO L226 Difference]: Without dead ends: 632 [2023-02-15 13:12:54,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:12:54,361 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 986 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:54,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 556 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:12:54,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2023-02-15 13:12:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 313. [2023-02-15 13:12:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 214 states have (on average 1.6074766355140186) internal successors, (344), 310 states have internal predecessors, (344), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 358 transitions. [2023-02-15 13:12:54,368 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 358 transitions. Word has length 37 [2023-02-15 13:12:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:54,368 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 358 transitions. [2023-02-15 13:12:54,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 358 transitions. [2023-02-15 13:12:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 13:12:54,369 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:54,369 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:54,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-15 13:12:54,369 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:54,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1375067782, now seen corresponding path program 1 times [2023-02-15 13:12:54,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:54,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247588967] [2023-02-15 13:12:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:54,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:54,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:54,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247588967] [2023-02-15 13:12:54,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247588967] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:54,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:54,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 13:12:54,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279456537] [2023-02-15 13:12:54,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:54,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:12:54,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:54,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:12:54,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:12:54,454 INFO L87 Difference]: Start difference. First operand 313 states and 358 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:54,504 INFO L93 Difference]: Finished difference Result 426 states and 467 transitions. [2023-02-15 13:12:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:12:54,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 13:12:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:54,506 INFO L225 Difference]: With dead ends: 426 [2023-02-15 13:12:54,506 INFO L226 Difference]: Without dead ends: 426 [2023-02-15 13:12:54,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:12:54,507 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 805 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:54,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 904 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:12:54,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-02-15 13:12:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 313. [2023-02-15 13:12:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 214 states have (on average 1.602803738317757) internal successors, (343), 310 states have internal predecessors, (343), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 357 transitions. [2023-02-15 13:12:54,524 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 357 transitions. Word has length 39 [2023-02-15 13:12:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:54,525 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 357 transitions. [2023-02-15 13:12:54,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 357 transitions. [2023-02-15 13:12:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 13:12:54,528 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:54,528 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:54,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-15 13:12:54,528 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1375068993, now seen corresponding path program 1 times [2023-02-15 13:12:54,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:54,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162956608] [2023-02-15 13:12:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:54,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:12:54,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:54,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162956608] [2023-02-15 13:12:54,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162956608] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:54,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:54,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:12:54,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949632402] [2023-02-15 13:12:54,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:54,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:12:54,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:54,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:12:54,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:12:54,616 INFO L87 Difference]: Start difference. First operand 313 states and 357 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:54,835 INFO L93 Difference]: Finished difference Result 573 states and 644 transitions. [2023-02-15 13:12:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:12:54,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 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 39 [2023-02-15 13:12:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:54,837 INFO L225 Difference]: With dead ends: 573 [2023-02-15 13:12:54,837 INFO L226 Difference]: Without dead ends: 573 [2023-02-15 13:12:54,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:12:54,837 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 449 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:54,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 719 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:12:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2023-02-15 13:12:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 310. [2023-02-15 13:12:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 214 states have (on average 1.574766355140187) internal successors, (337), 307 states have internal predecessors, (337), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 351 transitions. [2023-02-15 13:12:54,842 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 351 transitions. Word has length 39 [2023-02-15 13:12:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:54,842 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 351 transitions. [2023-02-15 13:12:54,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 351 transitions. [2023-02-15 13:12:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 13:12:54,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:54,842 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:54,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-15 13:12:54,843 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1375068992, now seen corresponding path program 1 times [2023-02-15 13:12:54,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:54,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677659357] [2023-02-15 13:12:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:54,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:54,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677659357] [2023-02-15 13:12:54,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677659357] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:54,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:54,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:12:54,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229403002] [2023-02-15 13:12:54,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:54,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:12:54,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:54,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:12:54,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:12:54,935 INFO L87 Difference]: Start difference. First operand 310 states and 351 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:55,152 INFO L93 Difference]: Finished difference Result 418 states and 458 transitions. [2023-02-15 13:12:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:12:55,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 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 39 [2023-02-15 13:12:55,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:55,154 INFO L225 Difference]: With dead ends: 418 [2023-02-15 13:12:55,154 INFO L226 Difference]: Without dead ends: 418 [2023-02-15 13:12:55,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:12:55,154 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 356 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:55,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 557 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:12:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-02-15 13:12:55,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 310. [2023-02-15 13:12:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 214 states have (on average 1.560747663551402) internal successors, (334), 307 states have internal predecessors, (334), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 348 transitions. [2023-02-15 13:12:55,158 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 348 transitions. Word has length 39 [2023-02-15 13:12:55,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:55,158 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 348 transitions. [2023-02-15 13:12:55,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 348 transitions. [2023-02-15 13:12:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 13:12:55,159 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:55,159 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:55,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-15 13:12:55,159 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1377050303, now seen corresponding path program 1 times [2023-02-15 13:12:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:55,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646722357] [2023-02-15 13:12:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:55,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:55,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:55,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646722357] [2023-02-15 13:12:55,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646722357] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:55,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:55,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 13:12:55,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586146921] [2023-02-15 13:12:55,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:55,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:12:55,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:55,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:12:55,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:12:55,207 INFO L87 Difference]: Start difference. First operand 310 states and 348 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:55,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:55,314 INFO L93 Difference]: Finished difference Result 541 states and 594 transitions. [2023-02-15 13:12:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 13:12:55,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 39 [2023-02-15 13:12:55,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:55,316 INFO L225 Difference]: With dead ends: 541 [2023-02-15 13:12:55,316 INFO L226 Difference]: Without dead ends: 541 [2023-02-15 13:12:55,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 13:12:55,316 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 1089 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:55,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 1014 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2023-02-15 13:12:55,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 310. [2023-02-15 13:12:55,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 214 states have (on average 1.5560747663551402) internal successors, (333), 307 states have internal predecessors, (333), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 347 transitions. [2023-02-15 13:12:55,321 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 347 transitions. Word has length 39 [2023-02-15 13:12:55,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:55,321 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 347 transitions. [2023-02-15 13:12:55,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:55,322 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 347 transitions. [2023-02-15 13:12:55,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 13:12:55,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:55,322 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:55,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-15 13:12:55,322 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:55,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:55,323 INFO L85 PathProgramCache]: Analyzing trace with hash 718105722, now seen corresponding path program 1 times [2023-02-15 13:12:55,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:55,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821684559] [2023-02-15 13:12:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:55,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:55,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:55,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821684559] [2023-02-15 13:12:55,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821684559] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:12:55,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902937605] [2023-02-15 13:12:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:55,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:55,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:12:55,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:12:55,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 13:12:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:55,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 13:12:55,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:12:55,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:12:55,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:12:55,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 13:12:55,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 13:12:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:55,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:12:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:56,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902937605] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:12:56,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:12:56,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 13 [2023-02-15 13:12:56,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097855822] [2023-02-15 13:12:56,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:12:56,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 13:12:56,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:56,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 13:12:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-15 13:12:56,043 INFO L87 Difference]: Start difference. First operand 310 states and 347 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:56,318 INFO L93 Difference]: Finished difference Result 390 states and 432 transitions. [2023-02-15 13:12:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 13:12:56,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-15 13:12:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:56,320 INFO L225 Difference]: With dead ends: 390 [2023-02-15 13:12:56,320 INFO L226 Difference]: Without dead ends: 390 [2023-02-15 13:12:56,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-02-15 13:12:56,321 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 403 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:56,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 1684 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:12:56,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-02-15 13:12:56,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 330. [2023-02-15 13:12:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 234 states have (on average 1.5128205128205128) internal successors, (354), 327 states have internal predecessors, (354), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:56,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 368 transitions. [2023-02-15 13:12:56,328 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 368 transitions. Word has length 42 [2023-02-15 13:12:56,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:56,339 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 368 transitions. [2023-02-15 13:12:56,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 368 transitions. [2023-02-15 13:12:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 13:12:56,339 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:56,340 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:56,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 13:12:56,545 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,SelfDestructingSolverStorable28 [2023-02-15 13:12:56,545 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:56,545 INFO L85 PathProgramCache]: Analyzing trace with hash -551533569, now seen corresponding path program 1 times [2023-02-15 13:12:56,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:56,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442719207] [2023-02-15 13:12:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:56,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:56,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:56,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442719207] [2023-02-15 13:12:56,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442719207] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:12:56,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673909524] [2023-02-15 13:12:56,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:56,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:56,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:12:56,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:12:56,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 13:12:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:56,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 13:12:56,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:12:56,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:12:56,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:12:56,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 13:12:56,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 13:12:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:56,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:12:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:57,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673909524] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:12:57,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:12:57,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 12 [2023-02-15 13:12:57,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443412629] [2023-02-15 13:12:57,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:12:57,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 13:12:57,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:57,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 13:12:57,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:12:57,067 INFO L87 Difference]: Start difference. First operand 330 states and 368 transitions. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:57,247 INFO L93 Difference]: Finished difference Result 377 states and 417 transitions. [2023-02-15 13:12:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 13:12:57,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 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 41 [2023-02-15 13:12:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:57,249 INFO L225 Difference]: With dead ends: 377 [2023-02-15 13:12:57,249 INFO L226 Difference]: Without dead ends: 377 [2023-02-15 13:12:57,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-02-15 13:12:57,249 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 262 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:57,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1521 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:12:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-02-15 13:12:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 330. [2023-02-15 13:12:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 234 states have (on average 1.5085470085470085) internal successors, (353), 327 states have internal predecessors, (353), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 367 transitions. [2023-02-15 13:12:57,253 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 367 transitions. Word has length 41 [2023-02-15 13:12:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:57,253 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 367 transitions. [2023-02-15 13:12:57,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 367 transitions. [2023-02-15 13:12:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 13:12:57,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:57,254 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:12:57,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 13:12:57,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:57,461 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:57,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:57,461 INFO L85 PathProgramCache]: Analyzing trace with hash -163923031, now seen corresponding path program 1 times [2023-02-15 13:12:57,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:57,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499167490] [2023-02-15 13:12:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:57,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:57,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:57,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499167490] [2023-02-15 13:12:57,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499167490] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:12:57,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:12:57,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 13:12:57,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685000033] [2023-02-15 13:12:57,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:12:57,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 13:12:57,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:57,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 13:12:57,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-15 13:12:57,635 INFO L87 Difference]: Start difference. First operand 330 states and 367 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:12:58,021 INFO L93 Difference]: Finished difference Result 429 states and 465 transitions. [2023-02-15 13:12:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:12:58,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-15 13:12:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:12:58,022 INFO L225 Difference]: With dead ends: 429 [2023-02-15 13:12:58,022 INFO L226 Difference]: Without dead ends: 429 [2023-02-15 13:12:58,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-02-15 13:12:58,023 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 919 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:12:58,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 1724 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:12:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2023-02-15 13:12:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 342. [2023-02-15 13:12:58,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 246 states have (on average 1.491869918699187) internal successors, (367), 339 states have internal predecessors, (367), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:12:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 381 transitions. [2023-02-15 13:12:58,027 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 381 transitions. Word has length 45 [2023-02-15 13:12:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:12:58,027 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 381 transitions. [2023-02-15 13:12:58,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:12:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 381 transitions. [2023-02-15 13:12:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 13:12:58,028 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:12:58,028 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:12:58,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-15 13:12:58,028 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:12:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:12:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1832676911, now seen corresponding path program 2 times [2023-02-15 13:12:58,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:12:58,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182732643] [2023-02-15 13:12:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:12:58,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:12:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:12:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:58,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:12:58,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182732643] [2023-02-15 13:12:58,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182732643] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:12:58,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311147634] [2023-02-15 13:12:58,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 13:12:58,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:12:58,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:12:58,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:12:58,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 13:12:58,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 13:12:58,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:12:58,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 13:12:58,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:12:58,555 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 [2023-02-15 13:12:58,571 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 13:12:58,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 13:12:58,587 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 13:12:58,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 13:12:58,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:12:58,747 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:12:58,748 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 9 [2023-02-15 13:12:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:58,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:12:58,963 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 16 treesize of output 14 [2023-02-15 13:12:58,967 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 24 treesize of output 20 [2023-02-15 13:12:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:12:59,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311147634] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:12:59,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:12:59,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 11] total 24 [2023-02-15 13:12:59,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973567410] [2023-02-15 13:12:59,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:12:59,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 13:12:59,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:12:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 13:12:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2023-02-15 13:12:59,127 INFO L87 Difference]: Start difference. First operand 342 states and 381 transitions. Second operand has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:00,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:00,470 INFO L93 Difference]: Finished difference Result 662 states and 735 transitions. [2023-02-15 13:13:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 13:13:00,471 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 states have internal predecessors, (111), 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 46 [2023-02-15 13:13:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:00,472 INFO L225 Difference]: With dead ends: 662 [2023-02-15 13:13:00,472 INFO L226 Difference]: Without dead ends: 662 [2023-02-15 13:13:00,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=1052, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 13:13:00,473 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 3123 mSDsluCounter, 2432 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3125 SdHoareTripleChecker+Valid, 2655 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:00,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3125 Valid, 2655 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2565 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 13:13:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2023-02-15 13:13:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 344. [2023-02-15 13:13:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 248 states have (on average 1.4919354838709677) internal successors, (370), 341 states have internal predecessors, (370), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 384 transitions. [2023-02-15 13:13:00,478 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 384 transitions. Word has length 46 [2023-02-15 13:13:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:00,479 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 384 transitions. [2023-02-15 13:13:00,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 384 transitions. [2023-02-15 13:13:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 13:13:00,479 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:00,479 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:13:00,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 13:13:00,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:00,685 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:00,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:00,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1832676912, now seen corresponding path program 1 times [2023-02-15 13:13:00,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:00,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825524045] [2023-02-15 13:13:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:00,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:01,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:01,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825524045] [2023-02-15 13:13:01,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825524045] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:13:01,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203277704] [2023-02-15 13:13:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:01,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:01,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:13:01,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:13:01,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 13:13:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:01,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 13:13:01,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:13:01,290 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 [2023-02-15 13:13:01,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:01,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 13:13:01,325 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 13:13:01,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 13:13:01,342 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:13:01,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-02-15 13:13:01,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:13:01,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:13:01,621 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:13:01,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-02-15 13:13:01,624 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:13:01,624 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 9 [2023-02-15 13:13:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:01,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:13:02,499 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 29 treesize of output 27 [2023-02-15 13:13:02,501 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 27 treesize of output 25 [2023-02-15 13:13:02,504 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 46 treesize of output 42 [2023-02-15 13:13:02,506 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 66 treesize of output 58 [2023-02-15 13:13:02,550 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 16 treesize of output 14 [2023-02-15 13:13:02,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:02,889 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 149 treesize of output 143 [2023-02-15 13:13:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:03,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203277704] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:13:03,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:13:03,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2023-02-15 13:13:03,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880424803] [2023-02-15 13:13:03,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:13:03,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 13:13:03,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 13:13:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 13:13:03,040 INFO L87 Difference]: Start difference. First operand 344 states and 384 transitions. Second operand has 35 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:06,128 INFO L93 Difference]: Finished difference Result 944 states and 1037 transitions. [2023-02-15 13:13:06,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 13:13:06,128 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 35 states have internal predecessors, (120), 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 46 [2023-02-15 13:13:06,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:06,130 INFO L225 Difference]: With dead ends: 944 [2023-02-15 13:13:06,131 INFO L226 Difference]: Without dead ends: 944 [2023-02-15 13:13:06,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=662, Invalid=2644, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 13:13:06,132 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 5598 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 3438 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5600 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 3559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 3438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:06,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5600 Valid, 2974 Invalid, 3559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 3438 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-15 13:13:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2023-02-15 13:13:06,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 360. [2023-02-15 13:13:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 267 states have (on average 1.4606741573033708) internal successors, (390), 357 states have internal predecessors, (390), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 404 transitions. [2023-02-15 13:13:06,138 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 404 transitions. Word has length 46 [2023-02-15 13:13:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:06,139 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 404 transitions. [2023-02-15 13:13:06,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:06,139 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 404 transitions. [2023-02-15 13:13:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 13:13:06,139 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:06,139 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:13:06,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 13:13:06,339 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,SelfDestructingSolverStorable32 [2023-02-15 13:13:06,340 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash -56370646, now seen corresponding path program 1 times [2023-02-15 13:13:06,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:06,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905500121] [2023-02-15 13:13:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:06,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:13:06,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:06,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905500121] [2023-02-15 13:13:06,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905500121] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:06,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:06,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:13:06,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147862297] [2023-02-15 13:13:06,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:06,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:13:06,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:06,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:13:06,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:13:06,497 INFO L87 Difference]: Start difference. First operand 360 states and 404 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:06,788 INFO L93 Difference]: Finished difference Result 492 states and 546 transitions. [2023-02-15 13:13:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:13:06,789 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 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 48 [2023-02-15 13:13:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:06,790 INFO L225 Difference]: With dead ends: 492 [2023-02-15 13:13:06,790 INFO L226 Difference]: Without dead ends: 492 [2023-02-15 13:13:06,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-02-15 13:13:06,791 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 275 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:06,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1193 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:13:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-02-15 13:13:06,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 363. [2023-02-15 13:13:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 272 states have (on average 1.4411764705882353) internal successors, (392), 360 states have internal predecessors, (392), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 406 transitions. [2023-02-15 13:13:06,795 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 406 transitions. Word has length 48 [2023-02-15 13:13:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:06,795 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 406 transitions. [2023-02-15 13:13:06,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:06,795 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 406 transitions. [2023-02-15 13:13:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 13:13:06,795 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:06,795 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:13:06,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-15 13:13:06,796 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash -56370645, now seen corresponding path program 1 times [2023-02-15 13:13:06,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:06,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001509541] [2023-02-15 13:13:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:06,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:07,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:07,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001509541] [2023-02-15 13:13:07,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001509541] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:07,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:07,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 13:13:07,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393964598] [2023-02-15 13:13:07,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:07,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 13:13:07,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:07,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 13:13:07,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-02-15 13:13:07,011 INFO L87 Difference]: Start difference. First operand 363 states and 406 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:07,515 INFO L93 Difference]: Finished difference Result 469 states and 512 transitions. [2023-02-15 13:13:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 13:13:07,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 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 48 [2023-02-15 13:13:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:07,516 INFO L225 Difference]: With dead ends: 469 [2023-02-15 13:13:07,516 INFO L226 Difference]: Without dead ends: 469 [2023-02-15 13:13:07,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-02-15 13:13:07,517 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 987 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:07,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 1312 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:13:07,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-02-15 13:13:07,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 366. [2023-02-15 13:13:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 275 states have (on average 1.4363636363636363) internal successors, (395), 363 states have internal predecessors, (395), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 409 transitions. [2023-02-15 13:13:07,521 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 409 transitions. Word has length 48 [2023-02-15 13:13:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:07,521 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 409 transitions. [2023-02-15 13:13:07,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 409 transitions. [2023-02-15 13:13:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 13:13:07,522 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:07,522 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:13:07,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-15 13:13:07,522 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:07,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:07,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2146523909, now seen corresponding path program 1 times [2023-02-15 13:13:07,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:07,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316838297] [2023-02-15 13:13:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:07,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:13:07,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:07,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316838297] [2023-02-15 13:13:07,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316838297] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:13:07,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457996613] [2023-02-15 13:13:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:07,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:07,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:13:07,863 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:13:07,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 13:13:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:08,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 13:13:08,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:13:08,091 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 31 treesize of output 19 [2023-02-15 13:13:08,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-15 13:13:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 13:13:08,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:13:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 13:13:08,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457996613] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:13:08,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:13:08,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2023-02-15 13:13:08,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940804531] [2023-02-15 13:13:08,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:13:08,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 13:13:08,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:08,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 13:13:08,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-02-15 13:13:08,194 INFO L87 Difference]: Start difference. First operand 366 states and 409 transitions. Second operand has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:08,612 INFO L93 Difference]: Finished difference Result 364 states and 403 transitions. [2023-02-15 13:13:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:13:08,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-02-15 13:13:08,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:08,615 INFO L225 Difference]: With dead ends: 364 [2023-02-15 13:13:08,615 INFO L226 Difference]: Without dead ends: 364 [2023-02-15 13:13:08,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2023-02-15 13:13:08,616 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 2008 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:08,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 658 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:13:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-02-15 13:13:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2023-02-15 13:13:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 275 states have (on average 1.4218181818181819) internal successors, (391), 361 states have internal predecessors, (391), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 403 transitions. [2023-02-15 13:13:08,626 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 403 transitions. Word has length 50 [2023-02-15 13:13:08,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:08,626 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 403 transitions. [2023-02-15 13:13:08,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 403 transitions. [2023-02-15 13:13:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 13:13:08,627 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:08,627 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:13:08,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 13:13:08,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:08,833 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:08,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:08,834 INFO L85 PathProgramCache]: Analyzing trace with hash -755050628, now seen corresponding path program 1 times [2023-02-15 13:13:08,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:08,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527055769] [2023-02-15 13:13:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:08,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:13:08,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:08,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527055769] [2023-02-15 13:13:08,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527055769] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:08,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:08,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:13:08,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791814775] [2023-02-15 13:13:08,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:08,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:13:08,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:08,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:13:08,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:13:08,904 INFO L87 Difference]: Start difference. First operand 364 states and 403 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:08,981 INFO L93 Difference]: Finished difference Result 363 states and 400 transitions. [2023-02-15 13:13:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:13:08,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-02-15 13:13:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:08,983 INFO L225 Difference]: With dead ends: 363 [2023-02-15 13:13:08,983 INFO L226 Difference]: Without dead ends: 363 [2023-02-15 13:13:08,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:13:08,984 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 27 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:08,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 823 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:13:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-02-15 13:13:08,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2023-02-15 13:13:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 275 states have (on average 1.4145454545454546) internal successors, (389), 360 states have internal predecessors, (389), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 400 transitions. [2023-02-15 13:13:08,987 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 400 transitions. Word has length 53 [2023-02-15 13:13:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:08,988 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 400 transitions. [2023-02-15 13:13:08,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 400 transitions. [2023-02-15 13:13:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 13:13:08,988 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:08,988 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:13:08,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-15 13:13:08,989 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:08,989 INFO L85 PathProgramCache]: Analyzing trace with hash -162853312, now seen corresponding path program 1 times [2023-02-15 13:13:08,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:08,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624535854] [2023-02-15 13:13:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:08,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:13:09,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:09,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624535854] [2023-02-15 13:13:09,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624535854] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:09,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:09,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 13:13:09,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995409724] [2023-02-15 13:13:09,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:09,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 13:13:09,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:09,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 13:13:09,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-15 13:13:09,173 INFO L87 Difference]: Start difference. First operand 363 states and 400 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:09,487 INFO L93 Difference]: Finished difference Result 480 states and 526 transitions. [2023-02-15 13:13:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:13:09,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 52 [2023-02-15 13:13:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:09,488 INFO L225 Difference]: With dead ends: 480 [2023-02-15 13:13:09,488 INFO L226 Difference]: Without dead ends: 480 [2023-02-15 13:13:09,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-02-15 13:13:09,489 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 268 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:09,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1754 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:13:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-02-15 13:13:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 362. [2023-02-15 13:13:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 274 states have (on average 1.4124087591240877) internal successors, (387), 359 states have internal predecessors, (387), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 398 transitions. [2023-02-15 13:13:09,493 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 398 transitions. Word has length 52 [2023-02-15 13:13:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:09,493 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 398 transitions. [2023-02-15 13:13:09,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 398 transitions. [2023-02-15 13:13:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 13:13:09,494 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:09,494 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:13:09,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-02-15 13:13:09,494 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:09,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1077445880, now seen corresponding path program 2 times [2023-02-15 13:13:09,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:09,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919133067] [2023-02-15 13:13:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:09,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:09,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:09,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919133067] [2023-02-15 13:13:09,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919133067] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:13:09,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879203358] [2023-02-15 13:13:09,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 13:13:09,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:09,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:13:09,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:13:09,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 13:13:10,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 13:13:10,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:13:10,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 13:13:10,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:13:10,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 13:13:10,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 13:13:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 13:13:10,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:13:10,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879203358] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:10,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:13:10,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 18 [2023-02-15 13:13:10,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210385147] [2023-02-15 13:13:10,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:10,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:13:10,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:10,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:13:10,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-02-15 13:13:10,086 INFO L87 Difference]: Start difference. First operand 362 states and 398 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:10,212 INFO L93 Difference]: Finished difference Result 361 states and 394 transitions. [2023-02-15 13:13:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:13:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-02-15 13:13:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:10,213 INFO L225 Difference]: With dead ends: 361 [2023-02-15 13:13:10,214 INFO L226 Difference]: Without dead ends: 361 [2023-02-15 13:13:10,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-02-15 13:13:10,214 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 101 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:10,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 899 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:13:10,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-02-15 13:13:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 356. [2023-02-15 13:13:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 269 states have (on average 1.4089219330855018) internal successors, (379), 353 states have internal predecessors, (379), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:10,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 389 transitions. [2023-02-15 13:13:10,218 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 389 transitions. Word has length 53 [2023-02-15 13:13:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:10,218 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 389 transitions. [2023-02-15 13:13:10,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 389 transitions. [2023-02-15 13:13:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 13:13:10,218 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:10,218 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:13:10,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 13:13:10,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:10,424 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:10,424 INFO L85 PathProgramCache]: Analyzing trace with hash 914566065, now seen corresponding path program 2 times [2023-02-15 13:13:10,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:10,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214454145] [2023-02-15 13:13:10,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:10,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:13:10,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:10,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214454145] [2023-02-15 13:13:10,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214454145] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:13:10,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832360551] [2023-02-15 13:13:10,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 13:13:10,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:10,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:13:10,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:13:10,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 13:13:10,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 13:13:10,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:13:10,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 13:13:10,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:13:10,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 13:13:10,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 13:13:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 13:13:11,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:13:11,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832360551] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:11,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:13:11,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2023-02-15 13:13:11,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901114090] [2023-02-15 13:13:11,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:11,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:13:11,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:11,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:13:11,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-02-15 13:13:11,028 INFO L87 Difference]: Start difference. First operand 356 states and 389 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:11,292 INFO L93 Difference]: Finished difference Result 444 states and 481 transitions. [2023-02-15 13:13:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:13:11,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 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 52 [2023-02-15 13:13:11,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:11,294 INFO L225 Difference]: With dead ends: 444 [2023-02-15 13:13:11,294 INFO L226 Difference]: Without dead ends: 444 [2023-02-15 13:13:11,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-02-15 13:13:11,294 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 190 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:11,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1481 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:13:11,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-02-15 13:13:11,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 360. [2023-02-15 13:13:11,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 273 states have (on average 1.4029304029304028) internal successors, (383), 357 states have internal predecessors, (383), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:11,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 393 transitions. [2023-02-15 13:13:11,299 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 393 transitions. Word has length 52 [2023-02-15 13:13:11,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:11,299 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 393 transitions. [2023-02-15 13:13:11,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:11,299 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 393 transitions. [2023-02-15 13:13:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 13:13:11,299 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:11,300 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:13:11,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 13:13:11,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-15 13:13:11,505 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:11,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1612035677, now seen corresponding path program 1 times [2023-02-15 13:13:11,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:11,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340383762] [2023-02-15 13:13:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:11,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 13:13:11,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:11,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340383762] [2023-02-15 13:13:11,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340383762] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:11,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:11,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:13:11,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131977958] [2023-02-15 13:13:11,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:11,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:13:11,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:11,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:13:11,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:13:11,597 INFO L87 Difference]: Start difference. First operand 360 states and 393 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:12,066 INFO L93 Difference]: Finished difference Result 535 states and 583 transitions. [2023-02-15 13:13:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 13:13:12,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 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 55 [2023-02-15 13:13:12,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:12,069 INFO L225 Difference]: With dead ends: 535 [2023-02-15 13:13:12,069 INFO L226 Difference]: Without dead ends: 535 [2023-02-15 13:13:12,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-02-15 13:13:12,069 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 597 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:12,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 891 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:13:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2023-02-15 13:13:12,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 363. [2023-02-15 13:13:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 276 states have (on average 1.4021739130434783) internal successors, (387), 360 states have internal predecessors, (387), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 397 transitions. [2023-02-15 13:13:12,090 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 397 transitions. Word has length 55 [2023-02-15 13:13:12,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:12,091 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 397 transitions. [2023-02-15 13:13:12,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 397 transitions. [2023-02-15 13:13:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 13:13:12,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:12,092 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:13:12,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-02-15 13:13:12,092 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:12,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1612035676, now seen corresponding path program 1 times [2023-02-15 13:13:12,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:12,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974684723] [2023-02-15 13:13:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:12,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 13:13:12,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:12,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974684723] [2023-02-15 13:13:12,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974684723] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:12,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:12,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 13:13:12,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332299965] [2023-02-15 13:13:12,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:12,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:13:12,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:12,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:13:12,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:13:12,245 INFO L87 Difference]: Start difference. First operand 363 states and 397 transitions. Second operand has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:12,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:12,594 INFO L93 Difference]: Finished difference Result 580 states and 627 transitions. [2023-02-15 13:13:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 13:13:12,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 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 55 [2023-02-15 13:13:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:12,596 INFO L225 Difference]: With dead ends: 580 [2023-02-15 13:13:12,596 INFO L226 Difference]: Without dead ends: 580 [2023-02-15 13:13:12,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:13:12,597 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 598 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:12,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 878 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:13:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-02-15 13:13:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 380. [2023-02-15 13:13:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 293 states have (on average 1.4027303754266212) internal successors, (411), 377 states have internal predecessors, (411), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 421 transitions. [2023-02-15 13:13:12,601 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 421 transitions. Word has length 55 [2023-02-15 13:13:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:12,602 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 421 transitions. [2023-02-15 13:13:12,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 421 transitions. [2023-02-15 13:13:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 13:13:12,602 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:12,602 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:13:12,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-02-15 13:13:12,603 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:12,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:12,603 INFO L85 PathProgramCache]: Analyzing trace with hash 874630922, now seen corresponding path program 1 times [2023-02-15 13:13:12,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:12,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457423450] [2023-02-15 13:13:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:12,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:13,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:13,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457423450] [2023-02-15 13:13:13,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457423450] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:13:13,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025724616] [2023-02-15 13:13:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:13,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:13,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:13:13,410 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:13:13,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 13:13:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-15 13:13:13,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:13:13,600 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 [2023-02-15 13:13:13,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:13:13,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:13,639 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 22 treesize of output 21 [2023-02-15 13:13:13,665 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 13:13:13,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 13:13:13,696 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 15 treesize of output 17 [2023-02-15 13:13:13,706 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 15 treesize of output 17 [2023-02-15 13:13:13,722 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 13:13:13,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 13:13:13,751 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 15 treesize of output 17 [2023-02-15 13:13:13,757 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 22 treesize of output 21 [2023-02-15 13:13:13,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:13:13,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 13:13:14,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:14,087 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2023-02-15 13:13:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:14,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:13:14,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:14,332 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2023-02-15 13:13:14,387 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.base_22| Int) (v_arrayElimArr_1 (Array Int Int))) (or (not (= (select v_arrayElimArr_1 4) |c_ULTIMATE.start_main_~data~0#1.base|)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_22| v_arrayElimArr_1) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_22|) 0)))) is different from false [2023-02-15 13:13:14,394 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1732 (Array Int Int)) (|v_ULTIMATE.start_main_~item~0#1.base_22| Int) (v_arrayElimArr_1 (Array Int Int))) (or (not (= (select v_arrayElimArr_1 4) |c_ULTIMATE.start_main_~data~0#1.base|)) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1732) |v_ULTIMATE.start_main_~item~0#1.base_22| v_arrayElimArr_1) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_22|) 0)))) is different from false [2023-02-15 13:13:14,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:14,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2023-02-15 13:13:14,633 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 65 treesize of output 57 [2023-02-15 13:13:14,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:14,641 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 59 treesize of output 61 [2023-02-15 13:13:14,644 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 48 treesize of output 46 [2023-02-15 13:13:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-02-15 13:13:14,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025724616] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:13:14,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:13:14,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 18] total 41 [2023-02-15 13:13:14,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530894428] [2023-02-15 13:13:14,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:13:14,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 13:13:14,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 13:13:14,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1368, Unknown=3, NotChecked=150, Total=1640 [2023-02-15 13:13:14,815 INFO L87 Difference]: Start difference. First operand 380 states and 421 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:17,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:17,988 INFO L93 Difference]: Finished difference Result 675 states and 737 transitions. [2023-02-15 13:13:17,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 13:13:17,988 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-15 13:13:17,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:17,990 INFO L225 Difference]: With dead ends: 675 [2023-02-15 13:13:17,990 INFO L226 Difference]: Without dead ends: 675 [2023-02-15 13:13:17,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=648, Invalid=3017, Unknown=3, NotChecked=238, Total=3906 [2023-02-15 13:13:17,993 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 4417 mSDsluCounter, 4241 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4419 SdHoareTripleChecker+Valid, 4505 SdHoareTripleChecker+Invalid, 4140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1094 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:17,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4419 Valid, 4505 Invalid, 4140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3004 Invalid, 0 Unknown, 1094 Unchecked, 1.6s Time] [2023-02-15 13:13:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2023-02-15 13:13:18,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 380. [2023-02-15 13:13:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 293 states have (on average 1.3993174061433447) internal successors, (410), 377 states have internal predecessors, (410), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 420 transitions. [2023-02-15 13:13:18,002 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 420 transitions. Word has length 56 [2023-02-15 13:13:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:18,003 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 420 transitions. [2023-02-15 13:13:18,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 420 transitions. [2023-02-15 13:13:18,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 13:13:18,004 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:18,004 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:13:18,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 13:13:18,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:18,219 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:18,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1551686691, now seen corresponding path program 1 times [2023-02-15 13:13:18,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:18,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126715242] [2023-02-15 13:13:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:18,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:18,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:18,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126715242] [2023-02-15 13:13:18,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126715242] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:13:18,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243317748] [2023-02-15 13:13:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:18,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:18,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:13:18,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:13:18,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 13:13:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:19,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-15 13:13:19,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:13:19,215 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 [2023-02-15 13:13:19,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:13:19,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:13:19,330 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 13:13:19,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 13:13:19,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 13:13:19,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 13:13:19,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 13:13:19,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 13:13:19,410 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 13:13:19,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 13:13:19,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 13:13:19,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 13:13:19,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 13:13:19,463 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 19 treesize of output 18 [2023-02-15 13:13:19,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-15 13:13:19,555 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 13 treesize of output 9 [2023-02-15 13:13:19,902 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:13:19,903 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:13:19,908 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-02-15 13:13:19,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 36 [2023-02-15 13:13:19,913 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:13:19,916 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 13:13:19,916 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2023-02-15 13:13:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:19,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:13:22,464 INFO L321 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2023-02-15 13:13:22,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 73 [2023-02-15 13:13:22,469 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 108 treesize of output 96 [2023-02-15 13:13:22,496 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-15 13:13:22,558 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-15 13:13:22,695 INFO L321 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2023-02-15 13:13:22,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 91 [2023-02-15 13:13:22,700 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 86 treesize of output 78 [2023-02-15 13:13:26,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:26,256 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 41 [2023-02-15 13:13:26,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:26,263 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 269 treesize of output 247 [2023-02-15 13:13:26,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:26,272 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 235 treesize of output 227 [2023-02-15 13:13:26,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:26,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 215 [2023-02-15 13:13:26,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:26,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-02-15 13:13:26,741 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 70 treesize of output 58 [2023-02-15 13:13:26,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-02-15 13:13:26,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:26,755 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 56 treesize of output 54 [2023-02-15 13:13:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:27,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243317748] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:13:27,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:13:27,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 19] total 50 [2023-02-15 13:13:27,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472514392] [2023-02-15 13:13:27,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:13:27,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 13:13:27,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:27,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 13:13:27,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2316, Unknown=5, NotChecked=0, Total=2450 [2023-02-15 13:13:27,121 INFO L87 Difference]: Start difference. First operand 380 states and 420 transitions. Second operand has 50 states, 50 states have (on average 3.06) internal successors, (153), 50 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:35,268 INFO L93 Difference]: Finished difference Result 737 states and 792 transitions. [2023-02-15 13:13:35,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-15 13:13:35,269 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 50 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-15 13:13:35,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:35,270 INFO L225 Difference]: With dead ends: 737 [2023-02-15 13:13:35,270 INFO L226 Difference]: Without dead ends: 733 [2023-02-15 13:13:35,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=832, Invalid=6995, Unknown=5, NotChecked=0, Total=7832 [2023-02-15 13:13:35,272 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 5227 mSDsluCounter, 7004 mSDsCounter, 0 mSdLazyCounter, 4748 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5229 SdHoareTripleChecker+Valid, 7286 SdHoareTripleChecker+Invalid, 4845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 4748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:35,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5229 Valid, 7286 Invalid, 4845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 4748 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-02-15 13:13:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2023-02-15 13:13:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 412. [2023-02-15 13:13:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 325 states have (on average 1.363076923076923) internal successors, (443), 409 states have internal predecessors, (443), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 453 transitions. [2023-02-15 13:13:35,277 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 453 transitions. Word has length 56 [2023-02-15 13:13:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:35,277 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 453 transitions. [2023-02-15 13:13:35,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 50 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 453 transitions. [2023-02-15 13:13:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 13:13:35,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:35,278 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:13:35,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-15 13:13:35,479 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,SelfDestructingSolverStorable43 [2023-02-15 13:13:35,479 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:35,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:35,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1125924296, now seen corresponding path program 1 times [2023-02-15 13:13:35,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:35,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793081134] [2023-02-15 13:13:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:35,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:35,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:35,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793081134] [2023-02-15 13:13:35,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793081134] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:13:35,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:13:35,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:13:35,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343963304] [2023-02-15 13:13:35,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:13:35,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:13:35,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:13:35,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:13:35,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:13:35,517 INFO L87 Difference]: Start difference. First operand 412 states and 453 transitions. Second operand has 4 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:35,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:13:35,588 INFO L93 Difference]: Finished difference Result 521 states and 573 transitions. [2023-02-15 13:13:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:13:35,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2023-02-15 13:13:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:13:35,590 INFO L225 Difference]: With dead ends: 521 [2023-02-15 13:13:35,590 INFO L226 Difference]: Without dead ends: 521 [2023-02-15 13:13:35,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:13:35,590 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 379 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:13:35,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 490 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:13:35,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2023-02-15 13:13:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 425. [2023-02-15 13:13:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 338 states have (on average 1.363905325443787) internal successors, (461), 422 states have internal predecessors, (461), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:13:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 471 transitions. [2023-02-15 13:13:35,596 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 471 transitions. Word has length 57 [2023-02-15 13:13:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:13:35,596 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 471 transitions. [2023-02-15 13:13:35,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:13:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 471 transitions. [2023-02-15 13:13:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 13:13:35,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:13:35,597 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:13:35,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-02-15 13:13:35,597 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:13:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:13:35,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1343539666, now seen corresponding path program 1 times [2023-02-15 13:13:35,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:13:35,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42195706] [2023-02-15 13:13:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:35,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:13:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:36,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:13:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42195706] [2023-02-15 13:13:36,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42195706] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:13:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889171701] [2023-02-15 13:13:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:13:36,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:13:36,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:13:36,477 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:13:36,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 13:13:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:13:36,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-15 13:13:36,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:13:36,666 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 [2023-02-15 13:13:36,697 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 13:13:36,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 13:13:36,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:13:36,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:36,760 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 31 treesize of output 26 [2023-02-15 13:13:36,822 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-02-15 13:13:36,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-02-15 13:13:36,879 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 32 treesize of output 30 [2023-02-15 13:13:36,906 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 32 treesize of output 30 [2023-02-15 13:13:36,975 INFO L321 Elim1Store]: treesize reduction 38, result has 48.6 percent of original size [2023-02-15 13:13:36,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 50 [2023-02-15 13:13:37,104 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:13:37,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2023-02-15 13:13:37,119 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 48 treesize of output 38 [2023-02-15 13:13:37,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:13:37,258 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 99 treesize of output 82 [2023-02-15 13:13:37,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 13:13:38,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 13:13:38,914 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 13:13:38,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 40 [2023-02-15 13:13:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:13:38,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:13:39,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:39,561 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2023-02-15 13:13:42,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:42,052 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 56 [2023-02-15 13:13:42,057 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 324 treesize of output 300 [2023-02-15 13:13:42,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 200 [2023-02-15 13:13:42,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:13:42,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 280 [2023-02-15 13:14:00,813 WARN L233 SmtUtils]: Spent 16.97s on a formula simplification. DAG size of input: 162 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 13:14:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:14:00,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889171701] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:14:00,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:14:00,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 54 [2023-02-15 13:14:00,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97178823] [2023-02-15 13:14:00,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:14:00,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-15 13:14:00,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:14:00,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-15 13:14:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2767, Unknown=9, NotChecked=0, Total=2970 [2023-02-15 13:14:00,995 INFO L87 Difference]: Start difference. First operand 425 states and 471 transitions. Second operand has 55 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 55 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:14:17,014 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 105 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 13:14:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:14:26,071 INFO L93 Difference]: Finished difference Result 824 states and 918 transitions. [2023-02-15 13:14:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 13:14:26,071 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 55 states have internal predecessors, (161), 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 57 [2023-02-15 13:14:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:14:26,073 INFO L225 Difference]: With dead ends: 824 [2023-02-15 13:14:26,073 INFO L226 Difference]: Without dead ends: 824 [2023-02-15 13:14:26,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=1253, Invalid=6031, Unknown=26, NotChecked=0, Total=7310 [2023-02-15 13:14:26,075 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 5264 mSDsluCounter, 5770 mSDsCounter, 0 mSdLazyCounter, 4802 mSolverCounterSat, 114 mSolverCounterUnsat, 60 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5264 SdHoareTripleChecker+Valid, 6060 SdHoareTripleChecker+Invalid, 4976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 4802 IncrementalHoareTripleChecker+Invalid, 60 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:14:26,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5264 Valid, 6060 Invalid, 4976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 4802 Invalid, 60 Unknown, 0 Unchecked, 4.4s Time] [2023-02-15 13:14:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2023-02-15 13:14:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 426. [2023-02-15 13:14:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 339 states have (on average 1.3657817109144543) internal successors, (463), 423 states have internal predecessors, (463), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:14:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 473 transitions. [2023-02-15 13:14:26,080 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 473 transitions. Word has length 57 [2023-02-15 13:14:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:14:26,080 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 473 transitions. [2023-02-15 13:14:26,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 55 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:14:26,080 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 473 transitions. [2023-02-15 13:14:26,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 13:14:26,081 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:14:26,081 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:14:26,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 13:14:26,281 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,SelfDestructingSolverStorable45 [2023-02-15 13:14:26,282 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:14:26,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:14:26,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1343539667, now seen corresponding path program 1 times [2023-02-15 13:14:26,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:14:26,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044064605] [2023-02-15 13:14:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:14:26,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:14:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:14:27,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:14:27,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044064605] [2023-02-15 13:14:27,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044064605] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:14:27,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020852022] [2023-02-15 13:14:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:14:27,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:14:27,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:14:27,577 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:14:27,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 13:14:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:14:27,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-15 13:14:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:14:27,755 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 [2023-02-15 13:14:27,802 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 13:14:27,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 13:14:27,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 13:14:27,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:14:27,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:14:27,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:14:27,874 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 40 treesize of output 31 [2023-02-15 13:14:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:14:27,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 13:14:27,929 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-15 13:14:27,930 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 1 case distinctions, treesize of input 16 treesize of output 26 [2023-02-15 13:14:27,953 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-02-15 13:14:27,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-02-15 13:14:28,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 13:14:28,022 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 41 treesize of output 37 [2023-02-15 13:14:28,054 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 41 treesize of output 37 [2023-02-15 13:14:28,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 13:14:28,078 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-15 13:14:28,079 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 1 case distinctions, treesize of input 16 treesize of output 26 [2023-02-15 13:14:28,093 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-02-15 13:14:28,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 13:14:28,151 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 32 treesize of output 30 [2023-02-15 13:14:28,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 13:14:28,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2023-02-15 13:14:28,178 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 [2023-02-15 13:14:28,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:28,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 45 [2023-02-15 13:14:28,963 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 13:14:28,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-15 13:14:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:14:29,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:14:29,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:29,491 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2023-02-15 13:14:29,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:29,494 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2023-02-15 13:14:29,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:29,503 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2023-02-15 13:14:33,809 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:14:33,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:33,814 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2023-02-15 13:14:33,818 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 60 treesize of output 52 [2023-02-15 13:14:33,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:33,825 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 54 treesize of output 56 [2023-02-15 13:14:33,829 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 22 treesize of output 20 [2023-02-15 13:14:33,918 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:14:33,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:33,923 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 65 [2023-02-15 13:14:33,930 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 192 treesize of output 184 [2023-02-15 13:14:33,935 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:14:33,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:33,941 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 180 treesize of output 146 [2023-02-15 13:14:33,947 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 430 treesize of output 410 [2023-02-15 13:14:33,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:33,958 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 412 treesize of output 402 [2023-02-15 13:14:33,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:14:33,967 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 396 treesize of output 386 [2023-02-15 13:14:33,972 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 190 treesize of output 182 [2023-02-15 13:14:33,976 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 366 treesize of output 358 [2023-02-15 13:14:43,155 WARN L233 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 201 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 13:14:48,105 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 306 treesize of output 300 [2023-02-15 13:14:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:14:48,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020852022] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:14:48,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:14:48,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 19] total 51 [2023-02-15 13:14:48,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242143875] [2023-02-15 13:14:48,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:14:48,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 13:14:48,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:14:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 13:14:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2473, Unknown=4, NotChecked=0, Total=2652 [2023-02-15 13:14:48,843 INFO L87 Difference]: Start difference. First operand 426 states and 473 transitions. Second operand has 52 states, 51 states have (on average 3.235294117647059) internal successors, (165), 52 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:15:00,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:15:00,851 INFO L93 Difference]: Finished difference Result 846 states and 918 transitions. [2023-02-15 13:15:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 13:15:00,852 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.235294117647059) internal successors, (165), 52 states have internal predecessors, (165), 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 57 [2023-02-15 13:15:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:15:00,853 INFO L225 Difference]: With dead ends: 846 [2023-02-15 13:15:00,854 INFO L226 Difference]: Without dead ends: 846 [2023-02-15 13:15:00,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1389, Invalid=6089, Unknown=4, NotChecked=0, Total=7482 [2023-02-15 13:15:00,855 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 5466 mSDsluCounter, 3908 mSDsCounter, 0 mSdLazyCounter, 5248 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5466 SdHoareTripleChecker+Valid, 4118 SdHoareTripleChecker+Invalid, 5371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 5248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:15:00,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5466 Valid, 4118 Invalid, 5371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 5248 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-02-15 13:15:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2023-02-15 13:15:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 426. [2023-02-15 13:15:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 339 states have (on average 1.3628318584070795) internal successors, (462), 423 states have internal predecessors, (462), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 13:15:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 472 transitions. [2023-02-15 13:15:00,861 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 472 transitions. Word has length 57 [2023-02-15 13:15:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:15:00,861 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 472 transitions. [2023-02-15 13:15:00,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.235294117647059) internal successors, (165), 52 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:15:00,862 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 472 transitions. [2023-02-15 13:15:00,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 13:15:00,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:15:00,862 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:15:00,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 13:15:01,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-15 13:15:01,068 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:15:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:15:01,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2019740316, now seen corresponding path program 1 times [2023-02-15 13:15:01,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:15:01,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846168950] [2023-02-15 13:15:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:01,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:15:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 13:15:01,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:15:01,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846168950] [2023-02-15 13:15:01,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846168950] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:15:01,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:15:01,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 13:15:01,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753930639] [2023-02-15 13:15:01,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:15:01,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 13:15:01,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:15:01,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 13:15:01,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:15:01,167 INFO L87 Difference]: Start difference. First operand 426 states and 472 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:15:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:15:01,619 INFO L93 Difference]: Finished difference Result 1017 states and 1115 transitions. [2023-02-15 13:15:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 13:15:01,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-02-15 13:15:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:15:01,622 INFO L225 Difference]: With dead ends: 1017 [2023-02-15 13:15:01,622 INFO L226 Difference]: Without dead ends: 1017 [2023-02-15 13:15:01,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2023-02-15 13:15:01,623 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 1805 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:15:01,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1807 Valid, 2458 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:15:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2023-02-15 13:15:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 479. [2023-02-15 13:15:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 390 states have (on average 1.4256410256410257) internal successors, (556), 476 states have internal predecessors, (556), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:15:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 570 transitions. [2023-02-15 13:15:01,634 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 570 transitions. Word has length 60 [2023-02-15 13:15:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:15:01,635 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 570 transitions. [2023-02-15 13:15:01,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:15:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 570 transitions. [2023-02-15 13:15:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 13:15:01,635 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:15:01,635 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:15:01,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-02-15 13:15:01,636 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:15:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:15:01,636 INFO L85 PathProgramCache]: Analyzing trace with hash 590188247, now seen corresponding path program 1 times [2023-02-15 13:15:01,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:15:01,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121392784] [2023-02-15 13:15:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:01,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:15:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:03,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:15:03,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121392784] [2023-02-15 13:15:03,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121392784] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:15:03,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150917118] [2023-02-15 13:15:03,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:15:03,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:15:03,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:15:03,437 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:15:03,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 13:15:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:15:03,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 100 conjunts are in the unsatisfiable core [2023-02-15 13:15:03,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:15:03,616 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 [2023-02-15 13:15:03,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:15:03,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:15:03,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:03,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 13:15:03,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:03,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 13:15:03,666 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 13:15:03,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 13:15:03,722 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 19 treesize of output 18 [2023-02-15 13:15:03,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-15 13:15:03,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:03,744 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2023-02-15 13:15:03,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:03,748 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 13:15:03,749 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 1 case distinctions, treesize of input 53 treesize of output 46 [2023-02-15 13:15:03,825 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-02-15 13:15:03,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-02-15 13:15:03,898 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 13:15:03,898 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 62 treesize of output 62 [2023-02-15 13:15:03,906 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 44 treesize of output 45 [2023-02-15 13:15:03,935 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 13:15:03,935 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 62 treesize of output 62 [2023-02-15 13:15:03,941 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 44 treesize of output 45 [2023-02-15 13:15:03,961 INFO L321 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2023-02-15 13:15:03,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 29 [2023-02-15 13:15:04,058 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-02-15 13:15:04,058 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 55 [2023-02-15 13:15:04,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2023-02-15 13:15:04,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:04,171 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-15 13:15:04,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 72 [2023-02-15 13:15:04,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:15:04,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2023-02-15 13:15:05,135 INFO L321 Elim1Store]: treesize reduction 97, result has 10.2 percent of original size [2023-02-15 13:15:05,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 168 treesize of output 86 [2023-02-15 13:15:05,151 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2023-02-15 13:15:05,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2023-02-15 13:15:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:05,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:15:05,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:15:05,494 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2023-02-15 13:15:05,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:15:05,501 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 53 [2023-02-15 13:15:38,705 INFO L321 Elim1Store]: treesize reduction 114, result has 28.3 percent of original size [2023-02-15 13:15:38,705 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 163 [2023-02-15 13:15:38,711 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:38,817 INFO L321 Elim1Store]: treesize reduction 119, result has 25.2 percent of original size [2023-02-15 13:15:38,817 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 118 treesize of output 84 [2023-02-15 13:15:38,821 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:38,822 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:38,857 INFO L321 Elim1Store]: treesize reduction 72, result has 5.3 percent of original size [2023-02-15 13:15:38,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 508 treesize of output 426 [2023-02-15 13:15:38,863 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:38,863 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:38,864 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:38,879 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-02-15 13:15:38,880 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 183 treesize of output 119 [2023-02-15 13:15:38,886 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 53 treesize of output 49 [2023-02-15 13:15:38,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:15:38,897 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 108 treesize of output 106 [2023-02-15 13:15:39,266 INFO L321 Elim1Store]: treesize reduction 109, result has 31.4 percent of original size [2023-02-15 13:15:39,267 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 253 [2023-02-15 13:15:39,273 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:39,359 INFO L321 Elim1Store]: treesize reduction 95, result has 40.3 percent of original size [2023-02-15 13:15:39,359 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 119 [2023-02-15 13:15:39,364 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:39,364 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:39,390 INFO L321 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-02-15 13:15:39,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 81 [2023-02-15 13:15:39,394 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:39,395 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:39,396 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:39,398 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:15:39,436 INFO L321 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2023-02-15 13:15:39,436 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 151 treesize of output 149 [2023-02-15 13:15:39,444 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 36 treesize of output 34 [2023-02-15 13:15:39,491 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-15 13:15:39,511 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 44 treesize of output 36 [2023-02-15 13:15:39,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:15:39,547 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 96 treesize of output 96 [2023-02-15 13:15:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:15:48,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150917118] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:15:48,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:15:48,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 21] total 52 [2023-02-15 13:15:48,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081421353] [2023-02-15 13:15:48,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:15:48,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 13:15:48,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:15:48,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 13:15:48,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2457, Unknown=21, NotChecked=0, Total=2652 [2023-02-15 13:15:48,441 INFO L87 Difference]: Start difference. First operand 479 states and 570 transitions. Second operand has 52 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:16:25,096 INFO L93 Difference]: Finished difference Result 762 states and 855 transitions. [2023-02-15 13:16:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 13:16:25,096 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-02-15 13:16:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:16:25,098 INFO L225 Difference]: With dead ends: 762 [2023-02-15 13:16:25,098 INFO L226 Difference]: Without dead ends: 762 [2023-02-15 13:16:25,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 61.6s TimeCoverageRelationStatistics Valid=1059, Invalid=5240, Unknown=21, NotChecked=0, Total=6320 [2023-02-15 13:16:25,100 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 4646 mSDsluCounter, 5827 mSDsCounter, 0 mSdLazyCounter, 4618 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4648 SdHoareTripleChecker+Valid, 6080 SdHoareTripleChecker+Invalid, 4675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 4618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:16:25,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4648 Valid, 6080 Invalid, 4675 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 4618 Invalid, 0 Unknown, 0 Unchecked, 17.4s Time] [2023-02-15 13:16:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2023-02-15 13:16:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 480. [2023-02-15 13:16:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 391 states have (on average 1.4245524296675192) internal successors, (557), 477 states have internal predecessors, (557), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:16:25,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 571 transitions. [2023-02-15 13:16:25,107 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 571 transitions. Word has length 60 [2023-02-15 13:16:25,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:16:25,107 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 571 transitions. [2023-02-15 13:16:25,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:25,107 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 571 transitions. [2023-02-15 13:16:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 13:16:25,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:16:25,108 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:16:25,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 13:16:25,314 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,SelfDestructingSolverStorable48 [2023-02-15 13:16:25,315 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:16:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:16:25,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1283333183, now seen corresponding path program 1 times [2023-02-15 13:16:25,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:16:25,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373562152] [2023-02-15 13:16:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:25,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:16:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:16:25,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:16:25,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373562152] [2023-02-15 13:16:25,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373562152] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:16:25,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:16:25,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 13:16:25,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020247400] [2023-02-15 13:16:25,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:16:25,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 13:16:25,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:16:25,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 13:16:25,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:16:25,914 INFO L87 Difference]: Start difference. First operand 480 states and 571 transitions. Second operand has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:16:29,176 INFO L93 Difference]: Finished difference Result 609 states and 697 transitions. [2023-02-15 13:16:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 13:16:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 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 60 [2023-02-15 13:16:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:16:29,178 INFO L225 Difference]: With dead ends: 609 [2023-02-15 13:16:29,178 INFO L226 Difference]: Without dead ends: 609 [2023-02-15 13:16:29,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2023-02-15 13:16:29,179 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1074 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:16:29,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1076 Valid, 1010 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-15 13:16:29,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2023-02-15 13:16:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 489. [2023-02-15 13:16:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 401 states have (on average 1.4164588528678304) internal successors, (568), 486 states have internal predecessors, (568), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:16:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 582 transitions. [2023-02-15 13:16:29,184 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 582 transitions. Word has length 60 [2023-02-15 13:16:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:16:29,184 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 582 transitions. [2023-02-15 13:16:29,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:29,184 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 582 transitions. [2023-02-15 13:16:29,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 13:16:29,185 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:16:29,185 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:16:29,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-02-15 13:16:29,185 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr85REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:16:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:16:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1283333182, now seen corresponding path program 1 times [2023-02-15 13:16:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:16:29,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339919719] [2023-02-15 13:16:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:29,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:16:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:16:29,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:16:29,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339919719] [2023-02-15 13:16:29,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339919719] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:16:29,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:16:29,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 13:16:29,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78459037] [2023-02-15 13:16:29,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:16:29,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 13:16:29,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:16:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 13:16:29,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-15 13:16:29,668 INFO L87 Difference]: Start difference. First operand 489 states and 582 transitions. Second operand has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:16:31,623 INFO L93 Difference]: Finished difference Result 543 states and 631 transitions. [2023-02-15 13:16:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 13:16:31,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 10 states have internal predecessors, (60), 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 60 [2023-02-15 13:16:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:16:31,625 INFO L225 Difference]: With dead ends: 543 [2023-02-15 13:16:31,625 INFO L226 Difference]: Without dead ends: 543 [2023-02-15 13:16:31,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-02-15 13:16:31,625 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 741 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 13:16:31,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 1018 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 13:16:31,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-02-15 13:16:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 491. [2023-02-15 13:16:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 403 states have (on average 1.411910669975186) internal successors, (569), 488 states have internal predecessors, (569), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:16:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 583 transitions. [2023-02-15 13:16:31,630 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 583 transitions. Word has length 60 [2023-02-15 13:16:31,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:16:31,631 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 583 transitions. [2023-02-15 13:16:31,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:31,631 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 583 transitions. [2023-02-15 13:16:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 13:16:31,631 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:16:31,631 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:16:31,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-02-15 13:16:31,632 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:16:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:16:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2019739106, now seen corresponding path program 1 times [2023-02-15 13:16:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:16:31,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680212243] [2023-02-15 13:16:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:31,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:16:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 13:16:32,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:16:32,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680212243] [2023-02-15 13:16:32,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680212243] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:16:32,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:16:32,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:16:32,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015756620] [2023-02-15 13:16:32,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:16:32,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:16:32,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:16:32,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:16:32,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:16:32,034 INFO L87 Difference]: Start difference. First operand 491 states and 583 transitions. Second operand has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:16:34,439 INFO L93 Difference]: Finished difference Result 535 states and 616 transitions. [2023-02-15 13:16:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 13:16:34,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 8 states have internal predecessors, (53), 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 60 [2023-02-15 13:16:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:16:34,441 INFO L225 Difference]: With dead ends: 535 [2023-02-15 13:16:34,441 INFO L226 Difference]: Without dead ends: 535 [2023-02-15 13:16:34,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-02-15 13:16:34,441 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 427 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:16:34,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 950 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-15 13:16:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2023-02-15 13:16:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 491. [2023-02-15 13:16:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 403 states have (on average 1.4044665012406947) internal successors, (566), 488 states have internal predecessors, (566), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:16:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 580 transitions. [2023-02-15 13:16:34,447 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 580 transitions. Word has length 60 [2023-02-15 13:16:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:16:34,447 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 580 transitions. [2023-02-15 13:16:34,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 580 transitions. [2023-02-15 13:16:34,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-15 13:16:34,448 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:16:34,449 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:16:34,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-02-15 13:16:34,449 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:16:34,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:16:34,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1128624014, now seen corresponding path program 1 times [2023-02-15 13:16:34,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:16:34,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645066521] [2023-02-15 13:16:34,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:34,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:16:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:16:34,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:16:34,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645066521] [2023-02-15 13:16:34,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645066521] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:16:34,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:16:34,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 13:16:34,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162895049] [2023-02-15 13:16:34,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:16:34,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 13:16:34,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:16:34,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 13:16:34,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-15 13:16:34,933 INFO L87 Difference]: Start difference. First operand 491 states and 580 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:16:36,792 INFO L93 Difference]: Finished difference Result 540 states and 625 transitions. [2023-02-15 13:16:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:16:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 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 61 [2023-02-15 13:16:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:16:36,793 INFO L225 Difference]: With dead ends: 540 [2023-02-15 13:16:36,793 INFO L226 Difference]: Without dead ends: 540 [2023-02-15 13:16:36,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-02-15 13:16:36,794 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 779 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 13:16:36,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 1661 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 13:16:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-02-15 13:16:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 491. [2023-02-15 13:16:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 403 states have (on average 1.401985111662531) internal successors, (565), 488 states have internal predecessors, (565), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:16:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 579 transitions. [2023-02-15 13:16:36,799 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 579 transitions. Word has length 61 [2023-02-15 13:16:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:16:36,799 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 579 transitions. [2023-02-15 13:16:36,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 579 transitions. [2023-02-15 13:16:36,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 13:16:36,799 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:16:36,799 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 13:16:36,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-02-15 13:16:36,799 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:16:36,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:16:36,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1978870945, now seen corresponding path program 1 times [2023-02-15 13:16:36,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:16:36,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919418548] [2023-02-15 13:16:36,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:36,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:16:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 13:16:37,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:16:37,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919418548] [2023-02-15 13:16:37,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919418548] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:16:37,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557623981] [2023-02-15 13:16:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:37,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:16:37,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:16:37,643 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:16:37,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 13:16:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:37,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 13:16:37,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:16:38,089 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 13 treesize of output 9 [2023-02-15 13:16:38,381 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 20 treesize of output 8 [2023-02-15 13:16:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 13:16:38,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:16:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 13:16:39,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557623981] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:16:39,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:16:39,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2023-02-15 13:16:39,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946116485] [2023-02-15 13:16:39,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:16:39,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 13:16:39,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:16:39,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 13:16:39,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-02-15 13:16:39,163 INFO L87 Difference]: Start difference. First operand 491 states and 579 transitions. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:16:43,262 INFO L93 Difference]: Finished difference Result 640 states and 766 transitions. [2023-02-15 13:16:43,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 13:16:43,263 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 states have internal predecessors, (112), 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 62 [2023-02-15 13:16:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:16:43,264 INFO L225 Difference]: With dead ends: 640 [2023-02-15 13:16:43,264 INFO L226 Difference]: Without dead ends: 640 [2023-02-15 13:16:43,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 13:16:43,265 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 1851 mSDsluCounter, 2804 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1851 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-02-15 13:16:43,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1851 Valid, 3048 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-02-15 13:16:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2023-02-15 13:16:43,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 472. [2023-02-15 13:16:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 384 states have (on average 1.4140625) internal successors, (543), 469 states have internal predecessors, (543), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:16:43,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 557 transitions. [2023-02-15 13:16:43,269 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 557 transitions. Word has length 62 [2023-02-15 13:16:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:16:43,270 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 557 transitions. [2023-02-15 13:16:43,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:43,270 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 557 transitions. [2023-02-15 13:16:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 13:16:43,270 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:16:43,270 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:16:43,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 13:16:43,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:16:43,477 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr87ASSERT_VIOLATIONMEMORY_FREE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:16:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:16:43,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2020513782, now seen corresponding path program 1 times [2023-02-15 13:16:43,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:16:43,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459076022] [2023-02-15 13:16:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:43,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:16:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:16:43,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:16:43,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459076022] [2023-02-15 13:16:43,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459076022] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:16:43,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:16:43,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:16:43,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914412914] [2023-02-15 13:16:43,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:16:43,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:16:43,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:16:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:16:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:16:43,799 INFO L87 Difference]: Start difference. First operand 472 states and 557 transitions. Second operand has 8 states, 7 states have (on average 9.0) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:16:45,293 INFO L93 Difference]: Finished difference Result 529 states and 611 transitions. [2023-02-15 13:16:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 13:16:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 8 states have internal predecessors, (63), 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 63 [2023-02-15 13:16:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:16:45,294 INFO L225 Difference]: With dead ends: 529 [2023-02-15 13:16:45,294 INFO L226 Difference]: Without dead ends: 529 [2023-02-15 13:16:45,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2023-02-15 13:16:45,295 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 734 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:16:45,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 889 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 13:16:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2023-02-15 13:16:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 478. [2023-02-15 13:16:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 390 states have (on average 1.417948717948718) internal successors, (553), 475 states have internal predecessors, (553), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:16:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 567 transitions. [2023-02-15 13:16:45,299 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 567 transitions. Word has length 63 [2023-02-15 13:16:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:16:45,299 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 567 transitions. [2023-02-15 13:16:45,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 567 transitions. [2023-02-15 13:16:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 13:16:45,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:16:45,300 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:16:45,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-02-15 13:16:45,300 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:16:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:16:45,302 INFO L85 PathProgramCache]: Analyzing trace with hash -840009178, now seen corresponding path program 1 times [2023-02-15 13:16:45,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:16:45,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945933622] [2023-02-15 13:16:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:45,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:16:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:16:46,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:16:46,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945933622] [2023-02-15 13:16:46,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945933622] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:16:46,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972852979] [2023-02-15 13:16:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:46,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:16:46,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:16:46,394 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:16:46,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 13:16:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:46,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 13:16:46,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:16:48,055 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2023-02-15 13:16:48,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 47 [2023-02-15 13:16:48,101 INFO L321 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2023-02-15 13:16:48,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2023-02-15 13:16:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:16:48,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:16:50,955 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2023-02-15 13:16:50,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 133 [2023-02-15 13:16:51,114 INFO L321 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2023-02-15 13:16:51,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 100 [2023-02-15 13:16:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:16:52,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972852979] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:16:52,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:16:52,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 32 [2023-02-15 13:16:52,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9357888] [2023-02-15 13:16:52,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:16:52,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 13:16:52,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:16:52,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 13:16:52,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2023-02-15 13:16:52,221 INFO L87 Difference]: Start difference. First operand 478 states and 567 transitions. Second operand has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:16:58,128 INFO L93 Difference]: Finished difference Result 515 states and 600 transitions. [2023-02-15 13:16:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 13:16:58,128 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 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 66 [2023-02-15 13:16:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:16:58,129 INFO L225 Difference]: With dead ends: 515 [2023-02-15 13:16:58,129 INFO L226 Difference]: Without dead ends: 515 [2023-02-15 13:16:58,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 13:16:58,129 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 824 mSDsluCounter, 2888 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 3084 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:16:58,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 3084 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-02-15 13:16:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-02-15 13:16:58,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 481. [2023-02-15 13:16:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 393 states have (on average 1.4147582697201018) internal successors, (556), 478 states have internal predecessors, (556), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:16:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 570 transitions. [2023-02-15 13:16:58,134 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 570 transitions. Word has length 66 [2023-02-15 13:16:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:16:58,134 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 570 transitions. [2023-02-15 13:16:58,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:16:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 570 transitions. [2023-02-15 13:16:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 13:16:58,135 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:16:58,135 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 13:16:58,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 13:16:58,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:16:58,335 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-02-15 13:16:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:16:58,336 INFO L85 PathProgramCache]: Analyzing trace with hash -270481747, now seen corresponding path program 1 times [2023-02-15 13:16:58,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:16:58,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804519293] [2023-02-15 13:16:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:58,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:16:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:16:59,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:16:59,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804519293] [2023-02-15 13:16:59,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804519293] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:16:59,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025244971] [2023-02-15 13:16:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:16:59,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:16:59,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:16:59,231 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:16:59,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 13:16:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:16:59,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 13:16:59,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:16:59,525 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 13:16:59,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 32 [2023-02-15 13:16:59,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 13:16:59,768 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 [2023-02-15 13:17:00,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:17:00,713 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 38 treesize of output 30 [2023-02-15 13:17:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:17:01,925 INFO L328 TraceCheckSpWp]: Computing backward predicates...