./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.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 246cd07a930f0cb8d777c2eae74f25d04e3267c275b813f0c0f5232c23299340 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:02:46,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:02:46,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:02:46,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:02:46,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:02:46,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:02:46,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:02:46,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:02:46,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:02:46,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:02:46,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:02:46,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:02:46,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:02:46,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:02:46,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:02:46,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:02:46,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:02:46,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:02:46,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:02:46,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:02:46,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:02:46,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:02:46,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:02:46,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:02:46,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:02:46,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:02:46,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:02:46,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:02:46,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:02:46,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:02:46,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:02:46,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:02:46,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:02:46,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:02:46,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:02:46,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:02:46,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:02:46,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:02:46,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:02:46,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:02:46,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:02:46,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:02:46,435 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:02:46,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:02:46,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:02:46,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:02:46,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:02:46,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:02:46,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:02:46,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:02:46,438 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:02:46,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:02:46,439 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:02:46,439 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:02:46,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:02:46,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:02:46,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:02:46,440 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:02:46,440 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:02:46,440 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:02:46,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:02:46,441 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:02:46,441 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:02:46,441 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:02:46,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:02:46,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:02:46,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:02:46,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:02:46,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:02:46,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:02:46,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:02:46,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:02:46,443 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:02:46,443 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:02:46,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:02:46,444 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:02:46,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246cd07a930f0cb8d777c2eae74f25d04e3267c275b813f0c0f5232c23299340 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:02:46,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:02:46,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:02:46,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:02:46,745 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:02:46,746 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:02:46,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i [2023-08-29 22:02:47,822 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:02:48,118 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:02:48,118 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i [2023-08-29 22:02:48,139 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e400e5a1/a5547476c07c426899e05cb4076ef5d0/FLAG1103edb7d [2023-08-29 22:02:48,157 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e400e5a1/a5547476c07c426899e05cb4076ef5d0 [2023-08-29 22:02:48,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:02:48,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:02:48,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:02:48,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:02:48,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:02:48,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e19c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48, skipping insertion in model container [2023-08-29 22:02:48,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:02:48,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:02:48,593 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i[47038,47051] [2023-08-29 22:02:48,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:02:48,629 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:02:48,659 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i[47038,47051] [2023-08-29 22:02:48,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:02:48,718 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:02:48,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48 WrapperNode [2023-08-29 22:02:48,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:02:48,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:02:48,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:02:48,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:02:48,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,762 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 204 [2023-08-29 22:02:48,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:02:48,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:02:48,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:02:48,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:02:48,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,819 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:02:48,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:02:48,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:02:48,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:02:48,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48" (1/1) ... [2023-08-29 22:02:48,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:02:48,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:02:48,866 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) [2023-08-29 22:02:48,872 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 [2023-08-29 22:02:48,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:02:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:02:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 22:02:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 22:02:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 22:02:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:02:48,903 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 22:02:48,904 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 22:02:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 22:02:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:02:48,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:02:48,905 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:02:49,099 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:02:49,101 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:02:49,482 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:02:49,500 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:02:49,500 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-08-29 22:02:49,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:02:49 BoogieIcfgContainer [2023-08-29 22:02:49,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:02:49,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:02:49,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:02:49,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:02:49,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:02:48" (1/3) ... [2023-08-29 22:02:49,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e82a1ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:02:49, skipping insertion in model container [2023-08-29 22:02:49,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:02:48" (2/3) ... [2023-08-29 22:02:49,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e82a1ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:02:49, skipping insertion in model container [2023-08-29 22:02:49,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:02:49" (3/3) ... [2023-08-29 22:02:49,509 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_78-equ_racing.i [2023-08-29 22:02:49,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:02:49,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-08-29 22:02:49,524 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:02:49,608 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 22:02:49,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 229 transitions, 466 flow [2023-08-29 22:02:49,785 INFO L130 PetriNetUnfolder]: 43/316 cut-off events. [2023-08-29 22:02:49,786 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 22:02:49,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 316 events. 43/316 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1168 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-08-29 22:02:49,793 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 229 transitions, 466 flow [2023-08-29 22:02:49,802 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 229 transitions, 466 flow [2023-08-29 22:02:49,805 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:02:49,827 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 229 transitions, 466 flow [2023-08-29 22:02:49,830 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 229 transitions, 466 flow [2023-08-29 22:02:49,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 229 transitions, 466 flow [2023-08-29 22:02:49,884 INFO L130 PetriNetUnfolder]: 43/316 cut-off events. [2023-08-29 22:02:49,884 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 22:02:49,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 316 events. 43/316 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1168 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-08-29 22:02:49,894 INFO L119 LiptonReduction]: Number of co-enabled transitions 12462 [2023-08-29 22:02:57,018 INFO L134 LiptonReduction]: Checked pairs total: 29978 [2023-08-29 22:02:57,019 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-29 22:02:57,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:02:57,035 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;@57feee0f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:02:57,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-29 22:02:57,038 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 22:02:57,038 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:02:57,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:02:57,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:02:57,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:02:57,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:02:57,044 INFO L85 PathProgramCache]: Analyzing trace with hash 27925, now seen corresponding path program 1 times [2023-08-29 22:02:57,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:02:57,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490363595] [2023-08-29 22:02:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:02:57,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:02:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:02:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:02:57,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:02:57,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490363595] [2023-08-29 22:02:57,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490363595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:02:57,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:02:57,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:02:57,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165106563] [2023-08-29 22:02:57,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:02:57,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:02:57,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:02:57,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:02:57,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:02:57,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 443 [2023-08-29 22:02:57,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 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) [2023-08-29 22:02:57,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:02:57,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 443 [2023-08-29 22:02:57,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:02:57,629 INFO L130 PetriNetUnfolder]: 602/1372 cut-off events. [2023-08-29 22:02:57,629 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 22:02:57,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2564 conditions, 1372 events. 602/1372 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9227 event pairs, 532 based on Foata normal form. 102/963 useless extension candidates. Maximal degree in co-relation 2481. Up to 1143 conditions per place. [2023-08-29 22:02:57,637 INFO L137 encePairwiseOnDemand]: 413/443 looper letters, 67 selfloop transitions, 1 changer transitions 5/86 dead transitions. [2023-08-29 22:02:57,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 326 flow [2023-08-29 22:02:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:02:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:02:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 698 transitions. [2023-08-29 22:02:57,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252069224981188 [2023-08-29 22:02:57,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 698 transitions. [2023-08-29 22:02:57,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 698 transitions. [2023-08-29 22:02:57,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:02:57,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 698 transitions. [2023-08-29 22:02:57,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 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) [2023-08-29 22:02:57,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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) [2023-08-29 22:02:57,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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) [2023-08-29 22:02:57,674 INFO L175 Difference]: Start difference. First operand has 71 places, 93 transitions, 194 flow. Second operand 3 states and 698 transitions. [2023-08-29 22:02:57,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 326 flow [2023-08-29 22:02:57,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:02:57,680 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 143 flow [2023-08-29 22:02:57,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2023-08-29 22:02:57,685 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-08-29 22:02:57,685 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 143 flow [2023-08-29 22:02:57,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 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) [2023-08-29 22:02:57,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:02:57,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:02:57,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 22:02:57,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:02:57,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:02:57,695 INFO L85 PathProgramCache]: Analyzing trace with hash 28187, now seen corresponding path program 1 times [2023-08-29 22:02:57,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:02:57,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547049120] [2023-08-29 22:02:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:02:57,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:02:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:02:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:02:57,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:02:57,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547049120] [2023-08-29 22:02:57,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547049120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:02:57,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:02:57,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:02:57,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302911250] [2023-08-29 22:02:57,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:02:57,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:02:57,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:02:57,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:02:57,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:02:57,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 443 [2023-08-29 22:02:57,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 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) [2023-08-29 22:02:57,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:02:57,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 443 [2023-08-29 22:02:57,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:02:58,111 INFO L130 PetriNetUnfolder]: 540/1255 cut-off events. [2023-08-29 22:02:58,112 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-29 22:02:58,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2369 conditions, 1255 events. 540/1255 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8458 event pairs, 456 based on Foata normal form. 0/834 useless extension candidates. Maximal degree in co-relation 2291. Up to 982 conditions per place. [2023-08-29 22:02:58,117 INFO L137 encePairwiseOnDemand]: 439/443 looper letters, 66 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-29 22:02:58,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 313 flow [2023-08-29 22:02:58,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:02:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:02:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-08-29 22:02:58,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48833709556057187 [2023-08-29 22:02:58,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-08-29 22:02:58,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-08-29 22:02:58,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:02:58,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-08-29 22:02:58,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 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) [2023-08-29 22:02:58,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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) [2023-08-29 22:02:58,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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) [2023-08-29 22:02:58,126 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 143 flow. Second operand 3 states and 649 transitions. [2023-08-29 22:02:58,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 313 flow [2023-08-29 22:02:58,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 309 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 22:02:58,129 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 139 flow [2023-08-29 22:02:58,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2023-08-29 22:02:58,130 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-08-29 22:02:58,131 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 139 flow [2023-08-29 22:02:58,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 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) [2023-08-29 22:02:58,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:02:58,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:02:58,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 22:02:58,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:02:58,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:02:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash 28186, now seen corresponding path program 1 times [2023-08-29 22:02:58,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:02:58,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811407121] [2023-08-29 22:02:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:02:58,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:02:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:02:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:02:58,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:02:58,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811407121] [2023-08-29 22:02:58,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811407121] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:02:58,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:02:58,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:02:58,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956337874] [2023-08-29 22:02:58,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:02:58,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:02:58,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:02:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:02:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:02:58,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 443 [2023-08-29 22:02:58,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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) [2023-08-29 22:02:58,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:02:58,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 443 [2023-08-29 22:02:58,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:02:58,489 INFO L130 PetriNetUnfolder]: 540/1209 cut-off events. [2023-08-29 22:02:58,490 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 22:02:58,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2306 conditions, 1209 events. 540/1209 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8053 event pairs, 375 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 2267. Up to 1021 conditions per place. [2023-08-29 22:02:58,495 INFO L137 encePairwiseOnDemand]: 439/443 looper letters, 67 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-29 22:02:58,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 317 flow [2023-08-29 22:02:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:02:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:02:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-08-29 22:02:58,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4958615500376223 [2023-08-29 22:02:58,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-08-29 22:02:58,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-08-29 22:02:58,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:02:58,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-08-29 22:02:58,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 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) [2023-08-29 22:02:58,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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) [2023-08-29 22:02:58,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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) [2023-08-29 22:02:58,508 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 139 flow. Second operand 3 states and 659 transitions. [2023-08-29 22:02:58,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 317 flow [2023-08-29 22:02:58,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:02:58,512 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 145 flow [2023-08-29 22:02:58,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2023-08-29 22:02:58,514 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2023-08-29 22:02:58,514 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 145 flow [2023-08-29 22:02:58,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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) [2023-08-29 22:02:58,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:02:58,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:02:58,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 22:02:58,515 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:02:58,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:02:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash 840389113, now seen corresponding path program 1 times [2023-08-29 22:02:58,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:02:58,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382812174] [2023-08-29 22:02:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:02:58,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:02:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:02:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:02:58,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:02:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382812174] [2023-08-29 22:02:58,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382812174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:02:58,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160306706] [2023-08-29 22:02:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:02:58,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:02:58,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:02:58,649 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) [2023-08-29 22:02:58,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 22:02:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:02:58,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:02:58,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:02:58,932 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 0 case distinctions, treesize of input 120 treesize of output 116 [2023-08-29 22:02:58,958 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 0 case distinctions, treesize of input 110 treesize of output 110 [2023-08-29 22:02:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:02:59,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:02:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:02:59,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160306706] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:02:59,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:02:59,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 6 [2023-08-29 22:02:59,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316836543] [2023-08-29 22:02:59,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:02:59,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:02:59,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:02:59,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:02:59,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:02:59,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 443 [2023-08-29 22:02:59,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 145 flow. Second operand has 8 states, 8 states have (on average 194.5) internal successors, (1556), 8 states have internal predecessors, (1556), 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) [2023-08-29 22:02:59,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:02:59,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 443 [2023-08-29 22:02:59,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:02:59,641 INFO L130 PetriNetUnfolder]: 518/1186 cut-off events. [2023-08-29 22:02:59,645 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 22:02:59,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2289 conditions, 1186 events. 518/1186 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8029 event pairs, 220 based on Foata normal form. 0/825 useless extension candidates. Maximal degree in co-relation 2240. Up to 901 conditions per place. [2023-08-29 22:02:59,651 INFO L137 encePairwiseOnDemand]: 439/443 looper letters, 84 selfloop transitions, 3 changer transitions 0/101 dead transitions. [2023-08-29 22:02:59,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 393 flow [2023-08-29 22:02:59,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:02:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:02:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 860 transitions. [2023-08-29 22:02:59,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853273137697517 [2023-08-29 22:02:59,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 860 transitions. [2023-08-29 22:02:59,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 860 transitions. [2023-08-29 22:02:59,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:02:59,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 860 transitions. [2023-08-29 22:02:59,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 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) [2023-08-29 22:02:59,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 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) [2023-08-29 22:02:59,660 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 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) [2023-08-29 22:02:59,661 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 145 flow. Second operand 4 states and 860 transitions. [2023-08-29 22:02:59,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 393 flow [2023-08-29 22:02:59,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 389 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:02:59,664 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 143 flow [2023-08-29 22:02:59,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-08-29 22:02:59,665 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2023-08-29 22:02:59,666 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 143 flow [2023-08-29 22:02:59,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.5) internal successors, (1556), 8 states have internal predecessors, (1556), 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) [2023-08-29 22:02:59,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:02:59,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:02:59,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 22:02:59,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:02:59,872 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:02:59,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:02:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash 282236111, now seen corresponding path program 1 times [2023-08-29 22:02:59,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:02:59,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728468339] [2023-08-29 22:02:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:02:59,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:02:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:00,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:00,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728468339] [2023-08-29 22:03:00,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728468339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:00,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:00,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:00,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243359402] [2023-08-29 22:03:00,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:00,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:00,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:00,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:00,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:00,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 443 [2023-08-29 22:03:00,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 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) [2023-08-29 22:03:00,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:00,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 443 [2023-08-29 22:03:00,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:00,314 INFO L130 PetriNetUnfolder]: 440/1008 cut-off events. [2023-08-29 22:03:00,314 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-29 22:03:00,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 1008 events. 440/1008 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6497 event pairs, 368 based on Foata normal form. 26/766 useless extension candidates. Maximal degree in co-relation 1923. Up to 782 conditions per place. [2023-08-29 22:03:00,318 INFO L137 encePairwiseOnDemand]: 438/443 looper letters, 59 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-29 22:03:00,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 75 transitions, 291 flow [2023-08-29 22:03:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 839 transitions. [2023-08-29 22:03:00,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734762979683973 [2023-08-29 22:03:00,321 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 839 transitions. [2023-08-29 22:03:00,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 839 transitions. [2023-08-29 22:03:00,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:00,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 839 transitions. [2023-08-29 22:03:00,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 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) [2023-08-29 22:03:00,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 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) [2023-08-29 22:03:00,327 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 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) [2023-08-29 22:03:00,327 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 143 flow. Second operand 4 states and 839 transitions. [2023-08-29 22:03:00,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 75 transitions, 291 flow [2023-08-29 22:03:00,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 75 transitions, 285 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:03:00,331 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 135 flow [2023-08-29 22:03:00,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-29 22:03:00,333 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-29 22:03:00,333 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 135 flow [2023-08-29 22:03:00,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 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) [2023-08-29 22:03:00,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:00,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:00,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 22:03:00,336 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:03:00,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:00,337 INFO L85 PathProgramCache]: Analyzing trace with hash 160139597, now seen corresponding path program 1 times [2023-08-29 22:03:00,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:00,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213751666] [2023-08-29 22:03:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:00,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:00,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:00,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213751666] [2023-08-29 22:03:00,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213751666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:00,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067452613] [2023-08-29 22:03:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:00,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:00,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:00,393 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) [2023-08-29 22:03:00,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 22:03:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:00,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:03:00,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:00,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:00,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067452613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:00,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:00,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-29 22:03:00,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018891693] [2023-08-29 22:03:00,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:00,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:03:00,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:00,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:03:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:03:00,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 443 [2023-08-29 22:03:00,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 135 flow. Second operand has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 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) [2023-08-29 22:03:00,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:00,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 443 [2023-08-29 22:03:00,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:00,593 INFO L130 PetriNetUnfolder]: 33/109 cut-off events. [2023-08-29 22:03:00,593 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:00,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 109 events. 33/109 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 442 event pairs, 0 based on Foata normal form. 17/109 useless extension candidates. Maximal degree in co-relation 228. Up to 66 conditions per place. [2023-08-29 22:03:00,593 INFO L137 encePairwiseOnDemand]: 440/443 looper letters, 25 selfloop transitions, 2 changer transitions 11/45 dead transitions. [2023-08-29 22:03:00,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 173 flow [2023-08-29 22:03:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:00,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 822 transitions. [2023-08-29 22:03:00,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463882618510158 [2023-08-29 22:03:00,596 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 822 transitions. [2023-08-29 22:03:00,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 822 transitions. [2023-08-29 22:03:00,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:00,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 822 transitions. [2023-08-29 22:03:00,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 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) [2023-08-29 22:03:00,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 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) [2023-08-29 22:03:00,604 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 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) [2023-08-29 22:03:00,604 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 135 flow. Second operand 4 states and 822 transitions. [2023-08-29 22:03:00,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 173 flow [2023-08-29 22:03:00,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:00,605 INFO L231 Difference]: Finished difference. Result has 34 places, 22 transitions, 54 flow [2023-08-29 22:03:00,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2023-08-29 22:03:00,607 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -37 predicate places. [2023-08-29 22:03:00,607 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions, 54 flow [2023-08-29 22:03:00,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 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) [2023-08-29 22:03:00,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:00,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:00,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 22:03:00,813 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,SelfDestructingSolverStorable5 [2023-08-29 22:03:00,813 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:03:00,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:00,814 INFO L85 PathProgramCache]: Analyzing trace with hash 159380380, now seen corresponding path program 1 times [2023-08-29 22:03:00,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:00,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201971755] [2023-08-29 22:03:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:00,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:00,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201971755] [2023-08-29 22:03:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201971755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:00,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:00,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:00,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535339962] [2023-08-29 22:03:00,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:00,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:00,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:00,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:00,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:01,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 443 [2023-08-29 22:03:01,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 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) [2023-08-29 22:03:01,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:01,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 443 [2023-08-29 22:03:01,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:01,132 INFO L130 PetriNetUnfolder]: 20/75 cut-off events. [2023-08-29 22:03:01,133 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 22:03:01,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 75 events. 20/75 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 215 event pairs, 12 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 143. Up to 35 conditions per place. [2023-08-29 22:03:01,133 INFO L137 encePairwiseOnDemand]: 440/443 looper letters, 14 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-29 22:03:01,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 90 flow [2023-08-29 22:03:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2023-08-29 22:03:01,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439428141459744 [2023-08-29 22:03:01,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2023-08-29 22:03:01,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2023-08-29 22:03:01,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:01,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2023-08-29 22:03:01,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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) [2023-08-29 22:03:01,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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) [2023-08-29 22:03:01,140 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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) [2023-08-29 22:03:01,140 INFO L175 Difference]: Start difference. First operand has 34 places, 22 transitions, 54 flow. Second operand 3 states and 590 transitions. [2023-08-29 22:03:01,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 90 flow [2023-08-29 22:03:01,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 86 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:01,141 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 53 flow [2023-08-29 22:03:01,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-29 22:03:01,142 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -43 predicate places. [2023-08-29 22:03:01,142 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 53 flow [2023-08-29 22:03:01,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 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) [2023-08-29 22:03:01,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:01,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:01,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 22:03:01,143 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:03:01,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash 159380240, now seen corresponding path program 1 times [2023-08-29 22:03:01,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:01,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153128198] [2023-08-29 22:03:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:01,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:01,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:01,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153128198] [2023-08-29 22:03:01,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153128198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:01,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:01,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:01,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969134879] [2023-08-29 22:03:01,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:01,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:01,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:01,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:01,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:01,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 443 [2023-08-29 22:03:01,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 185.5) internal successors, (742), 4 states have internal predecessors, (742), 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) [2023-08-29 22:03:01,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:01,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 443 [2023-08-29 22:03:01,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:01,359 INFO L130 PetriNetUnfolder]: 18/58 cut-off events. [2023-08-29 22:03:01,359 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:01,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 58 events. 18/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 128 event pairs, 18 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 123. Up to 50 conditions per place. [2023-08-29 22:03:01,360 INFO L137 encePairwiseOnDemand]: 437/443 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2023-08-29 22:03:01,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 16 transitions, 69 flow [2023-08-29 22:03:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 570 transitions. [2023-08-29 22:03:01,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288939051918736 [2023-08-29 22:03:01,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 570 transitions. [2023-08-29 22:03:01,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 570 transitions. [2023-08-29 22:03:01,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:01,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 570 transitions. [2023-08-29 22:03:01,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 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) [2023-08-29 22:03:01,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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) [2023-08-29 22:03:01,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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) [2023-08-29 22:03:01,366 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 53 flow. Second operand 3 states and 570 transitions. [2023-08-29 22:03:01,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 16 transitions, 69 flow [2023-08-29 22:03:01,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 16 transitions, 65 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:01,367 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-29 22:03:01,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-29 22:03:01,368 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -48 predicate places. [2023-08-29 22:03:01,368 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-29 22:03:01,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.5) internal successors, (742), 4 states have internal predecessors, (742), 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) [2023-08-29 22:03:01,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 38 remaining) [2023-08-29 22:03:01,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 38 remaining) [2023-08-29 22:03:01,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 38 remaining) [2023-08-29 22:03:01,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 38 remaining) [2023-08-29 22:03:01,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 38 remaining) [2023-08-29 22:03:01,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 38 remaining) [2023-08-29 22:03:01,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 38 remaining) [2023-08-29 22:03:01,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (30 of 38 remaining) [2023-08-29 22:03:01,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (29 of 38 remaining) [2023-08-29 22:03:01,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 38 remaining) [2023-08-29 22:03:01,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 38 remaining) [2023-08-29 22:03:01,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 38 remaining) [2023-08-29 22:03:01,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 38 remaining) [2023-08-29 22:03:01,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 38 remaining) [2023-08-29 22:03:01,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 38 remaining) [2023-08-29 22:03:01,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 38 remaining) [2023-08-29 22:03:01,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 38 remaining) [2023-08-29 22:03:01,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 38 remaining) [2023-08-29 22:03:01,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 38 remaining) [2023-08-29 22:03:01,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 38 remaining) [2023-08-29 22:03:01,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 38 remaining) [2023-08-29 22:03:01,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 38 remaining) [2023-08-29 22:03:01,375 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 38 remaining) [2023-08-29 22:03:01,375 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 38 remaining) [2023-08-29 22:03:01,375 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 38 remaining) [2023-08-29 22:03:01,375 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 38 remaining) [2023-08-29 22:03:01,375 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 38 remaining) [2023-08-29 22:03:01,375 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 38 remaining) [2023-08-29 22:03:01,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 38 remaining) [2023-08-29 22:03:01,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 38 remaining) [2023-08-29 22:03:01,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (7 of 38 remaining) [2023-08-29 22:03:01,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 38 remaining) [2023-08-29 22:03:01,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 38 remaining) [2023-08-29 22:03:01,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 38 remaining) [2023-08-29 22:03:01,377 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (3 of 38 remaining) [2023-08-29 22:03:01,377 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 38 remaining) [2023-08-29 22:03:01,377 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 38 remaining) [2023-08-29 22:03:01,377 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 38 remaining) [2023-08-29 22:03:01,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 22:03:01,378 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:01,379 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 22:03:01,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 229 transitions, 466 flow [2023-08-29 22:03:01,408 INFO L130 PetriNetUnfolder]: 43/316 cut-off events. [2023-08-29 22:03:01,408 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 22:03:01,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 316 events. 43/316 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1168 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-08-29 22:03:01,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 229 transitions, 466 flow [2023-08-29 22:03:01,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 222 transitions, 449 flow [2023-08-29 22:03:01,412 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:03:01,412 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 222 transitions, 449 flow [2023-08-29 22:03:01,412 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 222 transitions, 449 flow [2023-08-29 22:03:01,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 222 transitions, 449 flow [2023-08-29 22:03:01,432 INFO L130 PetriNetUnfolder]: 41/309 cut-off events. [2023-08-29 22:03:01,433 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:01,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 309 events. 41/309 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1167 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-08-29 22:03:01,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 12462 [2023-08-29 22:03:09,227 INFO L134 LiptonReduction]: Checked pairs total: 32212 [2023-08-29 22:03:09,227 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-08-29 22:03:09,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 22:03:09,229 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;@57feee0f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:03:09,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 22:03:09,234 INFO L130 PetriNetUnfolder]: 9/49 cut-off events. [2023-08-29 22:03:09,234 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:09,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:09,235 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 22:03:09,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 22:03:09,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1900079077, now seen corresponding path program 1 times [2023-08-29 22:03:09,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:09,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172560806] [2023-08-29 22:03:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:09,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:03:09,250 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 22:03:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:03:09,291 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 22:03:09,291 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 22:03:09,292 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 22:03:09,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 22:03:09,292 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 22:03:09,293 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 22:03:09,293 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 22:03:09,293 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 22:03:09,328 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 22:03:09,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:09,380 INFO L130 PetriNetUnfolder]: 72/501 cut-off events. [2023-08-29 22:03:09,380 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:03:09,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 72/501 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2217 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 318. Up to 12 conditions per place. [2023-08-29 22:03:09,384 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:09,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:09,389 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:03:09,389 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:09,389 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:09,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:09,435 INFO L130 PetriNetUnfolder]: 72/501 cut-off events. [2023-08-29 22:03:09,436 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:03:09,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 72/501 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2217 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 318. Up to 12 conditions per place. [2023-08-29 22:03:09,457 INFO L119 LiptonReduction]: Number of co-enabled transitions 35376 [2023-08-29 22:03:16,321 INFO L134 LiptonReduction]: Checked pairs total: 89185 [2023-08-29 22:03:16,322 INFO L136 LiptonReduction]: Total number of compositions: 269 [2023-08-29 22:03:16,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:03:16,324 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;@57feee0f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:03:16,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-08-29 22:03:16,325 INFO L130 PetriNetUnfolder]: 0/4 cut-off events. [2023-08-29 22:03:16,326 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:16,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:16,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:03:16,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:16,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:16,326 INFO L85 PathProgramCache]: Analyzing trace with hash 55496, now seen corresponding path program 1 times [2023-08-29 22:03:16,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:16,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029249368] [2023-08-29 22:03:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:16,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:16,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:16,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029249368] [2023-08-29 22:03:16,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029249368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:16,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:16,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:03:16,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167015587] [2023-08-29 22:03:16,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:16,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:16,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:16,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:16,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:16,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 567 [2023-08-29 22:03:16,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 136 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 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) [2023-08-29 22:03:16,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:16,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 567 [2023-08-29 22:03:16,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:19,356 INFO L130 PetriNetUnfolder]: 24517/40654 cut-off events. [2023-08-29 22:03:19,357 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2023-08-29 22:03:19,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77276 conditions, 40654 events. 24517/40654 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 1955. Compared 359331 event pairs, 11305 based on Foata normal form. 3334/31531 useless extension candidates. Maximal degree in co-relation 7066. Up to 36445 conditions per place. [2023-08-29 22:03:19,671 INFO L137 encePairwiseOnDemand]: 523/567 looper letters, 95 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2023-08-29 22:03:19,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 119 transitions, 450 flow [2023-08-29 22:03:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-08-29 22:03:19,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314520870076426 [2023-08-29 22:03:19,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-08-29 22:03:19,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-08-29 22:03:19,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:19,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-08-29 22:03:19,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 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) [2023-08-29 22:03:19,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 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) [2023-08-29 22:03:19,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 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) [2023-08-29 22:03:19,680 INFO L175 Difference]: Start difference. First operand has 103 places, 136 transitions, 290 flow. Second operand 3 states and 904 transitions. [2023-08-29 22:03:19,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 119 transitions, 450 flow [2023-08-29 22:03:19,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 119 transitions, 450 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:03:19,686 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 224 flow [2023-08-29 22:03:19,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2023-08-29 22:03:19,687 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-29 22:03:19,687 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 224 flow [2023-08-29 22:03:19,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 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) [2023-08-29 22:03:19,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:19,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:03:19,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 22:03:19,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:19,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash 55494, now seen corresponding path program 1 times [2023-08-29 22:03:19,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:19,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950763523] [2023-08-29 22:03:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:19,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:19,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:19,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950763523] [2023-08-29 22:03:19,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950763523] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:19,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:19,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:03:19,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511081246] [2023-08-29 22:03:19,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:19,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:19,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:19,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:19,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:19,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 567 [2023-08-29 22:03:19,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 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) [2023-08-29 22:03:19,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:19,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 567 [2023-08-29 22:03:19,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:22,055 INFO L130 PetriNetUnfolder]: 23189/38059 cut-off events. [2023-08-29 22:03:22,055 INFO L131 PetriNetUnfolder]: For 1003/1003 co-relation queries the response was YES. [2023-08-29 22:03:22,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73447 conditions, 38059 events. 23189/38059 cut-off events. For 1003/1003 co-relation queries the response was YES. Maximal size of possible extension queue 1865. Compared 331063 event pairs, 20152 based on Foata normal form. 0/27122 useless extension candidates. Maximal degree in co-relation 73296. Up to 31306 conditions per place. [2023-08-29 22:03:22,246 INFO L137 encePairwiseOnDemand]: 563/567 looper letters, 110 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2023-08-29 22:03:22,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 134 transitions, 522 flow [2023-08-29 22:03:22,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 857 transitions. [2023-08-29 22:03:22,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038212815990594 [2023-08-29 22:03:22,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 857 transitions. [2023-08-29 22:03:22,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 857 transitions. [2023-08-29 22:03:22,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:22,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 857 transitions. [2023-08-29 22:03:22,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 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) [2023-08-29 22:03:22,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 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) [2023-08-29 22:03:22,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 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) [2023-08-29 22:03:22,255 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 224 flow. Second operand 3 states and 857 transitions. [2023-08-29 22:03:22,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 134 transitions, 522 flow [2023-08-29 22:03:22,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 520 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:03:22,258 INFO L231 Difference]: Finished difference. Result has 97 places, 95 transitions, 222 flow [2023-08-29 22:03:22,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=97, PETRI_TRANSITIONS=95} [2023-08-29 22:03:22,260 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -6 predicate places. [2023-08-29 22:03:22,260 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 95 transitions, 222 flow [2023-08-29 22:03:22,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 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) [2023-08-29 22:03:22,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:22,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:03:22,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 22:03:22,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:22,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:22,261 INFO L85 PathProgramCache]: Analyzing trace with hash 55034, now seen corresponding path program 1 times [2023-08-29 22:03:22,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:22,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858674465] [2023-08-29 22:03:22,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:22,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:22,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:22,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858674465] [2023-08-29 22:03:22,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858674465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:22,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:22,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:03:22,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403417937] [2023-08-29 22:03:22,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:22,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:22,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:22,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:22,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:22,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-08-29 22:03:22,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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) [2023-08-29 22:03:22,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:22,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-08-29 22:03:22,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:24,457 INFO L130 PetriNetUnfolder]: 24105/39056 cut-off events. [2023-08-29 22:03:24,457 INFO L131 PetriNetUnfolder]: For 1204/1204 co-relation queries the response was YES. [2023-08-29 22:03:24,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76187 conditions, 39056 events. 24105/39056 cut-off events. For 1204/1204 co-relation queries the response was YES. Maximal size of possible extension queue 1907. Compared 333512 event pairs, 21828 based on Foata normal form. 0/27860 useless extension candidates. Maximal degree in co-relation 67753. Up to 33907 conditions per place. [2023-08-29 22:03:24,705 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 111 selfloop transitions, 1 changer transitions 2/135 dead transitions. [2023-08-29 22:03:24,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 135 transitions, 530 flow [2023-08-29 22:03:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2023-08-29 22:03:24,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-08-29 22:03:24,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2023-08-29 22:03:24,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2023-08-29 22:03:24,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:24,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2023-08-29 22:03:24,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 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) [2023-08-29 22:03:24,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 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) [2023-08-29 22:03:24,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 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) [2023-08-29 22:03:24,716 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 222 flow. Second operand 3 states and 864 transitions. [2023-08-29 22:03:24,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 135 transitions, 530 flow [2023-08-29 22:03:24,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 135 transitions, 526 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:24,746 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 221 flow [2023-08-29 22:03:24,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2023-08-29 22:03:24,747 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-29 22:03:24,747 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 221 flow [2023-08-29 22:03:24,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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) [2023-08-29 22:03:24,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:24,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:03:24,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 22:03:24,748 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:24,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash -244463375, now seen corresponding path program 1 times [2023-08-29 22:03:24,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:24,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430028478] [2023-08-29 22:03:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:24,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:24,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:24,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430028478] [2023-08-29 22:03:24,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430028478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:24,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:24,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:24,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034166902] [2023-08-29 22:03:24,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:24,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:24,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:24,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:24,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:25,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 567 [2023-08-29 22:03:25,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 231.5) internal successors, (926), 4 states have internal predecessors, (926), 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) [2023-08-29 22:03:25,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:25,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 567 [2023-08-29 22:03:25,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:26,708 INFO L130 PetriNetUnfolder]: 17915/29471 cut-off events. [2023-08-29 22:03:26,709 INFO L131 PetriNetUnfolder]: For 1156/1156 co-relation queries the response was YES. [2023-08-29 22:03:26,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57471 conditions, 29471 events. 17915/29471 cut-off events. For 1156/1156 co-relation queries the response was YES. Maximal size of possible extension queue 1406. Compared 244965 event pairs, 15460 based on Foata normal form. 2489/23406 useless extension candidates. Maximal degree in co-relation 55096. Up to 24123 conditions per place. [2023-08-29 22:03:26,834 INFO L137 encePairwiseOnDemand]: 559/567 looper letters, 99 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2023-08-29 22:03:26,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 122 transitions, 479 flow [2023-08-29 22:03:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1032 transitions. [2023-08-29 22:03:26,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2023-08-29 22:03:26,839 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1032 transitions. [2023-08-29 22:03:26,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1032 transitions. [2023-08-29 22:03:26,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:26,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1032 transitions. [2023-08-29 22:03:26,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-08-29 22:03:26,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 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) [2023-08-29 22:03:26,846 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 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) [2023-08-29 22:03:26,846 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 221 flow. Second operand 4 states and 1032 transitions. [2023-08-29 22:03:26,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 122 transitions, 479 flow [2023-08-29 22:03:26,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 122 transitions, 475 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:26,917 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 209 flow [2023-08-29 22:03:26,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-08-29 22:03:26,918 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -10 predicate places. [2023-08-29 22:03:26,918 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 209 flow [2023-08-29 22:03:26,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 231.5) internal successors, (926), 4 states have internal predecessors, (926), 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) [2023-08-29 22:03:26,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:26,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:03:26,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 22:03:26,918 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:26,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:26,919 INFO L85 PathProgramCache]: Analyzing trace with hash -244830664, now seen corresponding path program 1 times [2023-08-29 22:03:26,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:26,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721430212] [2023-08-29 22:03:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:26,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:26,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:26,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721430212] [2023-08-29 22:03:26,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721430212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:26,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33503533] [2023-08-29 22:03:26,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:26,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:26,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:26,996 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) [2023-08-29 22:03:26,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 22:03:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:27,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:03:27,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:27,289 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:03:27,290 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 298 treesize of output 301 [2023-08-29 22:03:27,317 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:03:27,317 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 1 case distinctions, treesize of input 286 treesize of output 287 [2023-08-29 22:03:27,347 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:27,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 188 [2023-08-29 22:03:27,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:03:27,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 22:03:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:27,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:27,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33503533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:27,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:27,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 7 [2023-08-29 22:03:27,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739517958] [2023-08-29 22:03:27,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:27,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 22:03:27,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:27,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 22:03:27,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-08-29 22:03:27,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 567 [2023-08-29 22:03:27,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 209 flow. Second operand has 9 states, 9 states have (on average 248.66666666666666) internal successors, (2238), 9 states have internal predecessors, (2238), 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) [2023-08-29 22:03:27,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:27,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 567 [2023-08-29 22:03:27,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:29,456 INFO L130 PetriNetUnfolder]: 15272/25540 cut-off events. [2023-08-29 22:03:29,456 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2023-08-29 22:03:29,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50742 conditions, 25540 events. 15272/25540 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 1316. Compared 220294 event pairs, 1 based on Foata normal form. 18/18608 useless extension candidates. Maximal degree in co-relation 45898. Up to 20586 conditions per place. [2023-08-29 22:03:29,585 INFO L137 encePairwiseOnDemand]: 562/567 looper letters, 146 selfloop transitions, 4 changer transitions 0/172 dead transitions. [2023-08-29 22:03:29,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 172 transitions, 675 flow [2023-08-29 22:03:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:03:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:03:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1388 transitions. [2023-08-29 22:03:29,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48959435626102293 [2023-08-29 22:03:29,589 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1388 transitions. [2023-08-29 22:03:29,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1388 transitions. [2023-08-29 22:03:29,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:29,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1388 transitions. [2023-08-29 22:03:29,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 277.6) internal successors, (1388), 5 states have internal predecessors, (1388), 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) [2023-08-29 22:03:29,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 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) [2023-08-29 22:03:29,610 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 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) [2023-08-29 22:03:29,610 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 209 flow. Second operand 5 states and 1388 transitions. [2023-08-29 22:03:29,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 172 transitions, 675 flow [2023-08-29 22:03:29,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 172 transitions, 672 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:29,633 INFO L231 Difference]: Finished difference. Result has 95 places, 87 transitions, 214 flow [2023-08-29 22:03:29,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=95, PETRI_TRANSITIONS=87} [2023-08-29 22:03:29,634 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -8 predicate places. [2023-08-29 22:03:29,634 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 87 transitions, 214 flow [2023-08-29 22:03:29,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 248.66666666666666) internal successors, (2238), 9 states have internal predecessors, (2238), 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) [2023-08-29 22:03:29,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:29,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:29,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-29 22:03:29,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:29,840 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:29,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1011563040, now seen corresponding path program 1 times [2023-08-29 22:03:29,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:29,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567930771] [2023-08-29 22:03:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:29,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:29,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:29,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567930771] [2023-08-29 22:03:29,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567930771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:29,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:29,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:29,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800461931] [2023-08-29 22:03:29,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:29,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:29,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:29,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:29,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:30,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 567 [2023-08-29 22:03:30,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 87 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 229.5) internal successors, (918), 4 states have internal predecessors, (918), 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) [2023-08-29 22:03:30,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:30,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 567 [2023-08-29 22:03:30,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:31,369 INFO L130 PetriNetUnfolder]: 11995/19693 cut-off events. [2023-08-29 22:03:31,370 INFO L131 PetriNetUnfolder]: For 1444/1444 co-relation queries the response was YES. [2023-08-29 22:03:31,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39989 conditions, 19693 events. 11995/19693 cut-off events. For 1444/1444 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 149810 event pairs, 9556 based on Foata normal form. 0/16186 useless extension candidates. Maximal degree in co-relation 18156. Up to 14533 conditions per place. [2023-08-29 22:03:31,428 INFO L137 encePairwiseOnDemand]: 543/567 looper letters, 110 selfloop transitions, 14 changer transitions 0/142 dead transitions. [2023-08-29 22:03:31,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 142 transitions, 573 flow [2023-08-29 22:03:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1055 transitions. [2023-08-29 22:03:31,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4651675485008818 [2023-08-29 22:03:31,432 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1055 transitions. [2023-08-29 22:03:31,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1055 transitions. [2023-08-29 22:03:31,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:31,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1055 transitions. [2023-08-29 22:03:31,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.75) internal successors, (1055), 4 states have internal predecessors, (1055), 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) [2023-08-29 22:03:31,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 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) [2023-08-29 22:03:31,438 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 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) [2023-08-29 22:03:31,438 INFO L175 Difference]: Start difference. First operand has 95 places, 87 transitions, 214 flow. Second operand 4 states and 1055 transitions. [2023-08-29 22:03:31,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 142 transitions, 573 flow [2023-08-29 22:03:31,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 142 transitions, 565 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 22:03:31,444 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 350 flow [2023-08-29 22:03:31,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2023-08-29 22:03:31,445 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-29 22:03:31,445 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 350 flow [2023-08-29 22:03:31,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.5) internal successors, (918), 4 states have internal predecessors, (918), 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) [2023-08-29 22:03:31,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:31,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:31,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 22:03:31,446 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:31,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:31,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1011563194, now seen corresponding path program 1 times [2023-08-29 22:03:31,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:31,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778769740] [2023-08-29 22:03:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:31,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:31,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:31,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778769740] [2023-08-29 22:03:31,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778769740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:31,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:31,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:31,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604589684] [2023-08-29 22:03:31,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:31,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:31,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:31,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:31,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:31,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 567 [2023-08-29 22:03:31,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 245.5) internal successors, (982), 4 states have internal predecessors, (982), 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) [2023-08-29 22:03:31,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:31,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 567 [2023-08-29 22:03:31,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:33,108 INFO L130 PetriNetUnfolder]: 14592/24885 cut-off events. [2023-08-29 22:03:33,108 INFO L131 PetriNetUnfolder]: For 6661/6782 co-relation queries the response was YES. [2023-08-29 22:03:33,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57950 conditions, 24885 events. 14592/24885 cut-off events. For 6661/6782 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 206901 event pairs, 4603 based on Foata normal form. 0/21558 useless extension candidates. Maximal degree in co-relation 48547. Up to 14525 conditions per place. [2023-08-29 22:03:33,217 INFO L137 encePairwiseOnDemand]: 554/567 looper letters, 163 selfloop transitions, 20 changer transitions 0/206 dead transitions. [2023-08-29 22:03:33,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 206 transitions, 1068 flow [2023-08-29 22:03:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:33,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1141 transitions. [2023-08-29 22:03:33,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2023-08-29 22:03:33,220 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1141 transitions. [2023-08-29 22:03:33,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1141 transitions. [2023-08-29 22:03:33,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:33,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1141 transitions. [2023-08-29 22:03:33,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 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) [2023-08-29 22:03:33,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 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) [2023-08-29 22:03:33,227 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 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) [2023-08-29 22:03:33,227 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 350 flow. Second operand 4 states and 1141 transitions. [2023-08-29 22:03:33,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 206 transitions, 1068 flow [2023-08-29 22:03:33,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 206 transitions, 1064 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:03:33,252 INFO L231 Difference]: Finished difference. Result has 103 places, 118 transitions, 554 flow [2023-08-29 22:03:33,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=554, PETRI_PLACES=103, PETRI_TRANSITIONS=118} [2023-08-29 22:03:33,253 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 0 predicate places. [2023-08-29 22:03:33,253 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 118 transitions, 554 flow [2023-08-29 22:03:33,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 245.5) internal successors, (982), 4 states have internal predecessors, (982), 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) [2023-08-29 22:03:33,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:33,253 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:33,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 22:03:33,254 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:33,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:33,254 INFO L85 PathProgramCache]: Analyzing trace with hash -665276673, now seen corresponding path program 1 times [2023-08-29 22:03:33,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:33,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617398687] [2023-08-29 22:03:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:33,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:33,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:33,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617398687] [2023-08-29 22:03:33,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617398687] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:33,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217846441] [2023-08-29 22:03:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:33,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:33,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:33,305 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) [2023-08-29 22:03:33,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 22:03:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:33,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 22:03:33,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:33,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:33,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217846441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:33,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:33,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 22:03:33,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713991839] [2023-08-29 22:03:33,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:33,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:03:33,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:33,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:03:33,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:03:33,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 567 [2023-08-29 22:03:33,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 118 transitions, 554 flow. Second operand has 8 states, 8 states have (on average 253.25) internal successors, (2026), 8 states have internal predecessors, (2026), 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) [2023-08-29 22:03:33,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:33,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 567 [2023-08-29 22:03:33,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:33,793 INFO L130 PetriNetUnfolder]: 1117/2176 cut-off events. [2023-08-29 22:03:33,794 INFO L131 PetriNetUnfolder]: For 1826/1858 co-relation queries the response was YES. [2023-08-29 22:03:33,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6049 conditions, 2176 events. 1117/2176 cut-off events. For 1826/1858 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14031 event pairs, 40 based on Foata normal form. 241/2318 useless extension candidates. Maximal degree in co-relation 6037. Up to 1353 conditions per place. [2023-08-29 22:03:33,801 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 59 selfloop transitions, 3 changer transitions 23/97 dead transitions. [2023-08-29 22:03:33,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 575 flow [2023-08-29 22:03:33,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:03:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:03:33,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1328 transitions. [2023-08-29 22:03:33,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46843033509700177 [2023-08-29 22:03:33,805 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1328 transitions. [2023-08-29 22:03:33,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1328 transitions. [2023-08-29 22:03:33,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:33,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1328 transitions. [2023-08-29 22:03:33,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 265.6) internal successors, (1328), 5 states have internal predecessors, (1328), 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) [2023-08-29 22:03:33,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 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) [2023-08-29 22:03:33,812 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 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) [2023-08-29 22:03:33,812 INFO L175 Difference]: Start difference. First operand has 103 places, 118 transitions, 554 flow. Second operand 5 states and 1328 transitions. [2023-08-29 22:03:33,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 575 flow [2023-08-29 22:03:33,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 97 transitions, 567 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-29 22:03:33,816 INFO L231 Difference]: Finished difference. Result has 60 places, 40 transitions, 147 flow [2023-08-29 22:03:33,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=60, PETRI_TRANSITIONS=40} [2023-08-29 22:03:33,816 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -43 predicate places. [2023-08-29 22:03:33,817 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 40 transitions, 147 flow [2023-08-29 22:03:33,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 253.25) internal successors, (2026), 8 states have internal predecessors, (2026), 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) [2023-08-29 22:03:33,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:33,817 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:33,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 22:03:34,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-29 22:03:34,028 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:34,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:34,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1177949868, now seen corresponding path program 1 times [2023-08-29 22:03:34,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:34,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545087866] [2023-08-29 22:03:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:34,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:34,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:34,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545087866] [2023-08-29 22:03:34,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545087866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:34,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:34,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:03:34,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955720627] [2023-08-29 22:03:34,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:34,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:34,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:34,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:34,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 567 [2023-08-29 22:03:34,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 40 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 250.25) internal successors, (1001), 4 states have internal predecessors, (1001), 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) [2023-08-29 22:03:34,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:34,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 567 [2023-08-29 22:03:34,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:34,281 INFO L130 PetriNetUnfolder]: 90/286 cut-off events. [2023-08-29 22:03:34,281 INFO L131 PetriNetUnfolder]: For 260/260 co-relation queries the response was YES. [2023-08-29 22:03:34,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 286 events. 90/286 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1294 event pairs, 7 based on Foata normal form. 54/325 useless extension candidates. Maximal degree in co-relation 729. Up to 194 conditions per place. [2023-08-29 22:03:34,282 INFO L137 encePairwiseOnDemand]: 562/567 looper letters, 27 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-08-29 22:03:34,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 44 transitions, 233 flow [2023-08-29 22:03:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1020 transitions. [2023-08-29 22:03:34,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2023-08-29 22:03:34,285 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1020 transitions. [2023-08-29 22:03:34,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1020 transitions. [2023-08-29 22:03:34,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:34,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1020 transitions. [2023-08-29 22:03:34,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 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) [2023-08-29 22:03:34,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 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) [2023-08-29 22:03:34,291 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 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) [2023-08-29 22:03:34,291 INFO L175 Difference]: Start difference. First operand has 60 places, 40 transitions, 147 flow. Second operand 4 states and 1020 transitions. [2023-08-29 22:03:34,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 44 transitions, 233 flow [2023-08-29 22:03:34,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 198 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-29 22:03:34,293 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 125 flow [2023-08-29 22:03:34,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2023-08-29 22:03:34,293 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -49 predicate places. [2023-08-29 22:03:34,293 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 125 flow [2023-08-29 22:03:34,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 250.25) internal successors, (1001), 4 states have internal predecessors, (1001), 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) [2023-08-29 22:03:34,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:34,294 INFO L208 CegarLoopForPetriNet]: 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] [2023-08-29 22:03:34,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 22:03:34,294 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:34,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1447473421, now seen corresponding path program 1 times [2023-08-29 22:03:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:34,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163209634] [2023-08-29 22:03:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:34,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:03:34,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:34,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163209634] [2023-08-29 22:03:34,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163209634] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:34,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036670941] [2023-08-29 22:03:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:34,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:34,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:34,617 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) [2023-08-29 22:03:34,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 22:03:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:34,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-29 22:03:34,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:34,917 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:03:34,918 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 [2023-08-29 22:03:34,937 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:03:34,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 22:03:34,984 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 77 treesize of output 65 [2023-08-29 22:03:35,096 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 77 treesize of output 65 [2023-08-29 22:03:35,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:35,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 95 [2023-08-29 22:03:35,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:35,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 95 [2023-08-29 22:03:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:03:35,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:35,624 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_344 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_344) |c_~#B~0.base|) |c_~#B~0.offset|) 0)) is different from false [2023-08-29 22:03:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-29 22:03:35,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036670941] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:35,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:35,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-29 22:03:35,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832132342] [2023-08-29 22:03:35,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:35,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:03:35,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:35,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:03:35,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=100, Unknown=1, NotChecked=20, Total=156 [2023-08-29 22:03:35,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 567 [2023-08-29 22:03:35,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 125 flow. Second operand has 13 states, 13 states have (on average 184.30769230769232) internal successors, (2396), 13 states have internal predecessors, (2396), 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) [2023-08-29 22:03:35,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:35,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 567 [2023-08-29 22:03:35,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:36,183 INFO L130 PetriNetUnfolder]: 136/429 cut-off events. [2023-08-29 22:03:36,184 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-08-29 22:03:36,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 429 events. 136/429 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2260 event pairs, 36 based on Foata normal form. 6/413 useless extension candidates. Maximal degree in co-relation 1052. Up to 149 conditions per place. [2023-08-29 22:03:36,185 INFO L137 encePairwiseOnDemand]: 559/567 looper letters, 57 selfloop transitions, 11 changer transitions 11/90 dead transitions. [2023-08-29 22:03:36,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 470 flow [2023-08-29 22:03:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:03:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:03:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1705 transitions. [2023-08-29 22:03:36,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33411718596903783 [2023-08-29 22:03:36,192 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1705 transitions. [2023-08-29 22:03:36,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1705 transitions. [2023-08-29 22:03:36,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:36,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1705 transitions. [2023-08-29 22:03:36,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 189.44444444444446) internal successors, (1705), 9 states have internal predecessors, (1705), 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) [2023-08-29 22:03:36,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 567.0) internal successors, (5670), 10 states have internal predecessors, (5670), 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) [2023-08-29 22:03:36,202 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 567.0) internal successors, (5670), 10 states have internal predecessors, (5670), 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) [2023-08-29 22:03:36,202 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 125 flow. Second operand 9 states and 1705 transitions. [2023-08-29 22:03:36,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 470 flow [2023-08-29 22:03:36,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 459 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:36,204 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 197 flow [2023-08-29 22:03:36,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=197, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2023-08-29 22:03:36,205 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -40 predicate places. [2023-08-29 22:03:36,205 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 197 flow [2023-08-29 22:03:36,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 184.30769230769232) internal successors, (2396), 13 states have internal predecessors, (2396), 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) [2023-08-29 22:03:36,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:36,206 INFO L208 CegarLoopForPetriNet]: 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] [2023-08-29 22:03:36,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:03:36,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:36,415 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:36,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:36,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1323633613, now seen corresponding path program 1 times [2023-08-29 22:03:36,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:36,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848003878] [2023-08-29 22:03:36,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:36,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:03:36,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:36,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848003878] [2023-08-29 22:03:36,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848003878] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:36,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435669848] [2023-08-29 22:03:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:36,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:36,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:36,753 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) [2023-08-29 22:03:36,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 22:03:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:36,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-29 22:03:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:37,050 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:03:37,050 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 [2023-08-29 22:03:37,079 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:03:37,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 22:03:37,127 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 77 treesize of output 65 [2023-08-29 22:03:37,254 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 77 treesize of output 65 [2023-08-29 22:03:37,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:37,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 95 [2023-08-29 22:03:37,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:37,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 95 [2023-08-29 22:03:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:03:37,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:03:37,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435669848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:37,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:37,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-29 22:03:37,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462788464] [2023-08-29 22:03:37,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:37,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:03:37,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:37,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:03:37,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=116, Unknown=3, NotChecked=0, Total=156 [2023-08-29 22:03:39,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 567 [2023-08-29 22:03:39,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 197 flow. Second operand has 13 states, 13 states have (on average 184.15384615384616) internal successors, (2394), 13 states have internal predecessors, (2394), 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) [2023-08-29 22:03:39,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:39,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 567 [2023-08-29 22:03:39,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:39,398 INFO L130 PetriNetUnfolder]: 129/447 cut-off events. [2023-08-29 22:03:39,398 INFO L131 PetriNetUnfolder]: For 355/355 co-relation queries the response was YES. [2023-08-29 22:03:39,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 447 events. 129/447 cut-off events. For 355/355 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2513 event pairs, 55 based on Foata normal form. 4/427 useless extension candidates. Maximal degree in co-relation 1193. Up to 227 conditions per place. [2023-08-29 22:03:39,400 INFO L137 encePairwiseOnDemand]: 558/567 looper letters, 47 selfloop transitions, 11 changer transitions 14/83 dead transitions. [2023-08-29 22:03:39,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 458 flow [2023-08-29 22:03:39,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 22:03:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 22:03:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2055 transitions. [2023-08-29 22:03:39,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3294853294853295 [2023-08-29 22:03:39,406 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2055 transitions. [2023-08-29 22:03:39,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2055 transitions. [2023-08-29 22:03:39,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:39,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2055 transitions. [2023-08-29 22:03:39,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 186.8181818181818) internal successors, (2055), 11 states have internal predecessors, (2055), 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) [2023-08-29 22:03:39,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 567.0) internal successors, (6804), 12 states have internal predecessors, (6804), 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) [2023-08-29 22:03:39,418 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 567.0) internal successors, (6804), 12 states have internal predecessors, (6804), 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) [2023-08-29 22:03:39,418 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 197 flow. Second operand 11 states and 2055 transitions. [2023-08-29 22:03:39,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 458 flow [2023-08-29 22:03:39,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 435 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:39,421 INFO L231 Difference]: Finished difference. Result has 76 places, 55 transitions, 243 flow [2023-08-29 22:03:39,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=243, PETRI_PLACES=76, PETRI_TRANSITIONS=55} [2023-08-29 22:03:39,422 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -27 predicate places. [2023-08-29 22:03:39,422 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 55 transitions, 243 flow [2023-08-29 22:03:39,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 184.15384615384616) internal successors, (2394), 13 states have internal predecessors, (2394), 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) [2023-08-29 22:03:39,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:39,423 INFO L208 CegarLoopForPetriNet]: 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] [2023-08-29 22:03:39,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 22:03:39,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:39,628 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:39,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:39,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1937546215, now seen corresponding path program 2 times [2023-08-29 22:03:39,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:39,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218862585] [2023-08-29 22:03:39,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:39,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:39,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:39,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218862585] [2023-08-29 22:03:39,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218862585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:39,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435818518] [2023-08-29 22:03:39,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:03:39,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:39,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:39,957 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) [2023-08-29 22:03:39,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 22:03:40,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:03:40,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:03:40,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-29 22:03:40,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:40,417 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:03:40,418 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 298 treesize of output 301 [2023-08-29 22:03:40,450 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:03:40,451 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 1 case distinctions, treesize of input 286 treesize of output 287 [2023-08-29 22:03:40,555 INFO L321 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-08-29 22:03:40,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2023-08-29 22:03:40,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:03:40,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 65 [2023-08-29 22:03:40,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:40,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 95 [2023-08-29 22:03:41,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:03:41,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 65 [2023-08-29 22:03:41,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:41,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 95 [2023-08-29 22:03:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:41,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:41,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435818518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:41,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:41,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-29 22:03:41,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510665744] [2023-08-29 22:03:41,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:41,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:03:41,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:41,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:03:41,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:03:42,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 567 [2023-08-29 22:03:42,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 55 transitions, 243 flow. Second operand has 14 states, 14 states have (on average 242.71428571428572) internal successors, (3398), 14 states have internal predecessors, (3398), 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) [2023-08-29 22:03:42,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:42,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 567 [2023-08-29 22:03:42,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:42,940 INFO L130 PetriNetUnfolder]: 121/417 cut-off events. [2023-08-29 22:03:42,940 INFO L131 PetriNetUnfolder]: For 313/313 co-relation queries the response was YES. [2023-08-29 22:03:42,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1123 conditions, 417 events. 121/417 cut-off events. For 313/313 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2289 event pairs, 62 based on Foata normal form. 3/397 useless extension candidates. Maximal degree in co-relation 1106. Up to 181 conditions per place. [2023-08-29 22:03:42,942 INFO L137 encePairwiseOnDemand]: 560/567 looper letters, 23 selfloop transitions, 2 changer transitions 37/69 dead transitions. [2023-08-29 22:03:42,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 69 transitions, 421 flow [2023-08-29 22:03:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:03:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:03:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1482 transitions. [2023-08-29 22:03:42,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43562610229276894 [2023-08-29 22:03:42,945 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1482 transitions. [2023-08-29 22:03:42,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1482 transitions. [2023-08-29 22:03:42,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:42,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1482 transitions. [2023-08-29 22:03:42,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 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) [2023-08-29 22:03:42,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 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) [2023-08-29 22:03:42,952 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 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) [2023-08-29 22:03:42,952 INFO L175 Difference]: Start difference. First operand has 76 places, 55 transitions, 243 flow. Second operand 6 states and 1482 transitions. [2023-08-29 22:03:42,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 69 transitions, 421 flow [2023-08-29 22:03:42,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 392 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-29 22:03:42,955 INFO L231 Difference]: Finished difference. Result has 72 places, 31 transitions, 125 flow [2023-08-29 22:03:42,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=125, PETRI_PLACES=72, PETRI_TRANSITIONS=31} [2023-08-29 22:03:42,955 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -31 predicate places. [2023-08-29 22:03:42,956 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 31 transitions, 125 flow [2023-08-29 22:03:42,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 242.71428571428572) internal successors, (3398), 14 states have internal predecessors, (3398), 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) [2023-08-29 22:03:42,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:42,956 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:42,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 22:03:43,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:43,162 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:43,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:43,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1617161393, now seen corresponding path program 2 times [2023-08-29 22:03:43,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:43,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175720577] [2023-08-29 22:03:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:43,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:03:43,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:43,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175720577] [2023-08-29 22:03:43,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175720577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:43,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:43,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:03:43,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521151050] [2023-08-29 22:03:43,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:43,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:03:43,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:43,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:03:43,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:03:44,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 567 [2023-08-29 22:03:44,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 31 transitions, 125 flow. Second operand has 7 states, 7 states have (on average 242.57142857142858) internal successors, (1698), 7 states have internal predecessors, (1698), 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) [2023-08-29 22:03:44,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:44,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 567 [2023-08-29 22:03:44,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:44,113 INFO L130 PetriNetUnfolder]: 30/123 cut-off events. [2023-08-29 22:03:44,114 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-29 22:03:44,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 123 events. 30/123 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 372 event pairs, 23 based on Foata normal form. 1/124 useless extension candidates. Maximal degree in co-relation 311. Up to 70 conditions per place. [2023-08-29 22:03:44,114 INFO L137 encePairwiseOnDemand]: 560/567 looper letters, 0 selfloop transitions, 0 changer transitions 35/35 dead transitions. [2023-08-29 22:03:44,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 35 transitions, 193 flow [2023-08-29 22:03:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:03:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:03:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1704 transitions. [2023-08-29 22:03:44,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4293272864701436 [2023-08-29 22:03:44,118 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1704 transitions. [2023-08-29 22:03:44,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1704 transitions. [2023-08-29 22:03:44,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:44,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1704 transitions. [2023-08-29 22:03:44,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 243.42857142857142) internal successors, (1704), 7 states have internal predecessors, (1704), 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) [2023-08-29 22:03:44,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 567.0) internal successors, (4536), 8 states have internal predecessors, (4536), 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) [2023-08-29 22:03:44,125 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 567.0) internal successors, (4536), 8 states have internal predecessors, (4536), 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) [2023-08-29 22:03:44,126 INFO L175 Difference]: Start difference. First operand has 72 places, 31 transitions, 125 flow. Second operand 7 states and 1704 transitions. [2023-08-29 22:03:44,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 35 transitions, 193 flow [2023-08-29 22:03:44,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 35 transitions, 177 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 22:03:44,127 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2023-08-29 22:03:44,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2023-08-29 22:03:44,127 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -55 predicate places. [2023-08-29 22:03:44,127 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2023-08-29 22:03:44,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 242.57142857142858) internal successors, (1698), 7 states have internal predecessors, (1698), 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) [2023-08-29 22:03:44,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 49 remaining) [2023-08-29 22:03:44,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2023-08-29 22:03:44,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2023-08-29 22:03:44,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2023-08-29 22:03:44,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (44 of 49 remaining) [2023-08-29 22:03:44,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (43 of 49 remaining) [2023-08-29 22:03:44,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2023-08-29 22:03:44,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2023-08-29 22:03:44,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2023-08-29 22:03:44,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 49 remaining) [2023-08-29 22:03:44,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2023-08-29 22:03:44,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2023-08-29 22:03:44,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 49 remaining) [2023-08-29 22:03:44,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 49 remaining) [2023-08-29 22:03:44,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2023-08-29 22:03:44,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 49 remaining) [2023-08-29 22:03:44,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2023-08-29 22:03:44,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2023-08-29 22:03:44,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 49 remaining) [2023-08-29 22:03:44,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2023-08-29 22:03:44,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2023-08-29 22:03:44,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 49 remaining) [2023-08-29 22:03:44,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2023-08-29 22:03:44,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 49 remaining) [2023-08-29 22:03:44,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2023-08-29 22:03:44,132 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2023-08-29 22:03:44,132 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 49 remaining) [2023-08-29 22:03:44,132 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (21 of 49 remaining) [2023-08-29 22:03:44,132 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2023-08-29 22:03:44,132 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2023-08-29 22:03:44,132 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 49 remaining) [2023-08-29 22:03:44,132 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 49 remaining) [2023-08-29 22:03:44,133 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2023-08-29 22:03:44,133 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 49 remaining) [2023-08-29 22:03:44,133 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (14 of 49 remaining) [2023-08-29 22:03:44,133 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2023-08-29 22:03:44,133 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2023-08-29 22:03:44,133 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 49 remaining) [2023-08-29 22:03:44,133 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 49 remaining) [2023-08-29 22:03:44,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2023-08-29 22:03:44,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2023-08-29 22:03:44,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2023-08-29 22:03:44,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 49 remaining) [2023-08-29 22:03:44,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2023-08-29 22:03:44,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2023-08-29 22:03:44,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 49 remaining) [2023-08-29 22:03:44,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 49 remaining) [2023-08-29 22:03:44,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2023-08-29 22:03:44,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 49 remaining) [2023-08-29 22:03:44,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 22:03:44,135 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:44,136 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 22:03:44,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:44,181 INFO L130 PetriNetUnfolder]: 72/501 cut-off events. [2023-08-29 22:03:44,182 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:03:44,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 72/501 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2217 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 318. Up to 12 conditions per place. [2023-08-29 22:03:44,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:44,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 260 places, 296 transitions, 610 flow [2023-08-29 22:03:44,189 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:03:44,189 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 260 places, 296 transitions, 610 flow [2023-08-29 22:03:44,189 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 260 places, 296 transitions, 610 flow [2023-08-29 22:03:44,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 296 transitions, 610 flow [2023-08-29 22:03:44,232 INFO L130 PetriNetUnfolder]: 71/499 cut-off events. [2023-08-29 22:03:44,232 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:03:44,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 499 events. 71/499 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2231 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 316. Up to 12 conditions per place. [2023-08-29 22:03:44,245 INFO L119 LiptonReduction]: Number of co-enabled transitions 35376 [2023-08-29 22:03:50,078 INFO L134 LiptonReduction]: Checked pairs total: 89368 [2023-08-29 22:03:50,078 INFO L136 LiptonReduction]: Total number of compositions: 263 [2023-08-29 22:03:50,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 22:03:50,080 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;@57feee0f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:03:50,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 22:03:50,090 INFO L130 PetriNetUnfolder]: 37/152 cut-off events. [2023-08-29 22:03:50,090 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:03:50,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:50,091 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 22:03:50,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 22:03:50,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:50,091 INFO L85 PathProgramCache]: Analyzing trace with hash -423117587, now seen corresponding path program 1 times [2023-08-29 22:03:50,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:50,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207241399] [2023-08-29 22:03:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:50,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:03:50,104 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 22:03:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:03:50,121 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 22:03:50,121 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 22:03:50,121 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 22:03:50,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 22:03:50,122 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 22:03:50,122 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 22:03:50,123 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 22:03:50,123 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 22:03:50,162 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 22:03:50,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 367 transitions, 764 flow [2023-08-29 22:03:50,267 INFO L130 PetriNetUnfolder]: 106/727 cut-off events. [2023-08-29 22:03:50,267 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 22:03:50,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 727 events. 106/727 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3476 event pairs, 1 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-08-29 22:03:50,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 319 places, 367 transitions, 764 flow [2023-08-29 22:03:50,285 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 319 places, 367 transitions, 764 flow [2023-08-29 22:03:50,286 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:03:50,286 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 319 places, 367 transitions, 764 flow [2023-08-29 22:03:50,286 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 319 places, 367 transitions, 764 flow [2023-08-29 22:03:50,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 367 transitions, 764 flow [2023-08-29 22:03:50,393 INFO L130 PetriNetUnfolder]: 106/727 cut-off events. [2023-08-29 22:03:50,393 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 22:03:50,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 727 events. 106/727 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3476 event pairs, 1 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-08-29 22:03:50,431 INFO L119 LiptonReduction]: Number of co-enabled transitions 67134 [2023-08-29 22:03:58,651 INFO L134 LiptonReduction]: Checked pairs total: 198107 [2023-08-29 22:03:58,651 INFO L136 LiptonReduction]: Total number of compositions: 319 [2023-08-29 22:03:58,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:03:58,652 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;@57feee0f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:03:58,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2023-08-29 22:03:58,654 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 22:03:58,654 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:58,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:58,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:03:58,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:03:58,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash 87491, now seen corresponding path program 1 times [2023-08-29 22:03:58,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:58,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402086827] [2023-08-29 22:03:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:58,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:58,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:58,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402086827] [2023-08-29 22:03:58,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402086827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:58,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:58,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:03:58,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752585536] [2023-08-29 22:03:58,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:58,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:58,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:58,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:58,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:58,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 686 [2023-08-29 22:03:58,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 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) [2023-08-29 22:03:58,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:58,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 686 [2023-08-29 22:03:58,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:05:15,608 INFO L130 PetriNetUnfolder]: 855376/1218191 cut-off events. [2023-08-29 22:05:15,609 INFO L131 PetriNetUnfolder]: For 6279/6279 co-relation queries the response was YES. [2023-08-29 22:05:18,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2346139 conditions, 1218191 events. 855376/1218191 cut-off events. For 6279/6279 co-relation queries the response was YES. Maximal size of possible extension queue 38335. Compared 11651287 event pairs, 795092 based on Foata normal form. 102856/908987 useless extension candidates. Maximal degree in co-relation 180047. Up to 1084415 conditions per place. [2023-08-29 22:05:24,857 INFO L137 encePairwiseOnDemand]: 632/686 looper letters, 156 selfloop transitions, 1 changer transitions 2/185 dead transitions. [2023-08-29 22:05:24,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 185 transitions, 718 flow [2023-08-29 22:05:24,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:05:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:05:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1162 transitions. [2023-08-29 22:05:24,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2023-08-29 22:05:24,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1162 transitions. [2023-08-29 22:05:24,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1162 transitions. [2023-08-29 22:05:24,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:05:24,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1162 transitions. [2023-08-29 22:05:24,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 387.3333333333333) internal successors, (1162), 3 states have internal predecessors, (1162), 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) [2023-08-29 22:05:24,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 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) [2023-08-29 22:05:24,881 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 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) [2023-08-29 22:05:24,881 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 380 flow. Second operand 3 states and 1162 transitions. [2023-08-29 22:05:24,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 185 transitions, 718 flow [2023-08-29 22:05:24,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 185 transitions, 718 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:05:24,887 INFO L231 Difference]: Finished difference. Result has 126 places, 123 transitions, 281 flow [2023-08-29 22:05:24,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=126, PETRI_TRANSITIONS=123} [2023-08-29 22:05:24,887 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -7 predicate places. [2023-08-29 22:05:24,888 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 123 transitions, 281 flow [2023-08-29 22:05:24,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 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) [2023-08-29 22:05:24,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:05:24,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:05:24,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 22:05:24,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:05:24,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:05:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash 88051, now seen corresponding path program 1 times [2023-08-29 22:05:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:05:24,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059356213] [2023-08-29 22:05:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:05:24,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:05:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:05:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:05:24,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:05:24,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059356213] [2023-08-29 22:05:24,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059356213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:05:24,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:05:24,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:05:24,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842110889] [2023-08-29 22:05:24,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:05:24,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:05:24,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:05:24,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:05:24,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:05:25,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 686 [2023-08-29 22:05:25,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 123 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 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) [2023-08-29 22:05:25,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:05:25,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 686 [2023-08-29 22:05:25,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:06:40,630 INFO L130 PetriNetUnfolder]: 765926/1099963 cut-off events. [2023-08-29 22:06:40,630 INFO L131 PetriNetUnfolder]: For 16905/16905 co-relation queries the response was YES. [2023-08-29 22:06:43,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2132936 conditions, 1099963 events. 765926/1099963 cut-off events. For 16905/16905 co-relation queries the response was YES. Maximal size of possible extension queue 35310. Compared 10630139 event pairs, 680865 based on Foata normal form. 0/749175 useless extension candidates. Maximal degree in co-relation 2043099. Up to 928585 conditions per place. [2023-08-29 22:06:47,560 INFO L137 encePairwiseOnDemand]: 682/686 looper letters, 152 selfloop transitions, 2 changer transitions 0/181 dead transitions. [2023-08-29 22:06:47,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 181 transitions, 705 flow [2023-08-29 22:06:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:06:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:06:47,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1065 transitions. [2023-08-29 22:06:47,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174927113702624 [2023-08-29 22:06:47,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1065 transitions. [2023-08-29 22:06:47,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1065 transitions. [2023-08-29 22:06:47,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:06:47,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1065 transitions. [2023-08-29 22:06:47,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 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) [2023-08-29 22:06:47,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 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) [2023-08-29 22:06:47,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 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) [2023-08-29 22:06:47,567 INFO L175 Difference]: Start difference. First operand has 126 places, 123 transitions, 281 flow. Second operand 3 states and 1065 transitions. [2023-08-29 22:06:47,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 181 transitions, 705 flow [2023-08-29 22:08:49,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 181 transitions, 701 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 22:08:49,757 INFO L231 Difference]: Finished difference. Result has 124 places, 121 transitions, 277 flow [2023-08-29 22:08:49,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=124, PETRI_TRANSITIONS=121} [2023-08-29 22:08:49,757 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -9 predicate places. [2023-08-29 22:08:49,757 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 121 transitions, 277 flow [2023-08-29 22:08:49,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 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) [2023-08-29 22:08:49,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:08:49,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:08:49,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 22:08:49,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:08:49,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:08:49,758 INFO L85 PathProgramCache]: Analyzing trace with hash 88052, now seen corresponding path program 1 times [2023-08-29 22:08:49,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:08:49,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958882364] [2023-08-29 22:08:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:08:49,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:08:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:08:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:08:49,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:08:49,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958882364] [2023-08-29 22:08:49,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958882364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:08:49,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:08:49,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:08:49,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144718441] [2023-08-29 22:08:49,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:08:49,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:08:49,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:08:49,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:08:49,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:08:49,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 686 [2023-08-29 22:08:49,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 121 transitions, 277 flow. Second operand has 3 states, 3 states have (on average 306.6666666666667) internal successors, (920), 3 states have internal predecessors, (920), 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) [2023-08-29 22:08:49,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:08:49,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 686 [2023-08-29 22:08:49,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:09:52,988 INFO L130 PetriNetUnfolder]: 766631/1095081 cut-off events. [2023-08-29 22:09:52,988 INFO L131 PetriNetUnfolder]: For 15590/15590 co-relation queries the response was YES. [2023-08-29 22:09:54,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2128166 conditions, 1095081 events. 766631/1095081 cut-off events. For 15590/15590 co-relation queries the response was YES. Maximal size of possible extension queue 34719. Compared 10414167 event pairs, 485957 based on Foata normal form. 0/753657 useless extension candidates. Maximal degree in co-relation 1941797. Up to 1007747 conditions per place. [2023-08-29 22:09:58,903 INFO L137 encePairwiseOnDemand]: 682/686 looper letters, 114 selfloop transitions, 2 changer transitions 0/143 dead transitions. [2023-08-29 22:09:58,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 143 transitions, 553 flow [2023-08-29 22:09:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:09:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:09:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1036 transitions. [2023-08-29 22:09:58,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2023-08-29 22:09:58,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1036 transitions. [2023-08-29 22:09:58,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1036 transitions. [2023-08-29 22:09:58,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:09:58,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1036 transitions. [2023-08-29 22:09:58,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 345.3333333333333) internal successors, (1036), 3 states have internal predecessors, (1036), 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) [2023-08-29 22:09:58,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 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) [2023-08-29 22:09:58,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 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) [2023-08-29 22:09:58,909 INFO L175 Difference]: Start difference. First operand has 124 places, 121 transitions, 277 flow. Second operand 3 states and 1036 transitions. [2023-08-29 22:09:58,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 143 transitions, 553 flow [2023-08-29 22:10:01,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 143 transitions, 549 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:10:01,395 INFO L231 Difference]: Finished difference. Result has 125 places, 122 transitions, 287 flow [2023-08-29 22:10:01,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=125, PETRI_TRANSITIONS=122} [2023-08-29 22:10:01,395 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -8 predicate places. [2023-08-29 22:10:01,395 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 122 transitions, 287 flow [2023-08-29 22:10:01,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 306.6666666666667) internal successors, (920), 3 states have internal predecessors, (920), 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) [2023-08-29 22:10:01,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:10:01,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:10:01,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 22:10:01,396 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:10:01,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:10:01,396 INFO L85 PathProgramCache]: Analyzing trace with hash -214301463, now seen corresponding path program 1 times [2023-08-29 22:10:01,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:10:01,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419872472] [2023-08-29 22:10:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:10:01,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:10:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:10:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:10:01,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:10:01,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419872472] [2023-08-29 22:10:01,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419872472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:10:01,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:10:01,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:10:01,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657354811] [2023-08-29 22:10:01,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:10:01,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:10:01,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:10:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:10:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:10:01,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 686 [2023-08-29 22:10:01,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 122 transitions, 287 flow. Second operand has 4 states, 4 states have (on average 293.5) internal successors, (1174), 4 states have internal predecessors, (1174), 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) [2023-08-29 22:10:01,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:10:01,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 686 [2023-08-29 22:10:01,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:10:44,303 INFO L130 PetriNetUnfolder]: 487709/702474 cut-off events. [2023-08-29 22:10:44,304 INFO L131 PetriNetUnfolder]: For 16827/16827 co-relation queries the response was YES. [2023-08-29 22:10:45,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1367067 conditions, 702474 events. 487709/702474 cut-off events. For 16827/16827 co-relation queries the response was YES. Maximal size of possible extension queue 22062. Compared 6532255 event pairs, 428127 based on Foata normal form. 45453/540894 useless extension candidates. Maximal degree in co-relation 1366938. Up to 585902 conditions per place. [2023-08-29 22:10:48,276 INFO L137 encePairwiseOnDemand]: 675/686 looper letters, 135 selfloop transitions, 2 changer transitions 0/164 dead transitions. [2023-08-29 22:10:48,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 164 transitions, 645 flow [2023-08-29 22:10:48,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:10:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:10:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1322 transitions. [2023-08-29 22:10:48,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48177842565597667 [2023-08-29 22:10:48,278 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1322 transitions. [2023-08-29 22:10:48,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1322 transitions. [2023-08-29 22:10:48,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:10:48,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1322 transitions. [2023-08-29 22:10:48,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 330.5) internal successors, (1322), 4 states have internal predecessors, (1322), 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) [2023-08-29 22:10:48,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 686.0) internal successors, (3430), 5 states have internal predecessors, (3430), 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) [2023-08-29 22:10:48,282 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 686.0) internal successors, (3430), 5 states have internal predecessors, (3430), 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) [2023-08-29 22:10:48,282 INFO L175 Difference]: Start difference. First operand has 125 places, 122 transitions, 287 flow. Second operand 4 states and 1322 transitions. [2023-08-29 22:10:48,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 164 transitions, 645 flow [2023-08-29 22:10:48,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 164 transitions, 643 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:10:48,294 INFO L231 Difference]: Finished difference. Result has 118 places, 113 transitions, 271 flow [2023-08-29 22:10:48,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2023-08-29 22:10:48,295 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -15 predicate places. [2023-08-29 22:10:48,295 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 271 flow [2023-08-29 22:10:48,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 293.5) internal successors, (1174), 4 states have internal predecessors, (1174), 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) [2023-08-29 22:10:48,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:10:48,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:10:48,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 22:10:48,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:10:48,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:10:48,296 INFO L85 PathProgramCache]: Analyzing trace with hash -214700887, now seen corresponding path program 1 times [2023-08-29 22:10:48,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:10:48,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709831648] [2023-08-29 22:10:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:10:48,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:10:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:10:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:10:48,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:10:48,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709831648] [2023-08-29 22:10:48,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709831648] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:10:48,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791597809] [2023-08-29 22:10:48,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:10:48,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:10:48,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:10:48,390 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) [2023-08-29 22:10:48,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 22:10:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:10:48,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:10:48,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:10:48,571 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-29 22:10:48,581 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 0 case distinctions, treesize of input 110 treesize of output 106 [2023-08-29 22:10:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:10:48,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:10:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:10:48,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791597809] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:10:48,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:10:48,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 22:10:48,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817665844] [2023-08-29 22:10:48,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:10:48,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:10:48,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:10:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:10:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:10:48,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 686 [2023-08-29 22:10:48,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 271 flow. Second operand has 8 states, 8 states have (on average 304.875) internal successors, (2439), 8 states have internal predecessors, (2439), 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) [2023-08-29 22:10:48,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:10:48,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 686 [2023-08-29 22:10:48,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:11:24,407 INFO L130 PetriNetUnfolder]: 457064/662858 cut-off events. [2023-08-29 22:11:24,408 INFO L131 PetriNetUnfolder]: For 26507/26507 co-relation queries the response was YES. [2023-08-29 22:11:25,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1324879 conditions, 662858 events. 457064/662858 cut-off events. For 26507/26507 co-relation queries the response was YES. Maximal size of possible extension queue 20822. Compared 6280838 event pairs, 7117 based on Foata normal form. 18/482453 useless extension candidates. Maximal degree in co-relation 1202424. Up to 524255 conditions per place. [2023-08-29 22:11:27,856 INFO L137 encePairwiseOnDemand]: 681/686 looper letters, 262 selfloop transitions, 6 changer transitions 0/295 dead transitions. [2023-08-29 22:11:27,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 295 transitions, 1181 flow [2023-08-29 22:11:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:11:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:11:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2090 transitions. [2023-08-29 22:11:27,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077745383867833 [2023-08-29 22:11:27,859 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2090 transitions. [2023-08-29 22:11:27,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2090 transitions. [2023-08-29 22:11:27,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:11:27,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2090 transitions. [2023-08-29 22:11:27,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 348.3333333333333) internal successors, (2090), 6 states have internal predecessors, (2090), 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) [2023-08-29 22:11:27,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 686.0) internal successors, (4802), 7 states have internal predecessors, (4802), 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) [2023-08-29 22:11:27,863 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 686.0) internal successors, (4802), 7 states have internal predecessors, (4802), 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) [2023-08-29 22:11:27,863 INFO L175 Difference]: Start difference. First operand has 118 places, 113 transitions, 271 flow. Second operand 6 states and 2090 transitions. [2023-08-29 22:11:27,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 295 transitions, 1181 flow [2023-08-29 22:11:36,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 295 transitions, 1177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:11:36,457 INFO L231 Difference]: Finished difference. Result has 121 places, 114 transitions, 287 flow [2023-08-29 22:11:36,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=121, PETRI_TRANSITIONS=114} [2023-08-29 22:11:36,457 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -12 predicate places. [2023-08-29 22:11:36,457 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 114 transitions, 287 flow [2023-08-29 22:11:36,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 304.875) internal successors, (2439), 8 states have internal predecessors, (2439), 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) [2023-08-29 22:11:36,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:11:36,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:11:36,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 22:11:36,658 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,SelfDestructingSolverStorable27 [2023-08-29 22:11:36,659 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:11:36,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:11:36,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1946586637, now seen corresponding path program 1 times [2023-08-29 22:11:36,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:11:36,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639781241] [2023-08-29 22:11:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:11:36,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:11:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:11:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:11:36,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:11:36,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639781241] [2023-08-29 22:11:36,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639781241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:11:36,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:11:36,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:11:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352783851] [2023-08-29 22:11:36,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:11:36,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:11:36,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:11:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:11:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:11:36,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 686 [2023-08-29 22:11:36,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 114 transitions, 287 flow. Second operand has 4 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 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) [2023-08-29 22:11:36,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:11:36,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 686 [2023-08-29 22:11:36,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:12:05,184 INFO L130 PetriNetUnfolder]: 343126/486980 cut-off events. [2023-08-29 22:12:05,184 INFO L131 PetriNetUnfolder]: For 27925/27925 co-relation queries the response was YES. [2023-08-29 22:12:06,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988796 conditions, 486980 events. 343126/486980 cut-off events. For 27925/27925 co-relation queries the response was YES. Maximal size of possible extension queue 13603. Compared 4114500 event pairs, 280950 based on Foata normal form. 0/401874 useless extension candidates. Maximal degree in co-relation 69602. Up to 406501 conditions per place. [2023-08-29 22:12:07,834 INFO L137 encePairwiseOnDemand]: 651/686 looper letters, 117 selfloop transitions, 21 changer transitions 0/158 dead transitions. [2023-08-29 22:12:07,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 158 transitions, 652 flow [2023-08-29 22:12:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:12:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:12:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 969 transitions. [2023-08-29 22:12:07,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708454810495627 [2023-08-29 22:12:07,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 969 transitions. [2023-08-29 22:12:07,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 969 transitions. [2023-08-29 22:12:07,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:12:07,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 969 transitions. [2023-08-29 22:12:07,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 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) [2023-08-29 22:12:07,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 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) [2023-08-29 22:12:07,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 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) [2023-08-29 22:12:07,838 INFO L175 Difference]: Start difference. First operand has 121 places, 114 transitions, 287 flow. Second operand 3 states and 969 transitions. [2023-08-29 22:12:07,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 158 transitions, 652 flow [2023-08-29 22:12:07,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 158 transitions, 645 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 22:12:07,844 INFO L231 Difference]: Finished difference. Result has 123 places, 132 transitions, 466 flow [2023-08-29 22:12:07,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=466, PETRI_PLACES=123, PETRI_TRANSITIONS=132} [2023-08-29 22:12:07,845 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -10 predicate places. [2023-08-29 22:12:07,845 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 132 transitions, 466 flow [2023-08-29 22:12:07,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 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) [2023-08-29 22:12:07,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:12:07,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:12:07,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-29 22:12:07,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:12:07,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:12:07,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1946586986, now seen corresponding path program 1 times [2023-08-29 22:12:07,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:12:07,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858977265] [2023-08-29 22:12:07,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:12:07,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:12:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:12:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:12:07,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:12:07,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858977265] [2023-08-29 22:12:07,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858977265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:12:07,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:12:07,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:12:07,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921235860] [2023-08-29 22:12:07,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:12:07,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:12:07,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:12:07,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:12:07,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:12:08,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 686 [2023-08-29 22:12:08,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 132 transitions, 466 flow. Second operand has 4 states, 4 states have (on average 298.75) internal successors, (1195), 4 states have internal predecessors, (1195), 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) [2023-08-29 22:12:08,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:12:08,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 686 [2023-08-29 22:12:08,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:12:49,321 INFO L130 PetriNetUnfolder]: 450635/657367 cut-off events. [2023-08-29 22:12:49,321 INFO L131 PetriNetUnfolder]: For 176545/183231 co-relation queries the response was YES. [2023-08-29 22:12:51,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1549205 conditions, 657367 events. 450635/657367 cut-off events. For 176545/183231 co-relation queries the response was YES. Maximal size of possible extension queue 21199. Compared 6114209 event pairs, 121717 based on Foata normal form. 136/570110 useless extension candidates. Maximal degree in co-relation 1124825. Up to 398498 conditions per place. [2023-08-29 22:12:53,336 INFO L137 encePairwiseOnDemand]: 669/686 looper letters, 220 selfloop transitions, 28 changer transitions 0/277 dead transitions. [2023-08-29 22:12:53,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 277 transitions, 1452 flow [2023-08-29 22:12:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:12:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:12:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1405 transitions. [2023-08-29 22:12:53,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120262390670554 [2023-08-29 22:12:53,338 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1405 transitions. [2023-08-29 22:12:53,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1405 transitions. [2023-08-29 22:12:53,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:12:53,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1405 transitions. [2023-08-29 22:12:53,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 351.25) internal successors, (1405), 4 states have internal predecessors, (1405), 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) [2023-08-29 22:12:53,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 686.0) internal successors, (3430), 5 states have internal predecessors, (3430), 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) [2023-08-29 22:12:53,341 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 686.0) internal successors, (3430), 5 states have internal predecessors, (3430), 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) [2023-08-29 22:12:53,341 INFO L175 Difference]: Start difference. First operand has 123 places, 132 transitions, 466 flow. Second operand 4 states and 1405 transitions. [2023-08-29 22:12:53,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 277 transitions, 1452 flow [2023-08-29 22:12:57,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 277 transitions, 1376 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:12:57,601 INFO L231 Difference]: Finished difference. Result has 127 places, 159 transitions, 704 flow [2023-08-29 22:12:57,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=704, PETRI_PLACES=127, PETRI_TRANSITIONS=159} [2023-08-29 22:12:57,601 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -6 predicate places. [2023-08-29 22:12:57,601 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 159 transitions, 704 flow [2023-08-29 22:12:57,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.75) internal successors, (1195), 4 states have internal predecessors, (1195), 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) [2023-08-29 22:12:57,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:12:57,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 22:12:57,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-29 22:12:57,602 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:12:57,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:12:57,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1101185257, now seen corresponding path program 1 times [2023-08-29 22:12:57,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:12:57,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096200133] [2023-08-29 22:12:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:12:57,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:12:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:12:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:12:57,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:12:57,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096200133] [2023-08-29 22:12:57,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096200133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:12:57,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903930804] [2023-08-29 22:12:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:12:57,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:12:57,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:12:57,660 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) [2023-08-29 22:12:57,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 22:12:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:12:57,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 22:12:57,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:12:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:12:57,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:12:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:12:57,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903930804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:12:57,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:12:57,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 22:12:57,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797918884] [2023-08-29 22:12:57,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:12:57,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:12:57,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:12:57,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:12:57,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:12:57,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 686 [2023-08-29 22:12:57,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 159 transitions, 704 flow. Second operand has 8 states, 8 states have (on average 308.25) internal successors, (2466), 8 states have internal predecessors, (2466), 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) [2023-08-29 22:12:57,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:12:57,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 686 [2023-08-29 22:12:57,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:01,269 INFO L130 PetriNetUnfolder]: 35346/54662 cut-off events. [2023-08-29 22:13:01,269 INFO L131 PetriNetUnfolder]: For 65867/66458 co-relation queries the response was YES. [2023-08-29 22:13:01,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160759 conditions, 54662 events. 35346/54662 cut-off events. For 65867/66458 co-relation queries the response was YES. Maximal size of possible extension queue 2276. Compared 435099 event pairs, 3208 based on Foata normal form. 4984/56821 useless extension candidates. Maximal degree in co-relation 45973. Up to 35059 conditions per place. [2023-08-29 22:13:01,480 INFO L137 encePairwiseOnDemand]: 683/686 looper letters, 159 selfloop transitions, 4 changer transitions 2/180 dead transitions. [2023-08-29 22:13:01,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 180 transitions, 1112 flow [2023-08-29 22:13:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:13:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:13:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1971 transitions. [2023-08-29 22:13:01,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47886297376093295 [2023-08-29 22:13:01,483 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1971 transitions. [2023-08-29 22:13:01,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1971 transitions. [2023-08-29 22:13:01,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:01,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1971 transitions. [2023-08-29 22:13:01,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 328.5) internal successors, (1971), 6 states have internal predecessors, (1971), 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) [2023-08-29 22:13:01,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 686.0) internal successors, (4802), 7 states have internal predecessors, (4802), 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) [2023-08-29 22:13:01,487 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 686.0) internal successors, (4802), 7 states have internal predecessors, (4802), 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) [2023-08-29 22:13:01,487 INFO L175 Difference]: Start difference. First operand has 127 places, 159 transitions, 704 flow. Second operand 6 states and 1971 transitions. [2023-08-29 22:13:01,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 180 transitions, 1112 flow [2023-08-29 22:13:01,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 180 transitions, 1099 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-29 22:13:01,516 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 325 flow [2023-08-29 22:13:01,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2023-08-29 22:13:01,517 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -51 predicate places. [2023-08-29 22:13:01,517 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 325 flow [2023-08-29 22:13:01,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 308.25) internal successors, (2466), 8 states have internal predecessors, (2466), 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) [2023-08-29 22:13:01,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:01,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:13:01,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:13:01,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:01,725 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:01,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:01,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2046400102, now seen corresponding path program 1 times [2023-08-29 22:13:01,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:01,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315632076] [2023-08-29 22:13:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:01,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:13:01,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:01,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315632076] [2023-08-29 22:13:01,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315632076] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:13:01,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410981759] [2023-08-29 22:13:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:01,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:01,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:13:01,811 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) [2023-08-29 22:13:01,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 22:13:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:01,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:13:01,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:13:01,971 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 [2023-08-29 22:13:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:13:02,001 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 [2023-08-29 22:13:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:13:02,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:13:02,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410981759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:13:02,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:13:02,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-29 22:13:02,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602292166] [2023-08-29 22:13:02,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:13:02,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:13:02,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:02,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:13:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:13:02,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 686 [2023-08-29 22:13:02,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 282.0) internal successors, (1410), 5 states have internal predecessors, (1410), 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) [2023-08-29 22:13:02,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:02,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 686 [2023-08-29 22:13:02,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:03,828 INFO L130 PetriNetUnfolder]: 16500/26537 cut-off events. [2023-08-29 22:13:03,828 INFO L131 PetriNetUnfolder]: For 16942/16944 co-relation queries the response was YES. [2023-08-29 22:13:03,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70795 conditions, 26537 events. 16500/26537 cut-off events. For 16942/16944 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 199295 event pairs, 4765 based on Foata normal form. 4101/28447 useless extension candidates. Maximal degree in co-relation 16159. Up to 17155 conditions per place. [2023-08-29 22:13:03,910 INFO L137 encePairwiseOnDemand]: 667/686 looper letters, 66 selfloop transitions, 19 changer transitions 0/95 dead transitions. [2023-08-29 22:13:03,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 95 transitions, 561 flow [2023-08-29 22:13:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:13:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:13:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1193 transitions. [2023-08-29 22:13:03,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4347667638483965 [2023-08-29 22:13:03,912 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1193 transitions. [2023-08-29 22:13:03,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1193 transitions. [2023-08-29 22:13:03,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:03,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1193 transitions. [2023-08-29 22:13:03,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 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) [2023-08-29 22:13:03,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 686.0) internal successors, (3430), 5 states have internal predecessors, (3430), 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) [2023-08-29 22:13:03,916 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 686.0) internal successors, (3430), 5 states have internal predecessors, (3430), 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) [2023-08-29 22:13:03,916 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 325 flow. Second operand 4 states and 1193 transitions. [2023-08-29 22:13:03,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 95 transitions, 561 flow [2023-08-29 22:13:03,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 95 transitions, 490 flow, removed 29 selfloop flow, removed 5 redundant places. [2023-08-29 22:13:03,944 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 297 flow [2023-08-29 22:13:03,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=297, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2023-08-29 22:13:03,945 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -53 predicate places. [2023-08-29 22:13:03,945 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 297 flow [2023-08-29 22:13:03,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.0) internal successors, (1410), 5 states have internal predecessors, (1410), 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) [2023-08-29 22:13:03,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:03,945 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:13:03,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:13:04,145 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,SelfDestructingSolverStorable31 [2023-08-29 22:13:04,146 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:04,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1052678387, now seen corresponding path program 1 times [2023-08-29 22:13:04,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:04,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554376174] [2023-08-29 22:13:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:04,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:13:04,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:04,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554376174] [2023-08-29 22:13:04,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554376174] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:13:04,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:13:04,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:13:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185857065] [2023-08-29 22:13:04,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:13:04,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:13:04,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:04,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:13:04,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:13:04,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 686 [2023-08-29 22:13:04,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 297 flow. Second operand has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 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) [2023-08-29 22:13:04,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:04,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 686 [2023-08-29 22:13:04,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:05,816 INFO L130 PetriNetUnfolder]: 13893/24841 cut-off events. [2023-08-29 22:13:05,817 INFO L131 PetriNetUnfolder]: For 13714/13714 co-relation queries the response was YES. [2023-08-29 22:13:05,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65560 conditions, 24841 events. 13893/24841 cut-off events. For 13714/13714 co-relation queries the response was YES. Maximal size of possible extension queue 1383. Compared 219878 event pairs, 4752 based on Foata normal form. 915/24087 useless extension candidates. Maximal degree in co-relation 37187. Up to 12897 conditions per place. [2023-08-29 22:13:05,925 INFO L137 encePairwiseOnDemand]: 671/686 looper letters, 101 selfloop transitions, 15 changer transitions 1/132 dead transitions. [2023-08-29 22:13:05,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 132 transitions, 766 flow [2023-08-29 22:13:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:13:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:13:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 959 transitions. [2023-08-29 22:13:05,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2023-08-29 22:13:05,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 959 transitions. [2023-08-29 22:13:05,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 959 transitions. [2023-08-29 22:13:05,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:05,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 959 transitions. [2023-08-29 22:13:05,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 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) [2023-08-29 22:13:05,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 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) [2023-08-29 22:13:05,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 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) [2023-08-29 22:13:05,930 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 297 flow. Second operand 3 states and 959 transitions. [2023-08-29 22:13:05,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 132 transitions, 766 flow [2023-08-29 22:13:05,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 132 transitions, 734 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:13:05,938 INFO L231 Difference]: Finished difference. Result has 81 places, 88 transitions, 380 flow [2023-08-29 22:13:05,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=81, PETRI_TRANSITIONS=88} [2023-08-29 22:13:05,938 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -52 predicate places. [2023-08-29 22:13:05,938 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 88 transitions, 380 flow [2023-08-29 22:13:05,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 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) [2023-08-29 22:13:05,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:05,939 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:13:05,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-29 22:13:05,939 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:05,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:05,939 INFO L85 PathProgramCache]: Analyzing trace with hash -899761677, now seen corresponding path program 2 times [2023-08-29 22:13:05,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:05,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507169306] [2023-08-29 22:13:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:05,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:13:06,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:06,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507169306] [2023-08-29 22:13:06,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507169306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:13:06,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:13:06,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:13:06,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597457400] [2023-08-29 22:13:06,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:13:06,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:13:06,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:06,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:13:06,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:13:06,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 686 [2023-08-29 22:13:06,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 88 transitions, 380 flow. Second operand has 5 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 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) [2023-08-29 22:13:06,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:06,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 686 [2023-08-29 22:13:06,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:06,351 INFO L130 PetriNetUnfolder]: 828/2174 cut-off events. [2023-08-29 22:13:06,351 INFO L131 PetriNetUnfolder]: For 1878/1878 co-relation queries the response was YES. [2023-08-29 22:13:06,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6374 conditions, 2174 events. 828/2174 cut-off events. For 1878/1878 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 16092 event pairs, 79 based on Foata normal form. 240/2321 useless extension candidates. Maximal degree in co-relation 3979. Up to 1602 conditions per place. [2023-08-29 22:13:06,356 INFO L137 encePairwiseOnDemand]: 679/686 looper letters, 56 selfloop transitions, 7 changer transitions 2/80 dead transitions. [2023-08-29 22:13:06,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 80 transitions, 466 flow [2023-08-29 22:13:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:13:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:13:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1206 transitions. [2023-08-29 22:13:06,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395043731778426 [2023-08-29 22:13:06,358 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1206 transitions. [2023-08-29 22:13:06,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1206 transitions. [2023-08-29 22:13:06,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:06,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1206 transitions. [2023-08-29 22:13:06,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 301.5) internal successors, (1206), 4 states have internal predecessors, (1206), 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) [2023-08-29 22:13:06,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 686.0) internal successors, (3430), 5 states have internal predecessors, (3430), 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) [2023-08-29 22:13:06,361 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 686.0) internal successors, (3430), 5 states have internal predecessors, (3430), 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) [2023-08-29 22:13:06,361 INFO L175 Difference]: Start difference. First operand has 81 places, 88 transitions, 380 flow. Second operand 4 states and 1206 transitions. [2023-08-29 22:13:06,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 80 transitions, 466 flow [2023-08-29 22:13:06,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 417 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-29 22:13:06,365 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 252 flow [2023-08-29 22:13:06,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2023-08-29 22:13:06,366 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -52 predicate places. [2023-08-29 22:13:06,366 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 252 flow [2023-08-29 22:13:06,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 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) [2023-08-29 22:13:06,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:06,366 INFO L208 CegarLoopForPetriNet]: 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] [2023-08-29 22:13:06,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-29 22:13:06,367 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:06,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:06,367 INFO L85 PathProgramCache]: Analyzing trace with hash 365353378, now seen corresponding path program 1 times [2023-08-29 22:13:06,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:06,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17741369] [2023-08-29 22:13:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:06,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:13:06,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:06,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17741369] [2023-08-29 22:13:06,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17741369] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:13:06,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558129483] [2023-08-29 22:13:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:06,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:06,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:13:06,588 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) [2023-08-29 22:13:06,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 22:13:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:06,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-29 22:13:06,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:13:06,799 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-29 22:13:06,816 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 22:13:06,817 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 118 [2023-08-29 22:13:06,851 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 [2023-08-29 22:13:06,868 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 [2023-08-29 22:13:06,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:06,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:13:06,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:13:06,998 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_827 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_827) |c_~#B~0.base|) |c_~#B~0.offset|) 0)) is different from false [2023-08-29 22:13:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-29 22:13:07,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558129483] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:13:07,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:13:07,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-29 22:13:07,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097585907] [2023-08-29 22:13:07,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:13:07,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:13:07,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:07,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:13:07,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=100, Unknown=1, NotChecked=20, Total=156 [2023-08-29 22:13:07,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 686 [2023-08-29 22:13:07,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 252 flow. Second operand has 13 states, 13 states have (on average 224.30769230769232) internal successors, (2916), 13 states have internal predecessors, (2916), 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) [2023-08-29 22:13:07,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:07,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 686 [2023-08-29 22:13:07,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:07,474 INFO L130 PetriNetUnfolder]: 1113/2897 cut-off events. [2023-08-29 22:13:07,475 INFO L131 PetriNetUnfolder]: For 1842/1842 co-relation queries the response was YES. [2023-08-29 22:13:07,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8080 conditions, 2897 events. 1113/2897 cut-off events. For 1842/1842 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 22769 event pairs, 340 based on Foata normal form. 26/2797 useless extension candidates. Maximal degree in co-relation 4639. Up to 1044 conditions per place. [2023-08-29 22:13:07,483 INFO L137 encePairwiseOnDemand]: 673/686 looper letters, 137 selfloop transitions, 21 changer transitions 13/184 dead transitions. [2023-08-29 22:13:07,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 184 transitions, 1014 flow [2023-08-29 22:13:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 22:13:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 22:13:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3033 transitions. [2023-08-29 22:13:07,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3400986768333707 [2023-08-29 22:13:07,486 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3033 transitions. [2023-08-29 22:13:07,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3033 transitions. [2023-08-29 22:13:07,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:07,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3033 transitions. [2023-08-29 22:13:07,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 233.30769230769232) internal successors, (3033), 13 states have internal predecessors, (3033), 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) [2023-08-29 22:13:07,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 686.0) internal successors, (9604), 14 states have internal predecessors, (9604), 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) [2023-08-29 22:13:07,494 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 686.0) internal successors, (9604), 14 states have internal predecessors, (9604), 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) [2023-08-29 22:13:07,494 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 252 flow. Second operand 13 states and 3033 transitions. [2023-08-29 22:13:07,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 184 transitions, 1014 flow [2023-08-29 22:13:07,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 184 transitions, 963 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:13:07,499 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 414 flow [2023-08-29 22:13:07,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=414, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2023-08-29 22:13:07,500 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -35 predicate places. [2023-08-29 22:13:07,500 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 414 flow [2023-08-29 22:13:07,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 224.30769230769232) internal successors, (2916), 13 states have internal predecessors, (2916), 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) [2023-08-29 22:13:07,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:07,501 INFO L208 CegarLoopForPetriNet]: 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] [2023-08-29 22:13:07,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-29 22:13:07,706 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,SelfDestructingSolverStorable34 [2023-08-29 22:13:07,707 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:07,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash 190346419, now seen corresponding path program 1 times [2023-08-29 22:13:07,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:07,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726013310] [2023-08-29 22:13:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:07,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:13:07,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:07,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726013310] [2023-08-29 22:13:07,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726013310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:13:07,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483913607] [2023-08-29 22:13:07,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:07,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:07,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:13:07,920 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) [2023-08-29 22:13:07,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-29 22:13:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-29 22:13:08,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:13:08,165 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 22:13:08,169 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 124 [2023-08-29 22:13:08,182 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 106 [2023-08-29 22:13:08,208 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 [2023-08-29 22:13:08,228 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 [2023-08-29 22:13:08,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:08,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:13:08,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:13:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:13:08,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483913607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:13:08,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:13:08,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-29 22:13:08,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727345498] [2023-08-29 22:13:08,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:13:08,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:13:08,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:08,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:13:08,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=116, Unknown=3, NotChecked=0, Total=156 [2023-08-29 22:13:09,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 686 [2023-08-29 22:13:09,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 414 flow. Second operand has 13 states, 13 states have (on average 224.30769230769232) internal successors, (2916), 13 states have internal predecessors, (2916), 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) [2023-08-29 22:13:09,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:09,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 686 [2023-08-29 22:13:09,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:09,884 INFO L130 PetriNetUnfolder]: 1390/3679 cut-off events. [2023-08-29 22:13:09,884 INFO L131 PetriNetUnfolder]: For 9050/9050 co-relation queries the response was YES. [2023-08-29 22:13:09,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12287 conditions, 3679 events. 1390/3679 cut-off events. For 9050/9050 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 30769 event pairs, 432 based on Foata normal form. 28/3548 useless extension candidates. Maximal degree in co-relation 11887. Up to 1543 conditions per place. [2023-08-29 22:13:09,896 INFO L137 encePairwiseOnDemand]: 673/686 looper letters, 155 selfloop transitions, 24 changer transitions 15/207 dead transitions. [2023-08-29 22:13:09,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 207 transitions, 1347 flow [2023-08-29 22:13:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 22:13:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 22:13:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3037 transitions. [2023-08-29 22:13:09,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34054720789414666 [2023-08-29 22:13:09,900 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3037 transitions. [2023-08-29 22:13:09,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3037 transitions. [2023-08-29 22:13:09,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:09,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3037 transitions. [2023-08-29 22:13:09,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 233.6153846153846) internal successors, (3037), 13 states have internal predecessors, (3037), 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) [2023-08-29 22:13:09,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 686.0) internal successors, (9604), 14 states have internal predecessors, (9604), 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) [2023-08-29 22:13:09,910 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 686.0) internal successors, (9604), 14 states have internal predecessors, (9604), 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) [2023-08-29 22:13:09,911 INFO L175 Difference]: Start difference. First operand has 98 places, 86 transitions, 414 flow. Second operand 13 states and 3037 transitions. [2023-08-29 22:13:09,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 207 transitions, 1347 flow [2023-08-29 22:13:09,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 207 transitions, 1329 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-29 22:13:09,923 INFO L231 Difference]: Finished difference. Result has 111 places, 101 transitions, 638 flow [2023-08-29 22:13:09,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=638, PETRI_PLACES=111, PETRI_TRANSITIONS=101} [2023-08-29 22:13:09,923 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -22 predicate places. [2023-08-29 22:13:09,924 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 101 transitions, 638 flow [2023-08-29 22:13:09,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 224.30769230769232) internal successors, (2916), 13 states have internal predecessors, (2916), 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) [2023-08-29 22:13:09,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:09,924 INFO L208 CegarLoopForPetriNet]: 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] [2023-08-29 22:13:09,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-29 22:13:10,130 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,SelfDestructingSolverStorable35 [2023-08-29 22:13:10,130 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:10,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1537826557, now seen corresponding path program 2 times [2023-08-29 22:13:10,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:10,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544747095] [2023-08-29 22:13:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:10,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:13:10,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:10,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544747095] [2023-08-29 22:13:10,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544747095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:13:10,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357273888] [2023-08-29 22:13:10,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:13:10,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:10,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:13:10,506 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) [2023-08-29 22:13:10,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-29 22:13:10,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:13:10,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:13:10,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-29 22:13:10,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:13:10,764 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 22:13:10,764 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 124 [2023-08-29 22:13:10,777 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 106 [2023-08-29 22:13:10,803 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 [2023-08-29 22:13:10,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:10,869 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 [2023-08-29 22:13:10,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:13:10,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:13:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:13:10,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357273888] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:13:10,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:13:10,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-29 22:13:10,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614357111] [2023-08-29 22:13:10,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:13:10,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:13:10,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:10,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:13:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:13:12,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 686 [2023-08-29 22:13:12,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 101 transitions, 638 flow. Second operand has 14 states, 14 states have (on average 295.7142857142857) internal successors, (4140), 14 states have internal predecessors, (4140), 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) [2023-08-29 22:13:12,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:12,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 686 [2023-08-29 22:13:12,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:12,638 INFO L130 PetriNetUnfolder]: 1402/3830 cut-off events. [2023-08-29 22:13:12,638 INFO L131 PetriNetUnfolder]: For 20539/20539 co-relation queries the response was YES. [2023-08-29 22:13:12,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14626 conditions, 3830 events. 1402/3830 cut-off events. For 20539/20539 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 32812 event pairs, 596 based on Foata normal form. 13/3674 useless extension candidates. Maximal degree in co-relation 14308. Up to 1457 conditions per place. [2023-08-29 22:13:12,651 INFO L137 encePairwiseOnDemand]: 673/686 looper letters, 124 selfloop transitions, 23 changer transitions 14/175 dead transitions. [2023-08-29 22:13:12,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 175 transitions, 1327 flow [2023-08-29 22:13:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:13:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:13:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2170 transitions. [2023-08-29 22:13:12,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518950437317784 [2023-08-29 22:13:12,653 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2170 transitions. [2023-08-29 22:13:12,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2170 transitions. [2023-08-29 22:13:12,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:12,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2170 transitions. [2023-08-29 22:13:12,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 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) [2023-08-29 22:13:12,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 686.0) internal successors, (5488), 8 states have internal predecessors, (5488), 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) [2023-08-29 22:13:12,663 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 686.0) internal successors, (5488), 8 states have internal predecessors, (5488), 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) [2023-08-29 22:13:12,663 INFO L175 Difference]: Start difference. First operand has 111 places, 101 transitions, 638 flow. Second operand 7 states and 2170 transitions. [2023-08-29 22:13:12,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 175 transitions, 1327 flow [2023-08-29 22:13:12,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 175 transitions, 1289 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-08-29 22:13:12,690 INFO L231 Difference]: Finished difference. Result has 114 places, 102 transitions, 667 flow [2023-08-29 22:13:12,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=667, PETRI_PLACES=114, PETRI_TRANSITIONS=102} [2023-08-29 22:13:12,691 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -19 predicate places. [2023-08-29 22:13:12,691 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 102 transitions, 667 flow [2023-08-29 22:13:12,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 295.7142857142857) internal successors, (4140), 14 states have internal predecessors, (4140), 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) [2023-08-29 22:13:12,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:12,692 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:13:12,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-29 22:13:12,898 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,SelfDestructingSolverStorable36 [2023-08-29 22:13:12,898 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:12,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:12,899 INFO L85 PathProgramCache]: Analyzing trace with hash 15090025, now seen corresponding path program 2 times [2023-08-29 22:13:12,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:12,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744292288] [2023-08-29 22:13:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:12,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:13:13,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:13,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744292288] [2023-08-29 22:13:13,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744292288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:13:13,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842055928] [2023-08-29 22:13:13,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:13:13,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:13,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:13:13,165 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) [2023-08-29 22:13:13,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-29 22:13:13,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:13:13,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:13:13,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 22:13:13,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:13:13,457 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 22:13:13,457 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 124 [2023-08-29 22:13:13,470 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 106 [2023-08-29 22:13:13,496 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 [2023-08-29 22:13:13,516 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 [2023-08-29 22:13:13,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:13,585 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 [2023-08-29 22:13:13,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:13:13,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:13:13,656 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1050 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1050) |c_~#B~0.base|) |c_~#B~0.offset|) 1)) is different from false [2023-08-29 22:13:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2023-08-29 22:13:13,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842055928] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:13:13,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:13:13,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-29 22:13:13,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970170596] [2023-08-29 22:13:13,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:13:13,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 22:13:13,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:13,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 22:13:13,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=140, Unknown=1, NotChecked=24, Total=210 [2023-08-29 22:13:13,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 686 [2023-08-29 22:13:13,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 102 transitions, 667 flow. Second operand has 15 states, 15 states have (on average 223.73333333333332) internal successors, (3356), 15 states have internal predecessors, (3356), 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) [2023-08-29 22:13:13,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:13,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 686 [2023-08-29 22:13:13,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:14,372 INFO L130 PetriNetUnfolder]: 1357/3723 cut-off events. [2023-08-29 22:13:14,373 INFO L131 PetriNetUnfolder]: For 20064/20064 co-relation queries the response was YES. [2023-08-29 22:13:14,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14432 conditions, 3723 events. 1357/3723 cut-off events. For 20064/20064 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 31492 event pairs, 621 based on Foata normal form. 11/3570 useless extension candidates. Maximal degree in co-relation 10546. Up to 1507 conditions per place. [2023-08-29 22:13:14,385 INFO L137 encePairwiseOnDemand]: 673/686 looper letters, 114 selfloop transitions, 19 changer transitions 20/166 dead transitions. [2023-08-29 22:13:14,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 166 transitions, 1302 flow [2023-08-29 22:13:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:13:14,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:13:14,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1660 transitions. [2023-08-29 22:13:14,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456892961266139 [2023-08-29 22:13:14,388 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1660 transitions. [2023-08-29 22:13:14,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1660 transitions. [2023-08-29 22:13:14,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:14,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1660 transitions. [2023-08-29 22:13:14,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 237.14285714285714) internal successors, (1660), 7 states have internal predecessors, (1660), 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) [2023-08-29 22:13:14,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 686.0) internal successors, (5488), 8 states have internal predecessors, (5488), 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) [2023-08-29 22:13:14,393 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 686.0) internal successors, (5488), 8 states have internal predecessors, (5488), 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) [2023-08-29 22:13:14,393 INFO L175 Difference]: Start difference. First operand has 114 places, 102 transitions, 667 flow. Second operand 7 states and 1660 transitions. [2023-08-29 22:13:14,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 166 transitions, 1302 flow [2023-08-29 22:13:14,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 166 transitions, 1262 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-29 22:13:14,414 INFO L231 Difference]: Finished difference. Result has 120 places, 99 transitions, 660 flow [2023-08-29 22:13:14,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=660, PETRI_PLACES=120, PETRI_TRANSITIONS=99} [2023-08-29 22:13:14,415 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -13 predicate places. [2023-08-29 22:13:14,415 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 99 transitions, 660 flow [2023-08-29 22:13:14,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 223.73333333333332) internal successors, (3356), 15 states have internal predecessors, (3356), 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) [2023-08-29 22:13:14,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:14,416 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:13:14,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-29 22:13:14,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:14,622 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:14,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:14,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1368962662, now seen corresponding path program 1 times [2023-08-29 22:13:14,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:14,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61003186] [2023-08-29 22:13:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:14,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:13:14,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:14,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61003186] [2023-08-29 22:13:14,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61003186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:13:14,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074640750] [2023-08-29 22:13:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:14,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:14,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:13:14,837 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) [2023-08-29 22:13:14,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-29 22:13:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:14,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 22:13:14,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:13:15,066 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-29 22:13:15,082 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 22:13:15,083 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 118 [2023-08-29 22:13:15,111 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 [2023-08-29 22:13:15,129 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 [2023-08-29 22:13:15,147 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 [2023-08-29 22:13:15,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:15,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:13:15,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:13:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:13:15,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074640750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:13:15,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:13:15,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-29 22:13:15,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509899313] [2023-08-29 22:13:15,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:13:15,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:13:15,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:15,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:13:15,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=117, Unknown=1, NotChecked=0, Total=156 [2023-08-29 22:13:15,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 686 [2023-08-29 22:13:15,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 99 transitions, 660 flow. Second operand has 13 states, 13 states have (on average 224.69230769230768) internal successors, (2921), 13 states have internal predecessors, (2921), 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) [2023-08-29 22:13:15,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:15,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 686 [2023-08-29 22:13:15,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:15,973 INFO L130 PetriNetUnfolder]: 1131/3177 cut-off events. [2023-08-29 22:13:15,973 INFO L131 PetriNetUnfolder]: For 17480/17480 co-relation queries the response was YES. [2023-08-29 22:13:15,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12421 conditions, 3177 events. 1131/3177 cut-off events. For 17480/17480 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 25824 event pairs, 397 based on Foata normal form. 16/3049 useless extension candidates. Maximal degree in co-relation 8956. Up to 1767 conditions per place. [2023-08-29 22:13:15,984 INFO L137 encePairwiseOnDemand]: 673/686 looper letters, 134 selfloop transitions, 19 changer transitions 18/184 dead transitions. [2023-08-29 22:13:15,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 184 transitions, 1452 flow [2023-08-29 22:13:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 22:13:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 22:13:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2568 transitions. [2023-08-29 22:13:15,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3403127484760138 [2023-08-29 22:13:15,989 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2568 transitions. [2023-08-29 22:13:15,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2568 transitions. [2023-08-29 22:13:15,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:15,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2568 transitions. [2023-08-29 22:13:15,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 233.45454545454547) internal successors, (2568), 11 states have internal predecessors, (2568), 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) [2023-08-29 22:13:15,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 686.0) internal successors, (8232), 12 states have internal predecessors, (8232), 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) [2023-08-29 22:13:15,997 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 686.0) internal successors, (8232), 12 states have internal predecessors, (8232), 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) [2023-08-29 22:13:15,997 INFO L175 Difference]: Start difference. First operand has 120 places, 99 transitions, 660 flow. Second operand 11 states and 2568 transitions. [2023-08-29 22:13:15,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 184 transitions, 1452 flow [2023-08-29 22:13:16,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 184 transitions, 1416 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-29 22:13:16,014 INFO L231 Difference]: Finished difference. Result has 131 places, 115 transitions, 896 flow [2023-08-29 22:13:16,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=896, PETRI_PLACES=131, PETRI_TRANSITIONS=115} [2023-08-29 22:13:16,015 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -2 predicate places. [2023-08-29 22:13:16,015 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 115 transitions, 896 flow [2023-08-29 22:13:16,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 224.69230769230768) internal successors, (2921), 13 states have internal predecessors, (2921), 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) [2023-08-29 22:13:16,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:16,016 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:13:16,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-29 22:13:16,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-29 22:13:16,222 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:16,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:16,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1258907241, now seen corresponding path program 2 times [2023-08-29 22:13:16,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:16,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717886220] [2023-08-29 22:13:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:16,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:13:16,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:16,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717886220] [2023-08-29 22:13:16,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717886220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:13:16,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:13:16,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:13:16,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167745539] [2023-08-29 22:13:16,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:13:16,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:13:16,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:16,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:13:16,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:13:16,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 686 [2023-08-29 22:13:16,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 115 transitions, 896 flow. Second operand has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 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) [2023-08-29 22:13:16,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:16,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 686 [2023-08-29 22:13:16,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:17,490 INFO L130 PetriNetUnfolder]: 1088/3163 cut-off events. [2023-08-29 22:13:17,490 INFO L131 PetriNetUnfolder]: For 19918/19924 co-relation queries the response was YES. [2023-08-29 22:13:17,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12704 conditions, 3163 events. 1088/3163 cut-off events. For 19918/19924 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 26107 event pairs, 469 based on Foata normal form. 6/3020 useless extension candidates. Maximal degree in co-relation 12389. Up to 1652 conditions per place. [2023-08-29 22:13:17,501 INFO L137 encePairwiseOnDemand]: 676/686 looper letters, 98 selfloop transitions, 18 changer transitions 15/146 dead transitions. [2023-08-29 22:13:17,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 146 transitions, 1281 flow [2023-08-29 22:13:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:13:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:13:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2136 transitions. [2023-08-29 22:13:17,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448146605581008 [2023-08-29 22:13:17,503 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2136 transitions. [2023-08-29 22:13:17,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2136 transitions. [2023-08-29 22:13:17,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:17,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2136 transitions. [2023-08-29 22:13:17,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 305.14285714285717) internal successors, (2136), 7 states have internal predecessors, (2136), 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) [2023-08-29 22:13:17,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 686.0) internal successors, (5488), 8 states have internal predecessors, (5488), 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) [2023-08-29 22:13:17,508 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 686.0) internal successors, (5488), 8 states have internal predecessors, (5488), 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) [2023-08-29 22:13:17,508 INFO L175 Difference]: Start difference. First operand has 131 places, 115 transitions, 896 flow. Second operand 7 states and 2136 transitions. [2023-08-29 22:13:17,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 146 transitions, 1281 flow [2023-08-29 22:13:17,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 146 transitions, 1167 flow, removed 57 selfloop flow, removed 0 redundant places. [2023-08-29 22:13:17,532 INFO L231 Difference]: Finished difference. Result has 140 places, 110 transitions, 796 flow [2023-08-29 22:13:17,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=796, PETRI_PLACES=140, PETRI_TRANSITIONS=110} [2023-08-29 22:13:17,533 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 7 predicate places. [2023-08-29 22:13:17,533 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 110 transitions, 796 flow [2023-08-29 22:13:17,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 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) [2023-08-29 22:13:17,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:17,533 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2023-08-29 22:13:17,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-29 22:13:17,534 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:17,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:17,534 INFO L85 PathProgramCache]: Analyzing trace with hash -808796940, now seen corresponding path program 1 times [2023-08-29 22:13:17,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:17,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446668728] [2023-08-29 22:13:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:17,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:13:17,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:17,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446668728] [2023-08-29 22:13:17,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446668728] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:13:17,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981208454] [2023-08-29 22:13:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:17,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:17,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:13:17,949 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) [2023-08-29 22:13:17,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-29 22:13:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:18,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-29 22:13:18,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:13:18,168 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 22:13:18,168 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 124 [2023-08-29 22:13:18,177 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 106 [2023-08-29 22:13:18,201 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 [2023-08-29 22:13:18,217 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 [2023-08-29 22:13:18,259 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 [2023-08-29 22:13:18,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:18,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:18,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:18,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:13:18,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:13:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:13:18,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981208454] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:13:18,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:13:18,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-29 22:13:18,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597338735] [2023-08-29 22:13:18,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:13:18,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 22:13:18,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:18,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 22:13:18,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=219, Unknown=1, NotChecked=0, Total=272 [2023-08-29 22:13:19,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 686 [2023-08-29 22:13:19,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 110 transitions, 796 flow. Second operand has 17 states, 17 states have (on average 221.1764705882353) internal successors, (3760), 17 states have internal predecessors, (3760), 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) [2023-08-29 22:13:19,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:19,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 686 [2023-08-29 22:13:19,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:19,643 INFO L130 PetriNetUnfolder]: 667/1915 cut-off events. [2023-08-29 22:13:19,643 INFO L131 PetriNetUnfolder]: For 9608/9610 co-relation queries the response was YES. [2023-08-29 22:13:19,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7348 conditions, 1915 events. 667/1915 cut-off events. For 9608/9610 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 13682 event pairs, 165 based on Foata normal form. 6/1827 useless extension candidates. Maximal degree in co-relation 7164. Up to 941 conditions per place. [2023-08-29 22:13:19,652 INFO L137 encePairwiseOnDemand]: 673/686 looper letters, 146 selfloop transitions, 47 changer transitions 28/234 dead transitions. [2023-08-29 22:13:19,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 234 transitions, 1961 flow [2023-08-29 22:13:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 22:13:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 22:13:19,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5163 transitions. [2023-08-29 22:13:19,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32722778552414755 [2023-08-29 22:13:19,656 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5163 transitions. [2023-08-29 22:13:19,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5163 transitions. [2023-08-29 22:13:19,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:19,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5163 transitions. [2023-08-29 22:13:19,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 224.47826086956522) internal successors, (5163), 23 states have internal predecessors, (5163), 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) [2023-08-29 22:13:19,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 686.0) internal successors, (16464), 24 states have internal predecessors, (16464), 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) [2023-08-29 22:13:19,672 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 686.0) internal successors, (16464), 24 states have internal predecessors, (16464), 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) [2023-08-29 22:13:19,672 INFO L175 Difference]: Start difference. First operand has 140 places, 110 transitions, 796 flow. Second operand 23 states and 5163 transitions. [2023-08-29 22:13:19,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 234 transitions, 1961 flow [2023-08-29 22:13:19,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 234 transitions, 1852 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-08-29 22:13:19,690 INFO L231 Difference]: Finished difference. Result has 159 places, 128 transitions, 1084 flow [2023-08-29 22:13:19,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1084, PETRI_PLACES=159, PETRI_TRANSITIONS=128} [2023-08-29 22:13:19,691 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 26 predicate places. [2023-08-29 22:13:19,691 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 128 transitions, 1084 flow [2023-08-29 22:13:19,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 221.1764705882353) internal successors, (3760), 17 states have internal predecessors, (3760), 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) [2023-08-29 22:13:19,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:19,692 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2023-08-29 22:13:19,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-29 22:13:19,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:19,898 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:19,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:19,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1568162561, now seen corresponding path program 1 times [2023-08-29 22:13:19,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:19,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166020063] [2023-08-29 22:13:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:19,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:13:20,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:20,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166020063] [2023-08-29 22:13:20,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166020063] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:13:20,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189591156] [2023-08-29 22:13:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:20,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:20,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:13:20,314 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:13:20,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-29 22:13:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:20,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-29 22:13:20,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:13:20,530 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-29 22:13:20,562 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 22:13:20,563 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 118 [2023-08-29 22:13:20,593 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 [2023-08-29 22:13:20,614 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 [2023-08-29 22:13:20,663 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 [2023-08-29 22:13:20,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:20,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:20,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:20,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:13:20,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:13:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:13:20,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189591156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:13:20,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:13:20,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-29 22:13:20,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706564578] [2023-08-29 22:13:20,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:13:20,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 22:13:20,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 22:13:20,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=216, Unknown=4, NotChecked=0, Total=272 [2023-08-29 22:13:22,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 686 [2023-08-29 22:13:22,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 128 transitions, 1084 flow. Second operand has 17 states, 17 states have (on average 220.94117647058823) internal successors, (3756), 17 states have internal predecessors, (3756), 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) [2023-08-29 22:13:22,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:22,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 686 [2023-08-29 22:13:22,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:23,018 INFO L130 PetriNetUnfolder]: 770/2214 cut-off events. [2023-08-29 22:13:23,018 INFO L131 PetriNetUnfolder]: For 14274/14276 co-relation queries the response was YES. [2023-08-29 22:13:23,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9110 conditions, 2214 events. 770/2214 cut-off events. For 14274/14276 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 16428 event pairs, 186 based on Foata normal form. 6/2119 useless extension candidates. Maximal degree in co-relation 9037. Up to 922 conditions per place. [2023-08-29 22:13:23,029 INFO L137 encePairwiseOnDemand]: 674/686 looper letters, 193 selfloop transitions, 54 changer transitions 15/275 dead transitions. [2023-08-29 22:13:23,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 275 transitions, 2550 flow [2023-08-29 22:13:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 22:13:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 22:13:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4744 transitions. [2023-08-29 22:13:23,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3293072330973206 [2023-08-29 22:13:23,034 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4744 transitions. [2023-08-29 22:13:23,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4744 transitions. [2023-08-29 22:13:23,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:23,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4744 transitions. [2023-08-29 22:13:23,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 225.9047619047619) internal successors, (4744), 21 states have internal predecessors, (4744), 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) [2023-08-29 22:13:23,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 686.0) internal successors, (15092), 22 states have internal predecessors, (15092), 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) [2023-08-29 22:13:23,050 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 686.0) internal successors, (15092), 22 states have internal predecessors, (15092), 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) [2023-08-29 22:13:23,050 INFO L175 Difference]: Start difference. First operand has 159 places, 128 transitions, 1084 flow. Second operand 21 states and 4744 transitions. [2023-08-29 22:13:23,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 275 transitions, 2550 flow [2023-08-29 22:13:23,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 275 transitions, 2315 flow, removed 103 selfloop flow, removed 12 redundant places. [2023-08-29 22:13:23,092 INFO L231 Difference]: Finished difference. Result has 168 places, 155 transitions, 1385 flow [2023-08-29 22:13:23,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1385, PETRI_PLACES=168, PETRI_TRANSITIONS=155} [2023-08-29 22:13:23,092 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 35 predicate places. [2023-08-29 22:13:23,092 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 155 transitions, 1385 flow [2023-08-29 22:13:23,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 220.94117647058823) internal successors, (3756), 17 states have internal predecessors, (3756), 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) [2023-08-29 22:13:23,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:23,093 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2023-08-29 22:13:23,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-29 22:13:23,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:23,300 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:23,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:23,300 INFO L85 PathProgramCache]: Analyzing trace with hash 151399309, now seen corresponding path program 1 times [2023-08-29 22:13:23,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:23,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870979941] [2023-08-29 22:13:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:23,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:13:23,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:23,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870979941] [2023-08-29 22:13:23,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870979941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:13:23,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928831197] [2023-08-29 22:13:23,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:23,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:23,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:13:23,691 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:13:23,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-29 22:13:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:23,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-29 22:13:23,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:13:23,926 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 22:13:23,926 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 124 [2023-08-29 22:13:23,935 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 106 [2023-08-29 22:13:23,957 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 [2023-08-29 22:13:23,974 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 [2023-08-29 22:13:23,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 22:13:24,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:24,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:24,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:24,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:13:24,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:13:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:13:24,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928831197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:13:24,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:13:24,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-29 22:13:24,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051976517] [2023-08-29 22:13:24,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:13:24,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 22:13:24,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:24,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 22:13:24,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=215, Unknown=6, NotChecked=0, Total=272 [2023-08-29 22:13:24,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 686 [2023-08-29 22:13:24,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 155 transitions, 1385 flow. Second operand has 17 states, 17 states have (on average 221.0) internal successors, (3757), 17 states have internal predecessors, (3757), 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) [2023-08-29 22:13:24,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:24,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 686 [2023-08-29 22:13:24,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:24,927 INFO L130 PetriNetUnfolder]: 811/2379 cut-off events. [2023-08-29 22:13:24,927 INFO L131 PetriNetUnfolder]: For 14445/14445 co-relation queries the response was YES. [2023-08-29 22:13:24,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9924 conditions, 2379 events. 811/2379 cut-off events. For 14445/14445 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 18178 event pairs, 269 based on Foata normal form. 6/2279 useless extension candidates. Maximal degree in co-relation 9495. Up to 1342 conditions per place. [2023-08-29 22:13:24,938 INFO L137 encePairwiseOnDemand]: 673/686 looper letters, 178 selfloop transitions, 45 changer transitions 32/268 dead transitions. [2023-08-29 22:13:24,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 268 transitions, 2611 flow [2023-08-29 22:13:24,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 22:13:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 22:13:24,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5157 transitions. [2023-08-29 22:13:24,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32684750919001143 [2023-08-29 22:13:24,943 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5157 transitions. [2023-08-29 22:13:24,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5157 transitions. [2023-08-29 22:13:24,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:24,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5157 transitions. [2023-08-29 22:13:24,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 224.2173913043478) internal successors, (5157), 23 states have internal predecessors, (5157), 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) [2023-08-29 22:13:24,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 686.0) internal successors, (16464), 24 states have internal predecessors, (16464), 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) [2023-08-29 22:13:24,959 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 686.0) internal successors, (16464), 24 states have internal predecessors, (16464), 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) [2023-08-29 22:13:24,959 INFO L175 Difference]: Start difference. First operand has 168 places, 155 transitions, 1385 flow. Second operand 23 states and 5157 transitions. [2023-08-29 22:13:24,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 268 transitions, 2611 flow [2023-08-29 22:13:25,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 268 transitions, 2339 flow, removed 128 selfloop flow, removed 5 redundant places. [2023-08-29 22:13:25,006 INFO L231 Difference]: Finished difference. Result has 194 places, 168 transitions, 1507 flow [2023-08-29 22:13:25,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1507, PETRI_PLACES=194, PETRI_TRANSITIONS=168} [2023-08-29 22:13:25,007 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 61 predicate places. [2023-08-29 22:13:25,007 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 168 transitions, 1507 flow [2023-08-29 22:13:25,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 221.0) internal successors, (3757), 17 states have internal predecessors, (3757), 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) [2023-08-29 22:13:25,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:25,008 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2023-08-29 22:13:25,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-29 22:13:25,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:25,217 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:25,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1853745469, now seen corresponding path program 2 times [2023-08-29 22:13:25,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:25,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9899556] [2023-08-29 22:13:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:25,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:13:25,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:25,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9899556] [2023-08-29 22:13:25,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9899556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:13:25,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075654061] [2023-08-29 22:13:25,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:13:25,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:25,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:13:25,589 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:13:25,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-29 22:13:25,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:13:25,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:13:25,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-29 22:13:25,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:13:25,854 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 22:13:25,854 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 124 [2023-08-29 22:13:25,863 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 106 [2023-08-29 22:13:25,890 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 [2023-08-29 22:13:25,913 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 [2023-08-29 22:13:25,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:25,983 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 [2023-08-29 22:13:26,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:26,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:26,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:13:26,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:13:26,139 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1611 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1611) |c_~#B~0.base|) |c_~#B~0.offset|) 1)) is different from false [2023-08-29 22:13:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2023-08-29 22:13:26,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075654061] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:13:26,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:13:26,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-29 22:13:26,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742710726] [2023-08-29 22:13:26,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:13:26,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 22:13:26,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 22:13:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=250, Unknown=1, NotChecked=32, Total=342 [2023-08-29 22:13:26,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 686 [2023-08-29 22:13:26,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 168 transitions, 1507 flow. Second operand has 19 states, 19 states have (on average 220.21052631578948) internal successors, (4184), 19 states have internal predecessors, (4184), 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) [2023-08-29 22:13:26,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:26,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 686 [2023-08-29 22:13:26,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:26,806 INFO L130 PetriNetUnfolder]: 799/2331 cut-off events. [2023-08-29 22:13:26,806 INFO L131 PetriNetUnfolder]: For 11670/11670 co-relation queries the response was YES. [2023-08-29 22:13:26,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9470 conditions, 2331 events. 799/2331 cut-off events. For 11670/11670 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 17707 event pairs, 278 based on Foata normal form. 3/2230 useless extension candidates. Maximal degree in co-relation 9389. Up to 973 conditions per place. [2023-08-29 22:13:26,817 INFO L137 encePairwiseOnDemand]: 675/686 looper letters, 138 selfloop transitions, 22 changer transitions 45/217 dead transitions. [2023-08-29 22:13:26,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 217 transitions, 2265 flow [2023-08-29 22:13:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:13:26,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:13:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1821 transitions. [2023-08-29 22:13:26,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3318148688046647 [2023-08-29 22:13:26,819 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1821 transitions. [2023-08-29 22:13:26,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1821 transitions. [2023-08-29 22:13:26,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:26,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1821 transitions. [2023-08-29 22:13:26,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 227.625) internal successors, (1821), 8 states have internal predecessors, (1821), 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) [2023-08-29 22:13:26,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 686.0) internal successors, (6174), 9 states have internal predecessors, (6174), 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) [2023-08-29 22:13:26,824 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 686.0) internal successors, (6174), 9 states have internal predecessors, (6174), 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) [2023-08-29 22:13:26,824 INFO L175 Difference]: Start difference. First operand has 194 places, 168 transitions, 1507 flow. Second operand 8 states and 1821 transitions. [2023-08-29 22:13:26,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 217 transitions, 2265 flow [2023-08-29 22:13:26,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 217 transitions, 2079 flow, removed 73 selfloop flow, removed 10 redundant places. [2023-08-29 22:13:26,850 INFO L231 Difference]: Finished difference. Result has 188 places, 133 transitions, 1138 flow [2023-08-29 22:13:26,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1138, PETRI_PLACES=188, PETRI_TRANSITIONS=133} [2023-08-29 22:13:26,850 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 55 predicate places. [2023-08-29 22:13:26,850 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 133 transitions, 1138 flow [2023-08-29 22:13:26,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 220.21052631578948) internal successors, (4184), 19 states have internal predecessors, (4184), 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) [2023-08-29 22:13:26,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:26,851 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2023-08-29 22:13:26,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-29 22:13:27,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:27,051 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:27,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:27,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1166992114, now seen corresponding path program 2 times [2023-08-29 22:13:27,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:27,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125423319] [2023-08-29 22:13:27,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:27,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:13:27,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:27,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125423319] [2023-08-29 22:13:27,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125423319] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:13:27,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986798691] [2023-08-29 22:13:27,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:13:27,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:27,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:13:27,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:13:27,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-29 22:13:27,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:13:27,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:13:27,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-29 22:13:27,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:13:27,718 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 22:13:27,718 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 124 [2023-08-29 22:13:27,726 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 106 [2023-08-29 22:13:27,753 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 [2023-08-29 22:13:27,772 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 [2023-08-29 22:13:27,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:27,847 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 [2023-08-29 22:13:27,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:27,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:27,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:13:27,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:13:28,028 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1724 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1724) |c_~#B~0.base|) |c_~#B~0.offset|) 1)) is different from false [2023-08-29 22:13:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2023-08-29 22:13:28,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986798691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:13:28,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:13:28,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-29 22:13:28,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816878106] [2023-08-29 22:13:28,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:13:28,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 22:13:28,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:28,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 22:13:28,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=250, Unknown=1, NotChecked=32, Total=342 [2023-08-29 22:13:28,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 686 [2023-08-29 22:13:28,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 133 transitions, 1138 flow. Second operand has 19 states, 19 states have (on average 220.42105263157896) internal successors, (4188), 19 states have internal predecessors, (4188), 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) [2023-08-29 22:13:28,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:28,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 686 [2023-08-29 22:13:28,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:28,614 INFO L130 PetriNetUnfolder]: 562/1689 cut-off events. [2023-08-29 22:13:28,614 INFO L131 PetriNetUnfolder]: For 7883/7885 co-relation queries the response was YES. [2023-08-29 22:13:28,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6729 conditions, 1689 events. 562/1689 cut-off events. For 7883/7885 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11867 event pairs, 259 based on Foata normal form. 3/1618 useless extension candidates. Maximal degree in co-relation 6683. Up to 620 conditions per place. [2023-08-29 22:13:28,621 INFO L137 encePairwiseOnDemand]: 674/686 looper letters, 77 selfloop transitions, 12 changer transitions 79/176 dead transitions. [2023-08-29 22:13:28,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 176 transitions, 1777 flow [2023-08-29 22:13:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:13:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:13:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2032 transitions. [2023-08-29 22:13:28,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3291221250404924 [2023-08-29 22:13:28,623 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2032 transitions. [2023-08-29 22:13:28,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2032 transitions. [2023-08-29 22:13:28,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:28,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2032 transitions. [2023-08-29 22:13:28,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.77777777777777) internal successors, (2032), 9 states have internal predecessors, (2032), 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) [2023-08-29 22:13:28,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 686.0) internal successors, (6860), 10 states have internal predecessors, (6860), 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) [2023-08-29 22:13:28,630 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 686.0) internal successors, (6860), 10 states have internal predecessors, (6860), 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) [2023-08-29 22:13:28,630 INFO L175 Difference]: Start difference. First operand has 188 places, 133 transitions, 1138 flow. Second operand 9 states and 2032 transitions. [2023-08-29 22:13:28,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 176 transitions, 1777 flow [2023-08-29 22:13:28,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 176 transitions, 1667 flow, removed 10 selfloop flow, removed 18 redundant places. [2023-08-29 22:13:28,647 INFO L231 Difference]: Finished difference. Result has 170 places, 84 transitions, 719 flow [2023-08-29 22:13:28,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=719, PETRI_PLACES=170, PETRI_TRANSITIONS=84} [2023-08-29 22:13:28,647 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 37 predicate places. [2023-08-29 22:13:28,648 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 84 transitions, 719 flow [2023-08-29 22:13:28,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 220.42105263157896) internal successors, (4188), 19 states have internal predecessors, (4188), 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) [2023-08-29 22:13:28,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:13:28,648 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2023-08-29 22:13:28,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-29 22:13:28,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-29 22:13:28,849 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:13:28,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:13:28,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1611177303, now seen corresponding path program 2 times [2023-08-29 22:13:28,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:13:28,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018563788] [2023-08-29 22:13:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:13:28,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:13:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:13:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:13:29,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:13:29,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018563788] [2023-08-29 22:13:29,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018563788] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:13:29,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868488034] [2023-08-29 22:13:29,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:13:29,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:13:29,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:13:29,246 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:13:29,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-29 22:13:29,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:13:29,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:13:29,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-29 22:13:29,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:13:29,554 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-29 22:13:29,569 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 22:13:29,569 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 118 [2023-08-29 22:13:29,605 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 [2023-08-29 22:13:29,622 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 [2023-08-29 22:13:29,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:29,688 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 [2023-08-29 22:13:29,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:29,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:29,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:13:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:13:29,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:13:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:13:29,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868488034] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:13:29,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:13:29,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-29 22:13:29,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844632923] [2023-08-29 22:13:29,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:13:29,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 22:13:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:13:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 22:13:29,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=345, Unknown=3, NotChecked=0, Total=420 [2023-08-29 22:13:32,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 686 [2023-08-29 22:13:32,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 84 transitions, 719 flow. Second operand has 21 states, 21 states have (on average 282.4761904761905) internal successors, (5932), 21 states have internal predecessors, (5932), 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) [2023-08-29 22:13:32,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:13:32,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 686 [2023-08-29 22:13:32,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:13:32,588 INFO L130 PetriNetUnfolder]: 246/733 cut-off events. [2023-08-29 22:13:32,588 INFO L131 PetriNetUnfolder]: For 2747/2749 co-relation queries the response was YES. [2023-08-29 22:13:32,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 733 events. 246/733 cut-off events. For 2747/2749 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3991 event pairs, 127 based on Foata normal form. 3/735 useless extension candidates. Maximal degree in co-relation 2904. Up to 448 conditions per place. [2023-08-29 22:13:32,590 INFO L137 encePairwiseOnDemand]: 675/686 looper letters, 0 selfloop transitions, 0 changer transitions 101/101 dead transitions. [2023-08-29 22:13:32,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 101 transitions, 1064 flow [2023-08-29 22:13:32,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:13:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:13:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2556 transitions. [2023-08-29 22:13:32,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139941690962099 [2023-08-29 22:13:32,593 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2556 transitions. [2023-08-29 22:13:32,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2556 transitions. [2023-08-29 22:13:32,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:13:32,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2556 transitions. [2023-08-29 22:13:32,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 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) [2023-08-29 22:13:32,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 686.0) internal successors, (6860), 10 states have internal predecessors, (6860), 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) [2023-08-29 22:13:32,599 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 686.0) internal successors, (6860), 10 states have internal predecessors, (6860), 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) [2023-08-29 22:13:32,599 INFO L175 Difference]: Start difference. First operand has 170 places, 84 transitions, 719 flow. Second operand 9 states and 2556 transitions. [2023-08-29 22:13:32,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 101 transitions, 1064 flow [2023-08-29 22:13:32,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 101 transitions, 852 flow, removed 47 selfloop flow, removed 32 redundant places. [2023-08-29 22:13:32,607 INFO L231 Difference]: Finished difference. Result has 113 places, 0 transitions, 0 flow [2023-08-29 22:13:32,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=113, PETRI_TRANSITIONS=0} [2023-08-29 22:13:32,607 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -20 predicate places. [2023-08-29 22:13:32,607 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 0 transitions, 0 flow [2023-08-29 22:13:32,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 282.4761904761905) internal successors, (5932), 21 states have internal predecessors, (5932), 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) [2023-08-29 22:13:32,608 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 60 remaining) [2023-08-29 22:13:32,608 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 60 remaining) [2023-08-29 22:13:32,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 60 remaining) [2023-08-29 22:13:32,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 60 remaining) [2023-08-29 22:13:32,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 60 remaining) [2023-08-29 22:13:32,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 60 remaining) [2023-08-29 22:13:32,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 60 remaining) [2023-08-29 22:13:32,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (52 of 60 remaining) [2023-08-29 22:13:32,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (51 of 60 remaining) [2023-08-29 22:13:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 60 remaining) [2023-08-29 22:13:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 60 remaining) [2023-08-29 22:13:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 60 remaining) [2023-08-29 22:13:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 60 remaining) [2023-08-29 22:13:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 60 remaining) [2023-08-29 22:13:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 60 remaining) [2023-08-29 22:13:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 60 remaining) [2023-08-29 22:13:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 60 remaining) [2023-08-29 22:13:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 60 remaining) [2023-08-29 22:13:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 60 remaining) [2023-08-29 22:13:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 60 remaining) [2023-08-29 22:13:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 60 remaining) [2023-08-29 22:13:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 60 remaining) [2023-08-29 22:13:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 60 remaining) [2023-08-29 22:13:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 60 remaining) [2023-08-29 22:13:32,612 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 60 remaining) [2023-08-29 22:13:32,612 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 60 remaining) [2023-08-29 22:13:32,612 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 60 remaining) [2023-08-29 22:13:32,612 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 60 remaining) [2023-08-29 22:13:32,612 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 60 remaining) [2023-08-29 22:13:32,612 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 60 remaining) [2023-08-29 22:13:32,612 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 60 remaining) [2023-08-29 22:13:32,612 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 60 remaining) [2023-08-29 22:13:32,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 60 remaining) [2023-08-29 22:13:32,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 60 remaining) [2023-08-29 22:13:32,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 60 remaining) [2023-08-29 22:13:32,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 60 remaining) [2023-08-29 22:13:32,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 60 remaining) [2023-08-29 22:13:32,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 60 remaining) [2023-08-29 22:13:32,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 60 remaining) [2023-08-29 22:13:32,614 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 60 remaining) [2023-08-29 22:13:32,614 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (19 of 60 remaining) [2023-08-29 22:13:32,614 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 60 remaining) [2023-08-29 22:13:32,614 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 60 remaining) [2023-08-29 22:13:32,614 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 60 remaining) [2023-08-29 22:13:32,614 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 60 remaining) [2023-08-29 22:13:32,614 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 60 remaining) [2023-08-29 22:13:32,614 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 60 remaining) [2023-08-29 22:13:32,615 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 60 remaining) [2023-08-29 22:13:32,615 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 60 remaining) [2023-08-29 22:13:32,615 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 60 remaining) [2023-08-29 22:13:32,615 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (9 of 60 remaining) [2023-08-29 22:13:32,615 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 60 remaining) [2023-08-29 22:13:32,615 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 60 remaining) [2023-08-29 22:13:32,615 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 60 remaining) [2023-08-29 22:13:32,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (5 of 60 remaining) [2023-08-29 22:13:32,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 60 remaining) [2023-08-29 22:13:32,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 60 remaining) [2023-08-29 22:13:32,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 60 remaining) [2023-08-29 22:13:32,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 60 remaining) [2023-08-29 22:13:32,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 60 remaining) [2023-08-29 22:13:32,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-29 22:13:32,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-29 22:13:32,823 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:13:32,823 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 22:13:32,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 367 transitions, 764 flow [2023-08-29 22:13:32,933 INFO L130 PetriNetUnfolder]: 106/727 cut-off events. [2023-08-29 22:13:32,933 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 22:13:32,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 727 events. 106/727 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3476 event pairs, 1 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-08-29 22:13:32,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 319 places, 367 transitions, 764 flow [2023-08-29 22:13:32,944 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 365 transitions, 760 flow [2023-08-29 22:13:32,945 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:13:32,945 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 318 places, 365 transitions, 760 flow [2023-08-29 22:13:32,945 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 318 places, 365 transitions, 760 flow [2023-08-29 22:13:32,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 365 transitions, 760 flow [2023-08-29 22:13:33,002 INFO L130 PetriNetUnfolder]: 105/725 cut-off events. [2023-08-29 22:13:33,002 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 22:13:33,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 725 events. 105/725 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3521 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 507. Up to 16 conditions per place. [2023-08-29 22:13:33,024 INFO L119 LiptonReduction]: Number of co-enabled transitions 67134 Killed by 15